Lprod 동기 / 비동기
LprodDao
package kr.or.ddit.basic.json;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import kr.or.ddit.basic.vo.LprodVO;
import kr.or.ddit.util.DBUtil3;
public class LprodDao {
private static LprodDao dao;
private LprodDao() {}
public static LprodDao getInstance() {
if(dao==null) dao = new LprodDao();
return dao;
}
public List<LprodVO> getLprodList() {
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
List<LprodVO> lprodList = new ArrayList<LprodVO>();
try {
conn = DBUtil3.getConnection();
stmt = conn.createStatement();
String sql = "select * from lprod order by lprod_id ";
rs = stmt.executeQuery(sql);
while(rs.next()) {
LprodVO lvo = new LprodVO();
lvo.setLprod_id(rs.getInt("lprod_id"));
lvo.setLprod_gu(rs.getString("lprod_gu"));
lvo.setLprod_nm(rs.getString("lprod_nm"));
lprodList.add(lvo);
}
} catch (SQLException e) {
lprodList = null;
e.printStackTrace();
}finally {
if(rs!=null)try {rs.close();}catch(SQLException e) {}
if(stmt!=null)try {stmt.close();}catch(SQLException e) {}
if(conn!=null)try {conn.close();}catch(SQLException e) {}
}
return lprodList;
}
}
lprodlist.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>lprod 자료 목록</title>
<script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-3.6.0.min.js"></script>
<script type="text/javascript">
$(function(){
//-------------------------------------
//비동기 방식(같은 페이지 안에서 변경됨)
$("#lprodBtn").on("click", function(){
$.ajax({
url: "<%=request.getContextPath()%>/lprodList.do",
//데이터를 안보내도되서 데이터는 생략됨
type : "post",
success : function(data){
let htmlCode = "<table border='1'>"
htmlCode += "<tr><th>LPROD_ID</th><th>LPROD_GU</th><th>LPROD_NM</th></tr>"
//한줄씩 값 넣어줌
$.each(data, function(i,v){
htmlCode += "<tr><td>" + v.lprod_id + "</td>";
htmlCode += "<td>" + v.lprod_gu + "</td>";
htmlCode += "<td>" + v.lprod_nm + "</td></tr>";
})
htmlCode +="</table>"
$("#result").html(htmlCode);
},
dataType : "json"
});
});
//-------------------------------------------
//동기 방식 처리(주소바뀜)
$("#lprodBtn2").on("click", function(){
location.href="<%=request.getContextPath()%>/lprodList2.do";
});
});
</script>
</head>
<body>
<form action="<%=request.getContextPath() %>/jsonDataTest02.do"
method="get">
<input type ="button" id="lprodBtn" value="Lprod 자료 가져오기(ajax)">
<input type ="button" id="lprodBtn2" value="Lprod 자료 가져오기(non 0ajax)">
</form>
<h2>Lprod 자료 목록</h2>
<div id="result"></div>
</body>
</html>LprodList.java
package kr.or.ddit.basic.json;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
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 com.google.gson.Gson;
import kr.or.ddit.basic.vo.LprodVO;
@WebServlet("/lprodList.do")
public class LprodList extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("application/json; charset=utf-8");
PrintWriter out = response.getWriter();
Gson gson = new Gson();
LprodDao dao = LprodDao.getInstance();
List<LprodVO> lprodList = dao.getLprodList();
String jsonData = gson.toJson(lprodList);
out.write(jsonData);
response.flushBuffer();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
lprodList2.jsp
<%@page import="kr.or.ddit.basic.vo.LprodVO"%>
<%@page import="java.util.List"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%
//서블릿이 보낸 데이터를 받는다.
List<LprodVO> lprodList =
(List<LprodVO>)request.getAttribute("lpList");
%>
<h2>Lprod 자료 목록</h2>
<table border="1">
<tr>
<th>LPROD_ID</th><th>LPROD_GU</th><th>LPROD_NM</th>
</tr>
<%
for(LprodVO lvo : lprodList){
%>
<tr>
<td><%=lvo.getLprod_id() %></td>
<td><%=lvo.getLprod_gu() %></td>
<td><%=lvo.getLprod_nm() %></td>
</tr>
<%
}
%>
</table>
</body>
</html>
LprodList2.java
package kr.or.ddit.basic.json;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
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 com.google.gson.Gson;
import kr.or.ddit.basic.vo.LprodVO;
@WebServlet("/lprodList2.do")
public class LprodList2 extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
LprodDao dao = LprodDao.getInstance();
List<LprodVO> lprodList = dao.getLprodList();
// 처리된 결과 데이터를 JSP문서로 forward방식으로 보낸다.
request.setAttribute("lpList", lprodList);
request.getRequestDispatcher("/json/lprodList2.jsp")
.forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}
Author And Source
이 문제에 관하여(Lprod 동기 / 비동기), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다 https://velog.io/@susan9905/Lprod-동기-비동기저자 귀속: 원작자 정보가 원작자 URL에 포함되어 있으며 저작권은 원작자 소유입니다.
우수한 개발자 콘텐츠 발견에 전념
(Collection and Share based on the CC Protocol.)
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