웹 프로그래밍/Web

[Web] 3. MVC 패턴(2) - Main과 Param 동작방식

코딩하는 문과생 2020. 1. 30. 11:49

[Preview]

전체 흐름 & 해당 글 부분

[tomcat은 index.jsp를 먼저 찾는다.]

  1. webapp아래 index.jsp 생성
  2. http://127.0.0.1:8088/incWEB/ 접속
  3. Tomcat은 index.jsp를 먼저 찾는다.

[index.jsp 수정]

 루트로 접근하면 main.inc로 리다이렉트 된다.
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

<script type="text/javascript">
	location.href = "main.inc";
</script>

[main ctrl 생성]

package com.sinc.intern.main.ctrl;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.sinc.intern.util.Controller;
import com.sinc.intern.view.util.ModelAndView;

public class MainCtrl implements Controller{
	@Override
	public ModelAndView execute(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		System.out.println("MainCtrl execute");
		return new ModelAndView(true, "main.jsp");
	}
}

[main.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">웹 프레임워크 by ㅋㅋㅋ</div>
	<hr/>
	
	Post :: <br/>
	<form action="parameter.inc" method="post">
		<input type="text"  name="msg" id="msg">
		<input type="submit"  value="이벤트">
	</form>
	
	Get :: <br/>
	<a href = "parameter.inc?msg=sijune">링크</a>
	<!-- a태그는 무조건 get방식 -->
</body>
</html>

127.0.0.1:8088/incWEB/ 입력해도 main.inc로 리디렉션된다. 그러나 에러

[BeanFactory로 MainCtrl생성 ]

private BeanFactory() {
		map.put("/incWEB/main.inc", new MainCtrl());
		map.put("/incWEB/insert.inc", new InsertCtrl());
		map.put("/incWEB/select.inc", new SelectCtrl());
	}

- Get방식 & Post방식 확인하기

[ParamCtrl 생성]

public class ParamCtrl implements Controller{
	@Override
	public ModelAndView execute(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		
		return null;
	}
}

[BeanFactory 추가]

	private BeanFactory() {
		map.put("/incWEB/main.inc", new MainCtrl());
		map.put("/incWEB/parameter.inc", new ParamCtrl());
		map.put("/incWEB/insert.inc", new InsertCtrl());
		map.put("/incWEB/select.inc", new SelectCtrl());
	}

[ParamCtrl 수정]

request 요청정보 확인
public class ParamCtrl implements Controller{
	@Override
	public ModelAndView execute(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		//request에 요청정보가 들어온다.
		System.out.println("method : " + request.getMethod());
		
        //유효성 체크도 가능하지만, 보통 front에서 처리한다.
        request.setCharacterEncoding("utf-8");
		String msg = request.getParameter("msg");
		System.out.println("Param result : " +  msg);
		
		return new ModelAndView(true, "greeting.jsp");
	}
}

 

get방식

 

post방식