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230927_AJAX 강의 본문

대덕인재개발원/대덕인재개발원_Front End

230927_AJAX 강의

Unlimited00 2023. 9. 27. 11:07


[ProdVO.java]

package kr.or.ddit.prod.vo;

public class ProdVO {

	private String prod_id;
	private String prod_name;
	private String prod_lgu;
	private String prod_buyer;
	private int prod_cost;
	private int prod_price;
	private int prod_sale;
	private String prod_outline;
	private String prod_detail;
	private String prod_img;
	private int prod_totalstock;
	private String prod_insdate;
	private int prod_properstock;
	private String prod_size;
	private String prod_color;
	private String prod_delivery;
	private String prod_unit;
	private int prod_qtyin;
	private int prod_qtysale;
	private int prod_mileage;
	
	public ProdVO() {}
	public ProdVO(String prod_id, String prod_name, String prod_lgu, String prod_buyer, int prod_cost, int prod_price,
			int prod_sale, String prod_outline, String prod_detail, String prod_img, int prod_totalstock,
			String prod_insdate, int prod_properstock, String prod_size, String prod_color, String prod_delivery,
			String prod_unit, int prod_qtyin, int prod_qtysale, int prod_mileage) {
		this.prod_id = prod_id;
		this.prod_name = prod_name;
		this.prod_lgu = prod_lgu;
		this.prod_buyer = prod_buyer;
		this.prod_cost = prod_cost;
		this.prod_price = prod_price;
		this.prod_sale = prod_sale;
		this.prod_outline = prod_outline;
		this.prod_detail = prod_detail;
		this.prod_img = prod_img;
		this.prod_totalstock = prod_totalstock;
		this.prod_insdate = prod_insdate;
		this.prod_properstock = prod_properstock;
		this.prod_size = prod_size;
		this.prod_color = prod_color;
		this.prod_delivery = prod_delivery;
		this.prod_unit = prod_unit;
		this.prod_qtyin = prod_qtyin;
		this.prod_qtysale = prod_qtysale;
		this.prod_mileage = prod_mileage;
	}
	
	public String getProd_id() {
		return prod_id;
	}
	public void setProd_id(String prod_id) {
		this.prod_id = prod_id;
	}
	public String getProd_name() {
		return prod_name;
	}
	public void setProd_name(String prod_name) {
		this.prod_name = prod_name;
	}
	public String getProd_lgu() {
		return prod_lgu;
	}
	public void setProd_lgu(String prod_lgu) {
		this.prod_lgu = prod_lgu;
	}
	public String getProd_buyer() {
		return prod_buyer;
	}
	public void setProd_buyer(String prod_buyer) {
		this.prod_buyer = prod_buyer;
	}
	public int getProd_cost() {
		return prod_cost;
	}
	public void setProd_cost(int prod_cost) {
		this.prod_cost = prod_cost;
	}
	public int getProd_price() {
		return prod_price;
	}
	public void setProd_price(int prod_price) {
		this.prod_price = prod_price;
	}
	public int getProd_sale() {
		return prod_sale;
	}
	public void setProd_sale(int prod_sale) {
		this.prod_sale = prod_sale;
	}
	public String getProd_outline() {
		return prod_outline;
	}
	public void setProd_outline(String prod_outline) {
		this.prod_outline = prod_outline;
	}
	public String getProd_detail() {
		return prod_detail;
	}
	public void setProd_detail(String prod_detail) {
		this.prod_detail = prod_detail;
	}
	public String getProd_img() {
		return prod_img;
	}
	public void setProd_img(String prod_img) {
		this.prod_img = prod_img;
	}
	public int getProd_totalstock() {
		return prod_totalstock;
	}
	public void setProd_totalstock(int prod_totalstock) {
		this.prod_totalstock = prod_totalstock;
	}
	public String getProd_insdate() {
		return prod_insdate;
	}
	public void setProd_insdate(String prod_insdate) {
		this.prod_insdate = prod_insdate;
	}
	public int getProd_properstock() {
		return prod_properstock;
	}
	public void setProd_properstock(int prod_properstock) {
		this.prod_properstock = prod_properstock;
	}
	public String getProd_size() {
		return prod_size;
	}
	public void setProd_size(String prod_size) {
		this.prod_size = prod_size;
	}
	public String getProd_color() {
		return prod_color;
	}
	public void setProd_color(String prod_color) {
		this.prod_color = prod_color;
	}
	public String getProd_delivery() {
		return prod_delivery;
	}
	public void setProd_delivery(String prod_delivery) {
		this.prod_delivery = prod_delivery;
	}
	public String getProd_unit() {
		return prod_unit;
	}
	public void setProd_unit(String prod_unit) {
		this.prod_unit = prod_unit;
	}
	public int getProd_qtyin() {
		return prod_qtyin;
	}
	public void setProd_qtyin(int prod_qtyin) {
		this.prod_qtyin = prod_qtyin;
	}
	public int getProd_qtysale() {
		return prod_qtysale;
	}
	public void setProd_qtysale(int prod_qtysale) {
		this.prod_qtysale = prod_qtysale;
	}
	public int getProd_mileage() {
		return prod_mileage;
	}
	public void setProd_mileage(int prod_mileage) {
		this.prod_mileage = prod_mileage;
	}
	
	@Override
	public String toString() {
		return "ProdVO [prod_id=" + prod_id + ", prod_name=" + prod_name + ", prod_lgu=" + prod_lgu + ", prod_buyer="
				+ prod_buyer + ", prod_cost=" + prod_cost + ", prod_price=" + prod_price + ", prod_sale=" + prod_sale
				+ ", prod_outline=" + prod_outline + ", prod_detail=" + prod_detail + ", prod_img=" + prod_img
				+ ", prod_totalstock=" + prod_totalstock + ", prod_insdate=" + prod_insdate + ", prod_properstock="
				+ prod_properstock + ", prod_size=" + prod_size + ", prod_color=" + prod_color + ", prod_delivery="
				+ prod_delivery + ", prod_unit=" + prod_unit + ", prod_qtyin=" + prod_qtyin + ", prod_qtysale="
				+ prod_qtysale + ", prod_mileage=" + prod_mileage + "]";
	}
	
}

[ILprodDao.java]

package kr.or.ddit.lprod.dao;

import java.util.List;

import kr.or.ddit.lprod.vo.LprodVO;

public interface ILprodDao {

	public List<LprodVO> selectLprod();
	
}

[ILprodService.java]

package kr.or.ddit.lprod.service;

import java.util.List;

import kr.or.ddit.lprod.vo.LprodVO;

public interface ILprodService {

	public List<LprodVO> selectLprod();
	
}

[mybatis-config.xml]

<?xml version="1.0" encoding="UTF-8"?>
<!-- 이 문서는 MyBatis의 환경 설정을 구성하는 문서입니다. -->
<!DOCTYPE configuration 
	PUBLIC "-//mybatis.org/DTD Config 3.0//EN" 
	"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<!-- DB연결 정보가 저장된 properties파일에 대한 정보를 설정한다. -->
	<properties resource="kr/or/ddit/mybatis/config/dbinfo.properties" />
	
	<!-- MyBatis 설정과 관련된 기본 setting 설정 -->
	<settings>
		<!-- 데이터가 null로 전달되었으면 빈칸으로 인식하지 말고 null로 인식하라 -->
		<setting name="jdbcTypeForNull" value="NULL" />
	</settings>
	
