Back-End/Spring
[Spring] MVC 패턴
찐코딩
2021. 12. 14. 14:07
1.model 형식
2.ModelAndView 형식
ModelAndView 형식
ModelAndView 객체란?
- ModelAndView 객체는 컨트롤러에 의해서 비즈니스 로직이 수행되고 나면 대체적으로 사용자에게 반환되어 브라우저에 보여질 정보들이 만들어진다.
이때 만들어진 정보를 view page로 넘겨주게 되는데 응답을 할 view page 정보와 전달할 데이터를 한꺼번에 저장하여 넘겨줄 때 사용함
Mycontroller.java
package com.sist.mvc01;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class MyController {
@RequestMapping("/info")
public ModelAndView abc() {
ModelAndView mav = new ModelAndView();
//addObject("키","데이터");
mav.addObject("email","hong@naver.com"); // 정보를 ModelAndView에 저장
// setViewName("폴더명/폴더에 들어갈 jsp page");
mav.setViewName("member/email");
return mav;
// 이 return정보가 servlet-context.xml로 넘어감
}
}위에서 member폴더에 email.jsp로 경로와 파일명을 지정해주었으므로,
email.jsp
<%@ 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>
<div align="center">
<h2>홍길동 님의 메일 주소 : ${email }</h2>
</div>
</body>
</html>
MVC2패턴
1. 한글 인코딩 작업
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee https://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 한글 인코딩 설정 작업 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharaterEncodingFilter</filter-class>
<init-param> <!-- 요청에 대한 한글 처리 -->
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param> <!-- 응답에 대한 한글 처리 -->
<param-name>forceEncoding</param-name>
<param-value>true</param-value> <!-- 응답에 대해서도 한글 인코딩을 하겠다. -->
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern> <!-- /뒤에 아무거나 오면 한글 인코딩 처리를 하겠다. -->
</filter-mapping>
</web-app>MyController.java
package com.sist.mvc02;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class MyController {
// input이라는 명령이 들어오면 insertForm이라는 웹 페이지로 이동하라
@RequestMapping("/input")
public String aaa() { // 메서드 이름은 상관없음
return "insertForm";
}
}
@RequestParam 애노테이션을 이용한 방식
MyController.java
@RequestMapping("/login")
public String login() {
return "loginForm";
}login.jsp
<%@ 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>
<div align="center">
<hr width="50%" color="blue">
<h3>입력된 개인 정보</h3>
<hr width="50%" color="blue">
<br><br>
<table border="1" cellspacing="0" width="300">
<tr>
<th>이름</th>
<td>${userName }</td>
</tr>
<tr>
<th>아이디</th>
<td>${userId }</td>
</tr>
</table>
</div>
</body>
</html>loginForm.jsp
<%@ 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>
<div align="center">
<hr width="50%" color="gray">
<h3>로그인 입력 폼 페이지</h3>
<hr width="50%" color="gray">
<br><br>
<form method="post"
action="<%=request.getContextPath() %>/LoginOk">
<table border="1" cellspacin="0" width="300">
<tr>
<th>아이디</th>
<td> <input name="user_id"> </td>
</tr>
<tr>
<th>비밀번호</th>
<td> <input name="user_pwd" type="password"> </td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="로그인">
<input type="reset" value="취소"> </td>
</tr>
</table>
</form>
</div>
</body>
</html>MyController.java
@RequestMapping("/loginOk")
public String loginOk(@RequestParam("user_id") String userId,
@RequestParam("user_pwd") String userPwd,
Model model) {
model.addAttribute("userId",userId);
model.addAttribute("userPwd",userPwd);
return "result";
}형식
@RequestParam("넘어온 키 이름") String 저장할 변수명