Spring MVC - 회원가입 페이지 만들기2

form 데이터 전송 방법 중 GET 방식 막기

 

//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save() {
		return "registerInfo";
	}
}

 

@GetMapping 추가

package com.fastcampus.app;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {
	
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}
	
//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save() {
		return "registerInfo";
	}
}

 

 

이제 Get 방식으로 요청해도 안된다

 

 

@GetMapping 대신 view-controller 사용하기

 

servlet-context.xml 에 코드 추가

<view-controller path="/register/add" view-name="registerForm"/>

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:beans="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

	<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
	
	<!-- Enables the Spring MVC @Controller programming model -->
	<annotation-driven />

	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
	<resources mapping="/**" location="/resources/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>
	
   
	<context:component-scan base-package="com.fastcampus.app" />
	
	
	
</beans:beans>

 

mvc 스키마는 생략한 상태

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:beans="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd
		http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

	<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
	
	<!-- Enables the Spring MVC @Controller programming model -->
	<mvc:annotation-driven />

	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
	<mvc:resources mapping="/**" location="/resources/" />

	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>
    
	<mvc:view-controller path="/register/add" view-name="registerForm"/>
	<context:component-scan base-package="com.fastcampus.app" />
	
	
	
</beans:beans>

 

 

유효성 검사

 

msg 를 그대로 브라우저에 보내면 깨지기 때문에 URLEncoder 를 사용하자

package com.fastcampus.app;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {
	
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}
	
//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save(User user, Model m) throws Exception {
		
		// 1. 유효성 검사
		if(!isValid(user)) {
			String msg = URLEncoder.encode("id를 잘못입력하셨습니다.", "utf-8");
			return "redirect:/register/add?msg="+msg; // URL 재작성(rewriting)
		}
		
		
		// 2. DB에 신규회원 정보를 저장
		return "registerInfo";
	}

private boolean isValid(User user) {
	// TODO Auto-generated method stub
	return false;
}
}

 

 

registerForm.jsp 에 msg 를 받는 코드를 추가

<div id="msg" class="msg">${param.msg}</div>

msg 가 출력 되지 않으면 decoder 추가

java.net.URLDecoder, import 해야함

<%@ page import="java.net.URLDecoder" %>

<div id="msg" class="msg">${URLDecoder.decode(param.msg)}</div>

 

 

 

Model 에 저장해서 넘기기

 

model 은 redirect 해서 요청하는 "register/add" 에서는 쓸 수 없고

mapping 한 "register/save" 에서만 사용가능 하다.

 

하지만 이를 Spring 에서 

"redirect:/register/add?msg="+msg;

이런 형태로 만들어 주기 때문에 잘 작동된다.

package com.fastcampus.app;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {
	
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}
	
//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save(User user, Model m) throws Exception {
		
		// 1. 유효성 검사
		if(!isValid(user)) {
			
			String msg = URLEncoder.encode("id를 잘못입력하셨습니다.", "utf-8");
			m.addAttribute("msg", msg);
			
//			return "redirect:/register/add?msg="+msg; // URL 재작성(rewriting)
			return "redirect:/register/add";
		}
		
		
		// 2. DB에 신규회원 정보를 저장
		return "registerInfo";
	}

private boolean isValid(User user) {
	// TODO Auto-generated method stub
	return false;
}
}

 

 

 

이제 isvalid 값을 true 로 바꿔 registerInfo 로 데이터가 잘 들어가는 지 확인하자

 

registerInfo.jsp 의 EL인 param 을 user로 바꾸자

<%@ 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>
<h1>id=${user.id}</h1>
<h1>pwd=${user.pwd}</h1>
<h1>name=${user.name}</h1>
<h1>email=${user.email}</h1>
<h1>birth=${user.birth}</h1>
<h1>sns=${user.sns}</h1>



</body>
</html>

private boolean isValid(User user) {
	// TODO Auto-generated method stub
	return true;
}