	<!-- 
		MyBatis에서 파라미터로 사용하는 객체는 패키지명을 포함한 전체 이름을 지정해야 한다. 
		그렇게 되면 전체 이름이 너무 길어질 수 있어서 이것을 짧은 이름으로 사용하기 위한
		별칭을 설정할 수 있다.
		형식) <typeAlias type="패키지명이 포함된 전체 클래스명" alias="별칭이름" />
	-->
	<typeAliases>
		<typeAlias type="kr.or.ddit.member.vo.MemberVO" alias="memberVo" />
		<typeAlias type="kr.or.ddit.lprod.vo.LprodVO" alias="lprodVo" />
		<typeAlias type="kr.or.ddit.buyer.vo.BuyerVO" alias="buyerVo" />
		<typeAlias type="kr.or.ddit.prod.vo.ProdVO" alias="prodVo" />
	</typeAliases>
	
	<!-- DB연결 설정 -->
	<environments default="oracleDev">
		<environment id="oracleDev">
			<!-- 오라클 -->
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${driver}" />
				<property name="url" value="${url}" />
				<property name="username" value="${user}" />
				<property name="password" value="${pass}" />
			</dataSource>
		</environment>
		<!-- <environment id="m1">
			MySql
		</environment> -->
	</environments>
	
	<!-- DB에서 처리될 SQL문들이 작성된 mapper파일들을 등록하는 부분 -->
	<!-- 형식) <mapper resource="경로명/파일명.xml" /> -->
	<mappers>
		<mapper resource="kr/or/ddit/mybatis/mapper/member.xml" />
		<mapper resource="kr/or/ddit/mybatis/mapper/lprod.xml" />
		<mapper resource="kr/or/ddit/mybatis/mapper/buyer.xml" />
		<mapper resource="kr/or/ddit/mybatis/mapper/prod.xml" />
	</mappers>
</configuration>

[prod.xml]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper 
	PUBLIC "-//mybatis.org/DTD Mapper 3.0//EN" 
	"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="prod">
	
	<select id="selectProdByLgu" parameterType="String" resultType="prodVo">
		select prod_id, prod_name from prod where prod_lgu = #{prod_lgu}
	</select>
	
	<select id="selectProdByPid" parameterType="String" resultType="prodVo">
		select * from prod where prod_id = #{prod_id}
	</select>
	
</mapper>

[LprodDaoImpl.java]

package kr.or.ddit.lprod.dao;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import kr.or.ddit.lprod.vo.LprodVO;
import kr.or.ddit.mybatis.config.MyBatisUtil;

public class LprodDaoImpl implements ILprodDao {

	// 싱글톤 패턴
	private static LprodDaoImpl dao;
	private LprodDaoImpl() {}
	public static LprodDaoImpl getInstance() {
		if(dao == null) dao = new LprodDaoImpl();
		return dao;
	}
	
	@Override
	public List<LprodVO> selectLprod() {
		SqlSession session = null;
		List<LprodVO> lprodList = null;
		
		try {
			session = MyBatisUtil.getSqlSession();
			lprodList = session.selectList("lprod.selectLprod");
			
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(session != null) session.close();
		}
		
		return lprodList;
	}

}

[LprodServiceImpl.java]

package kr.or.ddit.lprod.service;

import java.util.List;

import kr.or.ddit.lprod.dao.ILprodDao;
import kr.or.ddit.lprod.dao.LprodDaoImpl;
import kr.or.ddit.lprod.vo.LprodVO;

public class LprodServiceImpl implements ILprodService {

	private ILprodDao dao;
	
	// 싱글톤 패턴
	private static LprodServiceImpl service;
	private LprodServiceImpl() {
		dao = LprodDaoImpl.getInstance();
	}
	public static LprodServiceImpl getInstance() {
		if(service == null) service = new LprodServiceImpl();
		return service;
	}
	
	@Override
	public List<LprodVO> selectLprod() {
		return dao.selectLprod();
	}

}

[SelectLprod.java]

package kr.or.ddit.lprod.controller;

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import kr.or.ddit.lprod.service.ILprodService;
import kr.or.ddit.lprod.service.LprodServiceImpl;
import kr.or.ddit.lprod.vo.LprodVO;


@WebServlet("/selectLprod.do")
public class SelectLprod extends HttpServlet {
	
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		ILprodService service = LprodServiceImpl.getInstance();
		List<LprodVO> lprodList = service.selectLprod();
		request.setAttribute("lprodList", lprodList);
		RequestDispatcher disp = request.getRequestDispatcher("/0927/lprodListAll.jsp");
		disp.forward(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

[lprodListAll.jsp]

<%@page import="com.google.gson.Gson"%>
<%@page import="kr.or.ddit.lprod.vo.LprodVO"%>
<%@page import="java.util.List"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	List<LprodVO> lprodList = (List<LprodVO>) request.getAttribute("lprodList");

	Gson gson = new Gson();
	
	String result = gson.toJson(lprodList);
	
	out.print(result);
%>
<%-- 
[
	<% 
		for(int i=0; i<lprodList.size(); i++) {
			LprodVO vo = lprodList.get(i);
			if(i > 0) out.print(",");
	%>
			{
				"id" : "<%= vo.getLprod_id() %>",
				"gu" : "<%= vo.getLprod_gu() %>",
				"nm" : "<%= vo.getLprod_nm() %>"
			}
	<% 
		}
	%>
]
--%>

[lprod_prod_front.jsp]

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="ko">
	<head>
		<meta charset="UTF-8" />
        <meta name="author" content="LeeGJ" />
        <meta name="copyright" content="대덕인재개발원" />
        <meta name="description" content="Ajax05" />
        <meta name="keywords" content="대덕인재개발원, html, Ajax05" />
        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
        <title>Ajax05</title>
        <link href="../css/style07.css" rel="stylesheet" />
        <script src="../js/jquery-3.7.1.min.js"></script>
        <style>
            div, form {
                border: 3px dotted yellowgreen;
                margin: 20px;
                padding: 20px;
                font-size: 1.2rem;
                word-break: break-all;
            }
            input[type=button],
            button[type=button] {
                display: inline-block;
                padding: 5px 10px;
                text-align: center;
                font-size: 1.2em;
                font-weight: 700;
                background-color: blue;
                color: white;
                border: none;
                border-radius: 4px;
                margin-right: 10px;
                cursor: pointer;
            }
        </style>
        <script>
            
            $(function(){
                
                $.ajax({
                	url : "/jqpro/selectLprod.do",
                	type : "get",
                	success : function(res){
                		var code = "";
                		$.each(res, function(i, v){
                			//code += "<option value="+ v.gu +">"+ v.nm +"</option>";
                            code += "<option value="+ v.lprod_gu +">"+ v.lprod_nm +"</option>";
                		})
                		// console.log(code);
                		
                		$("#lprod").append(code);
                	},
                	error : function(xhr){
                		alert("상태 : " + xhr.status);
                	},
                	dataType : "json"
                });
                
            });
            
