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MVC패턴 model2 본문

JSP/기본

MVC패턴 model2

투한 2012. 2. 14. 16:47



Servlet 실행 -> 모든 모델 실행뒤 -> request에 담아지고
JSP ->가 request파일 호출










web.xml 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0">
	<display-name>mvcMain</display-name>

<!-- SimpleController start -->
<servlet>
	<servlet-name>SimpleController</servlet-name>
	<servlet-class>kame.chap24.SimpleController</servlet-class>
</servlet>
<servlet-mapping>
	<servlet-name>SimpleController</servlet-name>
	<url-pattern>/simple</url-pattern>
</servlet-mapping>
<!-- SimpleController end -->

	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>


SimpleController.java 
package kame.chap24;

import java.io.IOException;

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

public class SimpleController extends HttpServlet {

	public void doGet(HttpServletRequest request,HttpServletResponse response)
			throws ServletException, IOException{
		processRequest(request,response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)
			throws ServletException, IOException{
		processRequest(request,response);
	}

	private void processRequest(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException{
		//2단계 요청 파악
		//request객체로 부터 사용자의 요청을 파악하는 코드
		String type= request.getParameter("type");
		
		//3단계 요청한 기능을 수행한다
		//사용자에 요청에 따라 알맞은 코드
		Object resultObject = null;
		if(type==null || type.equals("greeting")){
			resultObject = "안녕하세요";
		}else if(type.equals("date")){
			resultObject = new java.util.Date();
		}else{
			resultObject = "Invalid Type";
		}
		
		//4단계 request나 session에 처리 결과를 저장
		request.setAttribute("result", resultObject);
		
		//5단계, RequestDispatcher를 사용하여 알맞은 뷰로 포워딩
		RequestDispatcher dispatcher = request.getRequestDispatcher("/simpleView.jsp");
		dispatcher.forward(request,response);
	}
}


simpleView.jsp 
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
결과 : <%=request.getAttribute("result") %><br/>
결과 : ${result}
</body>
</html>










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