※ SimpleFormController
그림1) SimpleFormController의 처리 과정
그림2) sessionForm 프로퍼티가 true인 경우, 커맨드 객체를 HttpSesstion에 저장
■ formBackingObject()메서드
- 커맨드 객체 기본 값 처리 : HTTP GET 요청이 들어오거나 POST요청이 들어오는 경우 formBackingObject() 메서드를 호출하여 커맨드 객체를 생성
- POST 요청인 경우에는 요청 파라미터 값을 생성된 커맨드 객체에 반영한 뒤 폼 전송 요청을 처리
- formBackingObject() 메서드가 생성한 커맨드 객체는 HTTP GET요청이나 POST 요청인 경우 모두 뷰에 전달되어 사용될 수 있다. 따라서 폼을 출력할 때 기본 값을 출력해 주어야 한다면 해당 메서드를 오버라이딩 하면 됨
■ onSubmit()메서드
- POST 요청의 처리
|
package bean;
public class UserBean {
String userId;
String passWord;
String userName;
String address;
String nickName;
//get, set 생략
......
@Override
public String toString() {
return "UserBean [address=" + address + ", nickName=" + nickName
+ ", passWord=" + passWord + ", userId=" + userId
+ ", userName=" + userName + "]";
}
} |
|
package controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import bean.UserBean;
public class UserSimpleFormController extends SimpleFormController {
@Override
protected Object formBackingObject(HttpServletRequest request) throws Exception {
// TODO Auto-generated method stub
System.out.println("<<<<< formBackingObject >>>>>");
System.out.println("request method = " + request.getMethod());
UserBean userBean = new UserBean();;
if(request.getMethod().equals("GET")){ //GET
userBean.setUserId("ID 입력");
userBean.setPassWord("password 입력");
userBean.setUserName("Name 입력");
userBean.setAddress("Address 입력");
}else{ //POST
userBean.setNickName("위대한 탄생");
}
return userBean;
}
@Override
protected ModelAndView onSubmit(HttpServletRequest request,
HttpServletResponse response, Object command, BindException errors)
throws Exception {
// TODO Auto-generated method stub
System.out.println("<<<<< onSubmit >>>>>");
//로직구현
UserBean userBean = (UserBean)command;
System.out.println("param print : " + userBean.toString());
try{
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName(getSuccessView());
modelAndView.addObject("userBean", userBean);
//throw new Exception();
return modelAndView;
}catch(Exception e){
System.out.println("Exception => " + e.toString());
return showForm(request, response, errors);
}
}
} |
|
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- HandlerMapping -->
<bean id="simpleUrlHandlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/userReg.sp">userSimpleFormController</prop>
</props>
</property>
</bean>
<!-- ViewResolver -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass">
<value>org.springframework.web.servlet.view.JstlView</value>
</property>
<property name="prefix">
<value>jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="userSimpleFormController" class="controller.UserSimpleFormController">
<property name="commandClass" value="bean.UserBean"></property>
<property name="commandName" value="userBean"></property>
<property name="formView" value="userReg"></property>
<property name="successView" value="userRegSuccess"></property>
</bean>
</beans> |
userReg.jsp
|
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page session="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@page import="bean.UserBean"%>
<html>
<head>
<title>User Reg Page</title>
<%
UserBean userBean = (UserBean)request.getAttribute("userBean");
System.out.println("jsp print : " + userBean.toString());
%>
</head>
<body>
<div align="center">
<h2>회원 가입</h2>
<form action="userReg.sp" method="post">
<table border="1">
<tr height="30px">
<td>ID</td>
<td>
<input type="text" name="userId" value=""/>
</td>
</tr>
<tr height="30px">
<td>PW</td>
<td>
<input type="password" name="passWord" value=""/>
</td>
</tr>
<tr height="30px">
<td>성명</td>
<td>
<input type="text" name="userName" value=""/>
</td>
</tr>
<tr height="30px">
<td>주소</td>
<td>
<input type="text" name="address" value=""/>
</td>
</tr>
</table>
<table>
<tr>
<td><input type="submit" name="submit" value="reg"></input></td>
<td><input type="reset" name="reset" value="reset"></input></td>
</tr>
</table>
</form>
</div>
</body>
</html> |
userRegSuccess.jsp
|
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page session="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<html>
<head>
<title>User Reg Page</title>
</head>
<body>
<div align="center">
<c:out value="${userBean.userName}"></c:out> 님.<br>
회원가입을 진심으로 축하드립니다.
</div>
</body>
</html> |
log 출력
◆GET 방식일 경우
<<<<< formBackingObject >>>>>
request method = GET
jsp print : UserBean [address=Address 입력, nickName=null, passWord=password 입력, userId=ID 입력, userName=Name 입력]
◆POST 방식일 경우
<<<<< formBackingObject >>>>>
request method = POST
<<<<< onSubmit >>>>>
param print : UserBean [address=서울 관악, nickName=위대한 탄생, passWord=123, userId=snoopy, userName=스누피] |
onSubmit()메소드에서 Exception 발생 시 showForm(request, response, errors) 리턴 => userReg.jsp
[참고자료] 스프링 2.5 프로그래밍 (최범균)