        </script>
	</head>
	<body>
	
		<hr color="red" /> 
        
        <h1>
            lprod.jsp
            <br />
            public List&lt;LprodVO&gt; selectLprod();
            <br />
            public List&lt;ProdVO&gt; selectByLgu(String lgu);
            <br />
            public ProdVO selectByIdDetail(String pId);
            <br />
            작업 순서 => VO 만들기, interface 만들기(ILprodDao, ILprodService, IProdDao, IProdService), 
            <br />
            class 만들기(LprodDaoImpl, LProdService, ProdDaoImpl, ProdServiceImpl), 
            <br />
            config설정 - vo typeAlias 설정, mapper 등록
            <br />
            mapper 만들기, controller 만들기, view 만들기, 클라이언트 만들기
            <br />
            select * from lprod;
            <br />
			select prod_id, prod_name from prod where prod_lgu = 'P101';
            <br />
			select * from prod where prod_id = 'P101000001';
        </h1>
        
        <br />
        <input id="btn1" type="button" value="실행" />
        <br />
        
        <br />
        
        <select id="lprod" name="lprod">
        	<!-- <option value="">--선택--</option> -->
            <!--<option value="P101">컴퓨터제품</option>
            <option value="P102">전자제품</option>
            <option value="P201">여성캐주얼</option>
            <option value="P202">남성캐주얼</option>
            <option value="P301">피혁잡화</option>
            <option value="P302">화장품</option>
            <option value="P401">음반/CD</option>
            <option value="P402">도서</option>
            <option value="P403">문구류</option>-->
        </select>
        
        <select id="prod" name="prod">
        	<!-- <option value="empty">--선택--</option> -->
            <!--<option value="P201000001">여성 봄 셔츠 1</option>
            <option value="P201000002">여성 봄 셔츠 2</option>
            <option value="P201000003">여성 봄 셔츠 3</option>
            <option value="P201000004">여성 여름 셔츠 1</option>-->
        </select>
        
        <div id="result1"></div>
        
        <hr color="red" />
	
	</body>
</html>

[IProdService.java]

package kr.or.ddit.prod.service;

import java.util.List;

import kr.or.ddit.prod.vo.ProdVO;

public interface IProdService {

	public List<ProdVO> selectProdByLgu(String lgu);
	public ProdVO selectProdByPid(String pid);
	
}

[IProdDAO.java]

package kr.or.ddit.prod.dao;

import java.util.List;

import kr.or.ddit.prod.vo.ProdVO;

public interface IProdDAO {
	
	public List<ProdVO> selectProdByLgu(String lgu);
	public ProdVO selectProdByPid(String pid);
	
}

[ProdDaoImpl.java]

package kr.or.ddit.prod.dao;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import kr.or.ddit.mybatis.config.MyBatisUtil;
import kr.or.ddit.prod.vo.ProdVO;

public class ProdDaoImpl implements IProdDAO {

	// 싱글톤 패턴
	private static ProdDaoImpl dao;
	private ProdDaoImpl() {}
	public static ProdDaoImpl getInstance() {
		if(dao == null) dao = new ProdDaoImpl();
		return dao;
	}
	
	@Override
	public List<ProdVO> selectProdByLgu(String lgu) {
		SqlSession session = null;
		List<ProdVO> prodList = null;
		
		try {
			session = MyBatisUtil.getSqlSession();
			prodList = session.selectList("prod.selectProdByLgu", lgu);
			
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(session != null) session.close();
		}
		
		return prodList;
	}

	@Override
	public ProdVO selectProdByPid(String pid) {
		SqlSession session = null;
		ProdVO prodVo = null;
		
		try {
			session = MyBatisUtil.getSqlSession();
			prodVo = session.selectOne("prod.selectProdByPid", pid);
			
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(session != null) session.close();
		}
		
		return prodVo;
	}

}

[ProdServiceImpl.java]

package kr.or.ddit.prod.service;

import java.util.List;

import kr.or.ddit.prod.dao.IProdDAO;
import kr.or.ddit.prod.dao.ProdDaoImpl;
import kr.or.ddit.prod.vo.ProdVO;

public class ProdServiceImpl implements IProdService {

	private IProdDAO dao;
	
	// 싱글톤 패턴
	private static ProdServiceImpl service;
	private ProdServiceImpl() {
		dao = ProdDaoImpl.getInstance();
	}
	public static ProdServiceImpl getInstance() {
		if(service == null) service = new ProdServiceImpl();
		return service;
	}
	
	@Override
	public List<ProdVO> selectProdByLgu(String lgu) {
		return dao.selectProdByLgu(lgu);
	}

	@Override
	public ProdVO selectProdByPid(String pid) {
		return dao.selectProdByPid(pid);
	}

}

[SelectProdByLgu.java]

package kr.or.ddit.prod.controller;

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import kr.or.ddit.prod.service.IProdService;
import kr.or.ddit.prod.service.ProdServiceImpl;
import kr.or.ddit.prod.vo.ProdVO;


@WebServlet("/selectProdByLgu.do")
public class SelectProdByLgu extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		String selGu = request.getParameter("selGu");
		IProdService service = ProdServiceImpl.getInstance();
		List<ProdVO> prodList = service.selectProdByLgu(selGu);
		request.setAttribute("prodList", prodList);
		RequestDispatcher disp = request.getRequestDispatcher("/0927/prodListAll.jsp");
		disp.forward(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

[prodListAll.jsp]

<%@page import="com.google.gson.Gson"%>
<%@page import="kr.or.ddit.prod.vo.ProdVO"%>
<%@page import="java.util.List"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	List<ProdVO> prodList = (List<ProdVO>) request.getAttribute("prodList");

	Gson gson = new Gson();
	
	String result = gson.toJson(prodList);
	
	out.print(result);
%>
<%-- 
[
	<% 
		for(int i=0; i<prodList.size(); i++) {
			ProdVO vo = prodList.get(i);
			if(i > 0) out.print(",");
	%>
			{
				"id" : "<%= vo.getProd_id() %>",
				"name" : "<%= vo.getProd_name() %>"
			}
	<% 
		}
	%>
]
--%>

[lprod_prod_front.jsp]

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="ko">
	<head>
		<meta charset="UTF-8" />
        <meta name="author" content="LeeGJ" />
        <meta name="copyright" content="대덕인재개발원" />
        <meta name="description" content="Ajax05" />
        <meta name="keywords" content="대덕인재개발원, html, Ajax05" />
        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
        <title>Ajax05</title>
        <link href="../css/style07.css" rel="stylesheet" />
        <script src="../js/jquery-3.7.1.min.js"></script>
        <style>
            div, form {
                border: 3px dotted yellowgreen;
                margin: 20px;
                padding: 20px;
                font-size: 1.2rem;
                word-break: break-all;
            }
            input[type=button],
            button[type=button] {
                display: inline-block;
                padding: 5px 10px;
                text-align: center;
                font-size: 1.2em;
                font-weight: 700;
                background-color: blue;
                color: white;
                border: none;
                border-radius: 4px;
                margin-right: 10px;
                cursor: pointer;
            }
        </style>
        <script>
            
            $(function(){
                
            	$.ajax({
                	url : "/jqpro/selectLprod.do",
                	type : "get",
                	success : function(res){
                		var code = "";
                		$.each(res, function(i, v){
                			//code += "<option value="+ v.gu +">"+ v.nm +"</option>";
                            code += "<option value="+ v.lprod_gu +">"+ v.lprod_nm +"</option>";
                		})
                		// console.log(code);
                		
                		$("#lprod").append(code);
                	},
                	error : function(xhr){
                		alert("상태 : " + xhr.status);
                	},
                	dataType : "json"
                });
            	
