Bean(DTO) 객체의 활용
데이터를 담아서 전송하는 객체를 활용한 정보 입력 및 전달
예제)
com.baen>PersonInfo.java
package com.bean;
public class PersonInfo {
private String name;
private String gender;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
com.controller>PersonController.java
package com.controller;
import java.io.IOException;
import java.io.PrintWriter;
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 com.bean.PersonInfo;
@WebServlet({ "/pInput", "/update" })
public class PersonController extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doProcess(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doProcess(request, response);
}
private void doProcess(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String command = request.getServletPath();
PersonInfo pInfo = null;
if(command.equals("/pInput")) {
pInfo = (PersonInfo)request.getAttribute("pInfo");
System.out.println("이름 : " + pInfo.getName());
pInfo = (PersonInfo)request.getAttribute("pInfo");
System.out.println("성별 : " + pInfo.getGender());
pInfo = (PersonInfo)request.getAttribute("pInfo");
System.out.println("나이 : " + pInfo.getAge());
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>입력결과</title>");
out.println("</head>");
out.println("<body>");
out.println("<h2>입력 완료</h2>");
out.println("<a href='index.jsp'>시작으로</a>");
out.println("</body>");
out.println("</html>");
} else if(command.equals("/update")) {
pInfo = new PersonInfo();
pInfo.setName("홍길동");
pInfo.setGender("남자");
pInfo.setAge(25);
request.setAttribute("uInfo", pInfo);
RequestDispatcher dis = request.getRequestDispatcher("pUpdate.jsp");
dis.forward(request, response);
}
}
}
doProcess 메소드에서는 input(회원가입)으로 들어왔는지, update(수정)들어왔는지 구분해서 처리해야함.
request.getServletPath();를 통해 어떤 서블릿을 통해서 가야하는지를 구해야함.
입력받은 결과가 /pInput(회원가입)을 통해 들어왔다면 내용 확인을 위해 입력받은 내용을 콘솔에 출력해준다.
service → DAO → DB 순서로 DB에 입력처리한다.
입력받은 결과가 /update를 통해 들어왔다면 DB에서 해당 key로 검색한 정보를 가져와서 jsp 페이지로 전달.
여기서는 임의의 데이터를 전달함.
pInputFrm.jsp
<h2>회원 정보 입력</h2>
<form action="inProc.jsp" method="post">
<!-- 이름, 성별, 나이를 입력하도록 작성해 주세요. -->
<table>
<tr>
<th width="100px">이름</th>
<td width="200px"><input type="text" name="name"></td>
</tr>
<tr>
<th>성별</th>
<td width="200px"><input type="text" name="gender"></td>
</tr>
<tr>
<th>나이</th>
<td width="200px"><input type="text" name="age"></td>
</tr>
<tr>
<td colspan="2" style="text-align: center">
<input type="submit" value="전송">
<input type="reset" value="취소">
</td>
</tr>
</table>
</form>
회원 정보를 입력 받는 페이지 생성.
pUpdate.jsp
<h3>검색한 회원</h3>
<form action="inProc.jsp" method="post">
<table>
<tr>
<th width="100px">이름 : </th>
<td width="200px">
<input type="text" name="name" value="${uInfo.name}">
</td>
</tr>
<tr>
<th>성별 : </th>
<td width="200px">
<input type="text" name="gender" value="${uInfo.gender}">
</td>
</tr>
<tr>
<th>나이 : </th>
<td width="200px">
<input type="text" name="age" value="${uInfo.age}">
</td>
</tr>
<tr>
<td colspan="2" style="text-align: center">
<input type="submit" value="전송">
<input type="reset" value="취소">
</td>
</tr>
</table>
</form>
<a href="index.jsp">시작으로</a>
저장된 회원 정보를 확인하는 페이지 생성.
inProc.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
%>
<jsp:useBean id="pInfo" class="com.bean.PersonInfo" scope="request"/>
<jsp:setProperty property="*" name="pInfo"/>
<jsp:forward page="/pInput"/>PersonInfo DTO의 이름을 pInfo로 설정하고 DB 사용함.