                $(window).on("load", function(){
                	var selGu = $("#lprod").val();
                	//console.log(selGu);
                	$.ajax({
                		url : "/jqpro/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			var code = "";
                    		$.each(res, function(i, v){
                    			//code += "<option value="+ v.id +">"+ v.name +"</option>";
                                code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                    		})
                    		//console.log(code);
                    		
                    		$("#prod").append(code);
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                });
                
                /* $(document).on("click", "#lprod", function(){
                	alert($("option:selected", this).val());
                }); */
                
                $(document).on("change", "#lprod", function(){
                	$("#prod").empty();
                	
                	var selGu = $(this).val();
                	//console.log(selGu);
                	
                	$.ajax({
                		url : "/jqpro/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			var code = "";
                    		$.each(res, function(i, v){
                    			//code += "<option value="+ v.id +">"+ v.name +"</option>";
                                code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                    		})
                    		//console.log(code);
                    		
                    		$("#prod").append(code);
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                });
                
            });
            
        </script>
	</head>
	<body>
	
		<hr color="red" /> 
        
        <h1>
            lprod.jsp
            <br />
            public List&lt;LprodVO&gt; selectLprod();
            <br />
            public List&lt;ProdVO&gt; selectByLgu(String lgu);
            <br />
            public ProdVO selectByIdDetail(String pId);
            <br />
            작업 순서 => VO 만들기, interface 만들기(ILprodDao, ILprodService, IProdDao, IProdService), 
            <br />
            class 만들기(LprodDaoImpl, LProdService, ProdDaoImpl, ProdServiceImpl), 
            <br />
            config설정 - vo typeAlias 설정, mapper 등록
            <br />
            mapper 만들기, controller 만들기, view 만들기, 클라이언트 만들기
            <br />
            select * from lprod;
            <br />
			select prod_id, prod_name from prod where prod_lgu = 'P101';
            <br />
			select * from prod where prod_id = 'P101000001';
        </h1>
        
        <br />
        <input id="btn1" type="button" value="실행" />
        <br />
        
        <br />
        
        <select id="lprod" name="lprod">
        	<!-- <option value="">--선택--</option> -->
            <!--<option value="P101">컴퓨터제품</option>
            <option value="P102">전자제품</option>
            <option value="P201">여성캐주얼</option>
            <option value="P202">남성캐주얼</option>
            <option value="P301">피혁잡화</option>
            <option value="P302">화장품</option>
            <option value="P401">음반/CD</option>
            <option value="P402">도서</option>
            <option value="P403">문구류</option>-->
        </select>
        
        <select id="prod" name="prod">
        	<!-- <option value="empty">--선택--</option> -->
            <!--<option value="P201000001">여성 봄 셔츠 1</option>
            <option value="P201000002">여성 봄 셔츠 2</option>
            <option value="P201000003">여성 봄 셔츠 3</option>
            <option value="P201000004">여성 여름 셔츠 1</option>-->
        </select>
        
        <div id="result1"></div>
        
        <hr color="red" />
	
	</body>
</html>


[SelectProdByPid.java]

package kr.or.ddit.prod.controller;

import java.io.IOException;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import kr.or.ddit.prod.service.IProdService;
import kr.or.ddit.prod.service.ProdServiceImpl;
import kr.or.ddit.prod.vo.ProdVO;


@WebServlet("/selectProdByPid.do")
public class SelectProdByPid extends HttpServlet {

	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		String selId = request.getParameter("selId");
		IProdService service = ProdServiceImpl.getInstance();
		ProdVO prodVo = service.selectProdByPid(selId);
		request.setAttribute("prodVo", prodVo);
		RequestDispatcher disp = request.getRequestDispatcher("/0927/prodSelectOne.jsp");
		disp.forward(request, response);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

[prodSelectOne.jsp]

<%@page import="com.google.gson.Gson"%>
<%@page import="kr.or.ddit.prod.vo.ProdVO"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
	ProdVO vo = (ProdVO) request.getAttribute("prodVo");
	if(vo != null){
		Gson gson = new Gson();
		String result = gson.toJson(vo);
		out.print(result);
%>
<%-- 
		{
			"res" : "ok",
			"id" : "<%= vo.getProd_id() %>",
			"name" : "<%= vo.getProd_name() %>",
			"lgu" : "<%= vo.getProd_lgu() %>",
			"buyer" : "<%= vo.getProd_buyer() %>",
			"cost" : "<%= vo.getProd_cost() %>",
			"price" : "<%= vo.getProd_price() %>",
			"sale" : "<%= vo.getProd_sale() %>",
			"outline" : "<%= vo.getProd_outline() %>",
			"detail" : "<%= vo.getProd_detail() %>"
		}
--%>
<%
	}else{
%>
		{
			"res" : "no"
		}
<%
	}
%>

[lprod_prod_front.jsp]

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="ko">
	<head>
		<meta charset="UTF-8" />
        <meta name="author" content="LeeGJ" />
        <meta name="copyright" content="대덕인재개발원" />
        <meta name="description" content="Ajax05" />
        <meta name="keywords" content="대덕인재개발원, html, Ajax05" />
        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
        <title>Ajax05</title>
        <link href="../css/style07.css" rel="stylesheet" />
        <script src="../js/jquery-3.7.1.min.js"></script>
        <style>
            div, form {
                border: 3px dotted yellowgreen;
                margin: 20px;
                padding: 20px;
                font-size: 1.2rem;
                word-break: break-all;
            }
            input[type=button],
            button[type=button] {
                display: inline-block;
                padding: 5px 10px;
                text-align: center;
                font-size: 1.2em;
                font-weight: 700;
                background-color: blue;
                color: white;
                border: none;
                border-radius: 4px;
                margin-right: 10px;
                cursor: pointer;
            }
            #result1 table {
            	width: 100%;
            }
            #result1 th {
            	width: 50%;
            }
        </style>
        <script>
            
            $(function(){
                
            	$.ajax({
                	url : "<%= request.getContextPath() %>/selectLprod.do",
                	type : "get",
                	success : function(res){
                		var code = "";
                		$.each(res, function(i, v){
                			//code += "<option value="+ v.gu +">"+ v.nm +"</option>";
                            code += "<option value="+ v.lprod_gu +">"+ v.lprod_nm +"</option>";
                		})
                		// console.log(code);
                		
                		$("#lprod").append(code);
                	},
                	error : function(xhr){
                		alert("상태 : " + xhr.status);
                	},
                	dataType : "json"
                });
            	
                $(window).on("load", function(){
                	
                	var selGu = $("#lprod").val();
                	console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			
                			var code = "";
                			
                    		$.each(res, function(i, v){
                    			if(i == 0) {
                    				//code += "<option value="+ v.id +" selected>"+ v.name +"</option>";
                                    code += "<option value="+ v.prod_id +" selected>"+ v.prod_name +"</option>";
                    			}else{
                    				//code += "<option value="+ v.id +">"+ v.name +"</option>";
                                    code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                    			}
                    		})
                    		
                    		//console.log(code);
                    		
                    		$("#prod").append(code);
                    		
                    		var selId = $("#prod").val();
                    		console.log(selId);
                    		
                    		$.ajax({
                        		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                        		type : "post",
                        		data : {"selId" : selId},
                        		success : function(res){
                        			//if(res.res == "ok"){
                					if(res.res != "no"){
                        				var code = "<table border='1'>";
                                        code += "<tr>";
                                        code += "<th>항목</th>";
                                        code += "<th>내용</th>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_ID</td>";
                                        //code += "<td>"+ res.id +"</td>";
                                        code += "<td>"+ res.prod_id +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_NAME</td>";
                                        //code += "<td>"+ res.name +"</td>";
                                        code += "<td>"+ res.prod_name +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_LGU</td>";
                                        //code += "<td>"+ res.lgu +"</td>";
                                        code += "<td>"+ res.prod_lgu +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_BUYER</td>";
                                        //code += "<td>"+ res.buyer +"</td>";
                                        code += "<td>"+ res.prod_buyer +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_COST</td>";
                                        //code += "<td>"+ res.cost +"</td>";
                                        code += "<td>"+ res.prod_cost +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_PRICE</td>";
                                        //code += "<td>"+ res.price +"</td>";
                                        code += "<td>"+ res.prod_price +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_SALE</td>";
                                        //code += "<td>"+ res.sale +"</td>";
                                        code += "<td>"+ res.prod_sale +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_OUTLINE</td>";
                                        //code += "<td>"+ res.outline +"</td>";
                                        code += "<td>"+ res.prod_outline +"</td>";
                                        code += "</tr>";
                                        code += "<tr>";
                                        code += "<td>PROD_DETAIL</td>";
                                        //code += "<td>"+ res.detail +"</td>";
                                        code += "<td>"+ res.prod_detail +"</td>";
                                        code += "</tr>";
                                        code += "</table>";
                        				
                        				$("#result1").append(code);
                        			}else {
                        				alert("일치하는 데이터가 없습니다.");
                        				return false;
                        			}
                        		},
                        		error : function(xhr){
                        			alert("상태 : " + xhr.status);
                        		},
                        		dataType : "json"
                        	});
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                $(document).on("change", "#lprod", function(){
                	
                	$("#prod").empty();
                	$("#result1").empty();
                	
                	var selGu = $(this).val();
                	//console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			var code = "";
                    		$.each(res, function(i, v){
                    			//code += "<option value="+ v.id +">"+ v.name +"</option>";
                                code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                    		})
                    		//console.log(code);
                    		
                    		$("#prod").append(code);
                    		
                    		var selId = $("#prod").val();
                    		console.log(selId);
                    		
                    		$.ajax({
                        		rl : "<%= request.getContextPath() %>/selectProdByPid.do",
                        		type : "post",
                        		data : {"selId" : selId},
                        		success : function(res){
                        			//if(res.res == "ok"){
                        			if(res.res != "no"){
                        				var code = "<table border='1'>";
                        				code += "<tr>";
                        				code += "<th>항목</th>";
                        				code += "<th>내용</th>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_ID</td>";
                        				//code += "<td>"+ res.id +"</td>";
                        				code += "<td>"+ res.prod_id +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_NAME</td>";
                        				//code += "<td>"+ res.name +"</td>";
                        				code += "<td>"+ res.prod_name +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_LGU</td>";
                        				//code += "<td>"+ res.lgu +"</td>";
                        				code += "<td>"+ res.prod_lgu +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_BUYER</td>";
                        				//code += "<td>"+ res.buyer +"</td>";
                        				code += "<td>"+ res.prod_buyer +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_COST</td>";
                        				//code += "<td>"+ res.cost +"</td>";
                        				code += "<td>"+ res.prod_cost +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_PRICE</td>";
                        				//code += "<td>"+ res.price +"</td>";
                        				code += "<td>"+ res.prod_price +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_SALE</td>";
                        				//code += "<td>"+ res.sale +"</td>";
                        				code += "<td>"+ res.prod_sale +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_OUTLINE</td>";
                        				//code += "<td>"+ res.outline +"</td>";
                        				code += "<td>"+ res.prod_outline +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_DETAIL</td>";
                        				//code += "<td>"+ res.detail +"</td>";
                        				code += "<td>"+ res.prod_detail +"</td>";
                        				code += "</tr>";
                        				code += "</table>";
                        				
                        				$("#result1").append(code);
                        			}else {
                        				alert("일치하는 데이터가 없습니다.");
                        				return false;
                        			}
                        		},
                        		error : function(xhr){
                        			alert("상태 : " + xhr.status);
                        		},
                        		dataType : "json"
                        	});
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                $(document).on("change", "#prod", function(){
                	
                	$("#result1").empty();
                	
                	var selId = $(this).val();
                	console.log(selId);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                		type : "post",
                		data : {"selId" : selId},
                		success : function(res){
                			//if(res.res == "ok"){
                			if(res.res != "no"){
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th>항목</th>";
                				code += "<th>내용</th>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_ID</td>";
                				//code += "<td>"+ res.id +"</td>";
                				code += "<td>"+ res.prod_id +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_NAME</td>";
                				//code += "<td>"+ res.name +"</td>";
                				code += "<td>"+ res.prod_name +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_LGU</td>";
                				//code += "<td>"+ res.lgu +"</td>";
                				code += "<td>"+ res.prod_lgu +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_BUYER</td>";
                				//code += "<td>"+ res.buyer +"</td>";
                				code += "<td>"+ res.prod_buyer +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_COST</td>";
                				//code += "<td>"+ res.cost +"</td>";
                				code += "<td>"+ res.prod_cost +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_PRICE</td>";
                				//code += "<td>"+ res.price +"</td>";
                				code += "<td>"+ res.prod_price +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_SALE</td>";
                				//code += "<td>"+ res.sale +"</td>";
                				code += "<td>"+ res.prod_sale +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_OUTLINE</td>";
                				//code += "<td>"+ res.outline +"</td>";
                				code += "<td>"+ res.prod_outline +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_DETAIL</td>";
                				//code += "<td>"+ res.detail +"</td>";
                				code += "<td>"+ res.prod_detail +"</td>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                			}else {
                				alert("일치하는 데이터가 없습니다.");
                				return false;
                			}
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                });
                
            });
            
        </script>
	</head>
	<body>
	
		<hr color="red" /> 
        
        <h1>
            lprod.jsp
            <br />
            public List&lt;LprodVO&gt; selectLprod();
            <br />
            public List&lt;ProdVO&gt; selectByLgu(String lgu);
            <br />
            public ProdVO selectByIdDetail(String pId);
            <br />
            작업 순서 => VO 만들기, interface 만들기(ILprodDao, ILprodService, IProdDao, IProdService), 
            <br />
            class 만들기(LprodDaoImpl, LProdService, ProdDaoImpl, ProdServiceImpl), 
            <br />
            config설정 - vo typeAlias 설정, mapper 등록
            <br />
            mapper 만들기, controller 만들기, view 만들기, 클라이언트 만들기
            <br />
            select * from lprod;
            <br />
			select prod_id, prod_name from prod where prod_lgu = 'P101';
            <br />
			select * from prod where prod_id = 'P101000001';
        </h1>
        
        <br />
        <input id="btn1" type="button" value="실행" />
        <br />
        
        <br />
        
        <select id="lprod" name="lprod"></select>
        
        <select id="prod" name="prod"></select>
        
        <div id="result1"></div>
        
        <hr color="red" />
	
	</body>
</html>


[코드 리팩토링]

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="ko">
	<head>
		<meta charset="UTF-8" />
        <meta name="author" content="LeeGJ" />
        <meta name="copyright" content="대덕인재개발원" />
        <meta name="description" content="Ajax05" />
        <meta name="keywords" content="대덕인재개발원, html, Ajax05" />
        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
        <title>Ajax05</title>
        <link href="../css/style07.css" rel="stylesheet" />
        <script src="../js/jquery-3.7.1.min.js"></script>
        <style>
            div, form {
                border: 3px dotted yellowgreen;
                margin: 20px;
                padding: 20px;
                font-size: 1.2rem;
                word-break: break-all;
            }
            input[type=button],
            button[type=button] {
                display: inline-block;
                padding: 5px 10px;
                text-align: center;
                font-size: 1.2em;
                font-weight: 700;
                background-color: blue;
                color: white;
                border: none;
                border-radius: 4px;
                margin-right: 10px;
                cursor: pointer;
            }
            #result1 table {
            	width: 100%;
            }
            #result1 th {
            	width: 50%;
            }
        </style>
        <script>
            
            $(function(){
            	
            	function selectProdByPid(){
            		var selId = $("#prod").val();
            		console.log(selId);
            		
            		$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                		type : "post",
                		data : {"selId" : selId},
                		success : function(res){
                			//if(res.res == "ok"){
                			if(res.res != "no"){
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th>항목</th>";
                				code += "<th>내용</th>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_ID</td>";
                				//code += "<td>"+ res.id +"</td>";
                				code += "<td>"+ res.prod_id +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_NAME</td>";
                				//code += "<td>"+ res.name +"</td>";
                				code += "<td>"+ res.prod_name +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_LGU</td>";
                				//code += "<td>"+ res.lgu +"</td>";
                				code += "<td>"+ res.prod_lgu +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_BUYER</td>";
                				//code += "<td>"+ res.buyer +"</td>";
                				code += "<td>"+ res.prod_buyer +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_COST</td>";
                				//code += "<td>"+ res.cost +"</td>";
                				code += "<td>"+ res.prod_cost +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_PRICE</td>";
                				//code += "<td>"+ res.price +"</td>";
                				code += "<td>"+ res.prod_price +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_SALE</td>";
                				//code += "<td>"+ res.sale +"</td>";
                				code += "<td>"+ res.prod_sale +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_OUTLINE</td>";
                				//code += "<td>"+ res.outline +"</td>";
                				code += "<td>"+ res.prod_outline +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_DETAIL</td>";
                				//code += "<td>"+ res.detail +"</td>";
                				code += "<td>"+ res.prod_detail +"</td>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                			}else {
                				// alert("일치하는 데이터가 없습니다.");
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th colspan='2'>데이터가 없습니다...</th>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                				return false;
                			}
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
            	}
            	
            	$.ajax({
                	url : "<%= request.getContextPath() %>/selectLprod.do",
                	type : "get",
                	success : function(res){
                		
                		if(res == null || res == ""){
            				// console.log("selectLprod res가 비었습니다...");
                			var code = "<option value='0'>데이터가 없습니다</option>";
                			$("#lprod").append(code);
            			}else {
            				// console.log("selectLprod res가 있습니다...");
            				var code = "";
                    		$.each(res, function(i, v){
                    			//code += "<option value="+ v.gu +">"+ v.nm +"</option>";
                    			code += "<option value="+ v.lprod_gu +">"+ v.lprod_nm +"</option>";
                    		})
                    		// console.log(code);
                    		
                    		$("#lprod").append(code);
            			}
                		
                	},
                	error : function(xhr){
                		alert("상태 : " + xhr.status);
                	},
                	dataType : "json"
                });
            	
                $(window).on("load", function(){
                	
                	var selGu = $("#lprod").val();
                	console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			
                			if(res == null || res == ""){
                				// console.log("selectProdByLgu res가 비었습니다...");
                				var code = "<option value='0'>데이터가 없습니다</option>";
                				$("#prod").append(code);
                			}else {
                				// console.log("selectProdByLgu res가 있습니다...");
                				var code = "";
                    			
                        		$.each(res, function(i, v){
                        			if(i == 0) {
                        				//code += "<option value="+ v.id +" selected>"+ v.name +"</option>";
                        				code += "<option value="+ v.prod_id +" selected>"+ v.prod_name +"</option>";
                        			}else{
                        				//code += "<option value="+ v.id +">"+ v.name +"</option>";
                        				code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                        			}
                        		})
                        		
                        		//console.log(code);
                        		
                        		$("#prod").append(code);
                			}
                    		
                    		selectProdByPid();
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                /* $(document).on("click", "#lprod", function(){
                	alert($("option:selected", this).val());
                }); */
                
                $(document).on("change", "#lprod", function(){
                	
                	$("#prod").empty();
                	$("#result1").empty();
                	
                	var selGu = $(this).val();
                	//console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			
                			if(res == null || res == ""){
                				// console.log("selectProdByLgu res가 비었습니다...");
                				var code = "<option value='0'>데이터가 없습니다</option>";
                        		
                        		$("#prod").append(code);
                			}else {
                				// console.log("selectProdByLgu res가 있습니다...");
                				var code = "";
                        		$.each(res, function(i, v){
                        			// code += "<option value="+ v.id +">"+ v.name +"</option>";
                        			code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                        		})
                        		//console.log(code);
                        		
                        		$("#prod").append(code);
                			}
                    		
                    		var selId = $("#prod").val();
                    		console.log(selId);
                    		
                    		$.ajax({
                        		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                        		type : "post",
                        		data : {"selId" : selId},
                        		success : function(res){
                        			//if(res.res == "ok"){
                        			if(res.res != "no"){
                        				var code = "<table border='1'>";
                        				code += "<tr>";
                        				code += "<th>항목</th>";
                        				code += "<th>내용</th>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_ID</td>";
                        				//code += "<td>"+ res.id +"</td>";
                        				code += "<td>"+ res.prod_id +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_NAME</td>";
                        				//code += "<td>"+ res.name +"</td>";
                        				code += "<td>"+ res.prod_name +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_LGU</td>";
                        				//code += "<td>"+ res.lgu +"</td>";
                        				code += "<td>"+ res.prod_lgu +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_BUYER</td>";
                        				//code += "<td>"+ res.buyer +"</td>";
                        				code += "<td>"+ res.prod_buyer +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_COST</td>";
                        				//code += "<td>"+ res.cost +"</td>";
                        				code += "<td>"+ res.prod_cost +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_PRICE</td>";
                        				//code += "<td>"+ res.price +"</td>";
                        				code += "<td>"+ res.prod_price +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_SALE</td>";
                        				//code += "<td>"+ res.sale +"</td>";
                        				code += "<td>"+ res.prod_sale +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_OUTLINE</td>";
                        				//code += "<td>"+ res.outline +"</td>";
                        				code += "<td>"+ res.prod_outline +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_DETAIL</td>";
                        				//code += "<td>"+ res.detail +"</td>";
                        				code += "<td>"+ res.prod_detail +"</td>";
                        				code += "</tr>";
                        				code += "</table>";
                        				
                        				$("#result1").append(code);
                        			}else {
                        				//alert("일치하는 데이터가 없습니다.");
                        				var code = "<table border='1'>";
		                				code += "<tr>";
		                				code += "<th colspan='2'>데이터가 없습니다...</th>";
		                				code += "</tr>";
		                				code += "</table>";
		                				
		                				$("#result1").append(code);
                        				return false;
                        			}
                        		},
                        		error : function(xhr){
                        			alert("상태 : " + xhr.status);
                        		},
                        		dataType : "json"
                        	});
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                $(document).on("change", "#prod", function(){
                	
                	$("#result1").empty();
                	
                	var selId = $(this).val();
                	console.log(selId);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                		type : "post",
                		data : {"selId" : selId},
                		success : function(res){
                			//if(res.res == "ok"){
                			if(res.res != "no"){
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th>항목</th>";
                				code += "<th>내용</th>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_ID</td>";
                				//code += "<td>"+ res.id +"</td>";
                				code += "<td>"+ res.prod_id +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_NAME</td>";
                				//code += "<td>"+ res.name +"</td>";
                				code += "<td>"+ res.prod_name +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_LGU</td>";
                				//code += "<td>"+ res.lgu +"</td>";
                				code += "<td>"+ res.prod_lgu +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_BUYER</td>";
                				//code += "<td>"+ res.buyer +"</td>";
                				code += "<td>"+ res.prod_buyer +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_COST</td>";
                				//code += "<td>"+ res.cost +"</td>";
                				code += "<td>"+ res.prod_cost +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_PRICE</td>";
                				//code += "<td>"+ res.price +"</td>";
                				code += "<td>"+ res.prod_price +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_SALE</td>";
                				//code += "<td>"+ res.sale +"</td>";
                				code += "<td>"+ res.prod_sale +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_OUTLINE</td>";
                				//code += "<td>"+ res.outline +"</td>";
                				code += "<td>"+ res.prod_outline +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_DETAIL</td>";
                				//code += "<td>"+ res.detail +"</td>";
                				code += "<td>"+ res.prod_detail +"</td>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                			}else {
                				//alert("일치하는 데이터가 없습니다.");
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th colspan='2'>데이터가 없습니다...</th>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                				return false;
                			}
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                });
                
            });
            
        </script>
	</head>
	<body>
	
		<hr color="red" /> 
        
        <h1>
            lprod.jsp
            <br />
            public List&lt;LprodVO&gt; selectLprod();
            <br />
            public List&lt;ProdVO&gt; selectByLgu(String lgu);
            <br />
            public ProdVO selectByIdDetail(String pId);
            <br />
            작업 순서 => VO 만들기, interface 만들기(ILprodDao, ILprodService, IProdDao, IProdService), 
            <br />
            class 만들기(LprodDaoImpl, LProdService, ProdDaoImpl, ProdServiceImpl), 
            <br />
            config설정 - vo typeAlias 설정, mapper 등록
            <br />
            mapper 만들기, controller 만들기, view 만들기, 클라이언트 만들기
            <br />
            select * from lprod;
            <br />
			select prod_id, prod_name from prod where prod_lgu = 'P101';
            <br />
			select * from prod where prod_id = 'P101000001';
        </h1>
        
        <br />
        <input id="btn1" type="button" value="실행" />
        <br />
        
        <br />
        
        <select id="lprod" name="lprod"></select>
        
        <select id="prod" name="prod"></select>
        
        <div id="result1"></div>
        
        <hr color="red" />
	
	</body>
</html>


[BootStrap 적용]

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="ko">
	<head>
		<meta charset="UTF-8" />
        <meta name="author" content="LeeGJ" />
        <meta name="copyright" content="대덕인재개발원" />
        <meta name="description" content="Ajax05" />
        <meta name="keywords" content="대덕인재개발원, html, Ajax05" />
        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
        <title>Ajax05</title>
        <link href="../css/style07.css" rel="stylesheet" />
        <script src="../js/jquery-3.7.1.min.js"></script>
        <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
  		<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
        <style>
            div, form {
                border: 3px dotted yellowgreen;
                margin: 20px;
                padding: 20px;
                font-size: 1.2rem;
                word-break: break-all;
            }
            input[type=button],
            button[type=button] {
                display: inline-block;
                padding: 5px 10px;
                text-align: center;
                font-size: 1.2em;
                font-weight: 700;
                background-color: blue;
                color: white;
                border: none;
                border-radius: 4px;
                margin-right: 10px;
                cursor: pointer;
            }
            #result1 table {
            	width: 100%;
            }
            #result1 th {
            	width: 50%;
            }
        </style>
        <script>
            
            $(function(){
            	
            	function selectProdByPid(){
            		var selId = $("#prod").val();
            		console.log(selId);
            		
            		$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                		type : "post",
                		data : {"selId" : selId},
                		success : function(res){
                			//if(res.res == "ok"){
                			if(res.res != "no"){
                				var code = "<table class='table table-dark table-hover' border='1'>";
                				code += "<tr>";
                				code += "<th>항목</th>";
                				code += "<th>내용</th>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_ID</td>";
                				//code += "<td>"+ res.id +"</td>";
                				code += "<td>"+ res.prod_id +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_NAME</td>";
                				//code += "<td>"+ res.name +"</td>";
                				code += "<td>"+ res.prod_name +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_LGU</td>";
                				//code += "<td>"+ res.lgu +"</td>";
                				code += "<td>"+ res.prod_lgu +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_BUYER</td>";
                				//code += "<td>"+ res.buyer +"</td>";
                				code += "<td>"+ res.prod_buyer +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_COST</td>";
                				//code += "<td>"+ res.cost +"</td>";
                				code += "<td>"+ res.prod_cost +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_PRICE</td>";
                				//code += "<td>"+ res.price +"</td>";
                				code += "<td>"+ res.prod_price +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_SALE</td>";
                				//code += "<td>"+ res.sale +"</td>";
                				code += "<td>"+ res.prod_sale +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_OUTLINE</td>";
                				//code += "<td>"+ res.outline +"</td>";
                				code += "<td>"+ res.prod_outline +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_DETAIL</td>";
                				//code += "<td>"+ res.detail +"</td>";
                				code += "<td>"+ res.prod_detail +"</td>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                			}else {
                				// alert("일치하는 데이터가 없습니다.");
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th colspan='2'>데이터가 없습니다...</th>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                				return false;
                			}
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
            	}
            	
            	$.ajax({
                	url : "<%= request.getContextPath() %>/selectLprod.do",
                	type : "get",
                	success : function(res){
                		
                		if(res == null || res == ""){
            				// console.log("selectLprod res가 비었습니다...");
                			var code = "<option value='0'>데이터가 없습니다</option>";
                			$("#lprod").append(code);
            			}else {
            				// console.log("selectLprod res가 있습니다...");
            				var code = "";
                    		$.each(res, function(i, v){
                    			//code += "<option value="+ v.gu +">"+ v.nm +"</option>";
                    			code += "<option value="+ v.lprod_gu +">"+ v.lprod_nm +"</option>";
                    		})
                    		// console.log(code);
                    		
                    		$("#lprod").append(code);
                    		$("#lprod").trigger('change');
            			}
                		
                	},
                	error : function(xhr){
                		alert("상태 : " + xhr.status);
                	},
                	dataType : "json"
                });
            	
                $(window).on("load", function(){
                	
                	var selGu = $("#lprod").val();
                	console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			
                			if(res == null || res == ""){
                				// console.log("selectProdByLgu res가 비었습니다...");
                				var code = "<option value='0'>데이터가 없습니다</option>";
                				$("#prod").append(code);
                			}else {
                				// console.log("selectProdByLgu res가 있습니다...");
                				var code = "";
                    			
                        		$.each(res, function(i, v){
                        			if(i == 0) {
                        				//code += "<option value="+ v.id +" selected>"+ v.name +"</option>";
                        				code += "<option value="+ v.prod_id +" selected>"+ v.prod_name +"</option>";
                        			}else{
                        				//code += "<option value="+ v.id +">"+ v.name +"</option>";
                        				code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                        			}
                        		})
                        		
                        		//console.log(code);
                        		
                        		$("#prod").append(code);
                        		$("#prod").trigger('change');
                			}
                    		
                    		selectProdByPid();
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                /* $(document).on("click", "#lprod", function(){
                	alert($("option:selected", this).val());
                }); */
                
                $(document).on("change", "#lprod", function(){
                	
                	$("#prod").empty();
                	$("#result1").empty();
                	
                	var selGu = $(this).val();
                	//console.log(selGu);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByLgu.do",
                		type : "post",
                		data : {"selGu" : selGu},
                		success : function(res){
                			
                			if(res == null || res == ""){
                				// console.log("selectProdByLgu res가 비었습니다...");
                				var code = "<option value='0'>데이터가 없습니다</option>";
                        		
                        		$("#prod").append(code);
                			}else {
                				// console.log("selectProdByLgu res가 있습니다...");
                				var code = "";
                        		$.each(res, function(i, v){
                        			// code += "<option value="+ v.id +">"+ v.name +"</option>";
                        			code += "<option value="+ v.prod_id +">"+ v.prod_name +"</option>";
                        		})
                        		//console.log(code);
                        		
                        		$("#prod").append(code);
                			}
                    		
                    		var selId = $("#prod").val();
                    		console.log(selId);
                    		
                    		$.ajax({
                        		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                        		type : "post",
                        		data : {"selId" : selId},
                        		success : function(res){
                        			//if(res.res == "ok"){
                        			if(res.res != "no"){
                        				var code = "<table class='table table-dark table-hover' border='1'>";
                        				code += "<tr>";
                        				code += "<th>항목</th>";
                        				code += "<th>내용</th>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_ID</td>";
                        				//code += "<td>"+ res.id +"</td>";
                        				code += "<td>"+ res.prod_id +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_NAME</td>";
                        				//code += "<td>"+ res.name +"</td>";
                        				code += "<td>"+ res.prod_name +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_LGU</td>";
                        				//code += "<td>"+ res.lgu +"</td>";
                        				code += "<td>"+ res.prod_lgu +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_BUYER</td>";
                        				//code += "<td>"+ res.buyer +"</td>";
                        				code += "<td>"+ res.prod_buyer +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_COST</td>";
                        				//code += "<td>"+ res.cost +"</td>";
                        				code += "<td>"+ res.prod_cost +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_PRICE</td>";
                        				//code += "<td>"+ res.price +"</td>";
                        				code += "<td>"+ res.prod_price +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_SALE</td>";
                        				//code += "<td>"+ res.sale +"</td>";
                        				code += "<td>"+ res.prod_sale +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_OUTLINE</td>";
                        				//code += "<td>"+ res.outline +"</td>";
                        				code += "<td>"+ res.prod_outline +"</td>";
                        				code += "</tr>";
                        				code += "<tr>";
                        				code += "<td>PROD_DETAIL</td>";
                        				//code += "<td>"+ res.detail +"</td>";
                        				code += "<td>"+ res.prod_detail +"</td>";
                        				code += "</tr>";
                        				code += "</table>";
                        				
                        				$("#result1").append(code);
                        			}else {
                        				//alert("일치하는 데이터가 없습니다.");
                        				var code = "<table border='1'>";
		                				code += "<tr>";
		                				code += "<th colspan='2'>데이터가 없습니다...</th>";
		                				code += "</tr>";
		                				code += "</table>";
		                				
		                				$("#result1").append(code);
                        				return false;
                        			}
                        		},
                        		error : function(xhr){
                        			alert("상태 : " + xhr.status);
                        		},
                        		dataType : "json"
                        	});
                    		
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                	
                });
                
                $(document).on("change", "#prod", function(){
                	
                	$("#result1").empty();
                	
                	var selId = $(this).val();
                	console.log(selId);
                	
                	$.ajax({
                		url : "<%= request.getContextPath() %>/selectProdByPid.do",
                		type : "post",
                		data : {"selId" : selId},
                		success : function(res){
                			//if(res.res == "ok"){
                			if(res.res != "no"){
                				var code = "<table class='table table-dark table-hover' border='1'>";
                				code += "<tr>";
                				code += "<th>항목</th>";
                				code += "<th>내용</th>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_ID</td>";
                				//code += "<td>"+ res.id +"</td>";
                				code += "<td>"+ res.prod_id +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_NAME</td>";
                				//code += "<td>"+ res.name +"</td>";
                				code += "<td>"+ res.prod_name +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_LGU</td>";
                				//code += "<td>"+ res.lgu +"</td>";
                				code += "<td>"+ res.prod_lgu +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_BUYER</td>";
                				//code += "<td>"+ res.buyer +"</td>";
                				code += "<td>"+ res.prod_buyer +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_COST</td>";
                				//code += "<td>"+ res.cost +"</td>";
                				code += "<td>"+ res.prod_cost +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_PRICE</td>";
                				//code += "<td>"+ res.price +"</td>";
                				code += "<td>"+ res.prod_price +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_SALE</td>";
                				//code += "<td>"+ res.sale +"</td>";
                				code += "<td>"+ res.prod_sale +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_OUTLINE</td>";
                				//code += "<td>"+ res.outline +"</td>";
                				code += "<td>"+ res.prod_outline +"</td>";
                				code += "</tr>";
                				code += "<tr>";
                				code += "<td>PROD_DETAIL</td>";
                				//code += "<td>"+ res.detail +"</td>";
                				code += "<td>"+ res.prod_detail +"</td>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                			}else {
                				//alert("일치하는 데이터가 없습니다.");
                				var code = "<table border='1'>";
                				code += "<tr>";
                				code += "<th colspan='2'>데이터가 없습니다...</th>";
                				code += "</tr>";
                				code += "</table>";
                				
                				$("#result1").append(code);
                				return false;
                			}
                		},
                		error : function(xhr){
                			alert("상태 : " + xhr.status);
                		},
                		dataType : "json"
                	});
                });
                
                
                
            });
            
        </script>
	</head>
	<body>
	
		<hr color="red" /> 
        
        <h1>
            lprod.jsp
            <br />
            public List&lt;LprodVO&gt; selectLprod();
            <br />
            public List&lt;ProdVO&gt; selectByLgu(String lgu);
            <br />
            public ProdVO selectByIdDetail(String pId);
            <br />
            작업 순서 => VO 만들기, interface 만들기(ILprodDao, ILprodService, IProdDao, IProdService), 
            <br />
            class 만들기(LprodDaoImpl, LProdService, ProdDaoImpl, ProdServiceImpl), 
            <br />
            config설정 - vo typeAlias 설정, mapper 등록
            <br />
            mapper 만들기, controller 만들기, view 만들기, 클라이언트 만들기
            <br />
            select * from lprod;
            <br />
			select prod_id, prod_name from prod where prod_lgu = 'P101';
            <br />
			select * from prod where prod_id = 'P101000001';
        </h1>
        
        <br />
        <input id="btn1" type="button" value="실행" />
        <br />
        
        <br />
        
        <label for="lprod" class="form-label">lprod list</label>
        <select class="form-select" id="lprod" name="lprod"></select>
        
        <label for="prod" class="form-label">prod list</label>
        <select class="form-select" id="prod" name="prod"></select>
        
        <div id="result1"></div>
        
        <hr color="red" />
	
	</body>
</html>

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