Jsp - HttpServlet 기본적인 요청 방법
Posted 05 3, 2009 12:27, Filed under: Language/ㅡ Jsp
# 한번의 광고 클릭으로, 당신을 대신해서 불우이웃을 도울 기회가 많아집니다.
### web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>Webdav Content Management</display-name>
<description>
Webdav Content Management
</description>
<servlet>
<servlet-name>simple</servlet-name>
<servlet-class>jsp.controller.SimpleController</servlet-class>
</servlet>
<servlet>
<servlet-name>actionServlet</servlet-name>
<servlet-class>jsp.controller.ActionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>actionServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file/>
</welcome-file-list>
</web-app>
### Controller
package jsp.controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.*;
public class SimpleController extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{
// 모든 요청과 응답을 processRequest 메소드로 받음
this.processRequest(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{
this.processRequest(request, response);
}
// 사용자 정의 요청을 처리 하는 내부 메소드
private void processRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{
System.out.println("요청 들어옴");
//1. 요청분석
String type = request.getParameter("type");
/**
* ?type=date
* ?type=greeting
* 3.
*/
//2. 요청에 맞는일 수행
Object resultObject = null;
if(type == null){
resultObject ="type == null ";
// equals 에서 type의 값이 null 이면 자동으로 에러
}else if(type.equals("greeting")){
resultObject = "안녕하세요 ~!";
}else if(type.equals("date")){
resultObject = new java.util.Date();
}
//3. 결과를 request에 객체 setAttribute 한다.
request.setAttribute("result", resultObject);
// 4. view(JSP) 선택후에 view 로 forwording......
RequestDispatcher dispatcher = request.getRequestDispatcher("/simpleView.jsp");
dispatcher.forward(request, response);
}
}
### jsp
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
<%
Object result = request.getAttribute("result");
%>
<h1> SimpleController로 부터 받은 데이타 </h1>
<hr>
<!-- toString 이 자동으로 호출됩 -->
<%=result %>
</body>
</html>
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>Webdav Content Management</display-name>
<description>
Webdav Content Management
</description>
<servlet>
<servlet-name>simple</servlet-name>
<servlet-class>jsp.controller.SimpleController</servlet-class>
</servlet>
<servlet>
<servlet-name>actionServlet</servlet-name>
<servlet-class>jsp.controller.ActionServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>actionServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file/>
</welcome-file-list>
</web-app>
### Controller
package jsp.controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.*;
public class SimpleController extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{
// 모든 요청과 응답을 processRequest 메소드로 받음
this.processRequest(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException,IOException{
this.processRequest(request, response);
}
// 사용자 정의 요청을 처리 하는 내부 메소드
private void processRequest(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{
System.out.println("요청 들어옴");
//1. 요청분석
String type = request.getParameter("type");
/**
* ?type=date
* ?type=greeting
* 3.
*/
//2. 요청에 맞는일 수행
Object resultObject = null;
if(type == null){
resultObject ="type == null ";
// equals 에서 type의 값이 null 이면 자동으로 에러
}else if(type.equals("greeting")){
resultObject = "안녕하세요 ~!";
}else if(type.equals("date")){
resultObject = new java.util.Date();
}
//3. 결과를 request에 객체 setAttribute 한다.
request.setAttribute("result", resultObject);
// 4. view(JSP) 선택후에 view 로 forwording......
RequestDispatcher dispatcher = request.getRequestDispatcher("/simpleView.jsp");
dispatcher.forward(request, response);
}
}
### jsp
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
<%
Object result = request.getAttribute("result");
%>
<h1> SimpleController로 부터 받은 데이타 </h1>
<hr>
<!-- toString 이 자동으로 호출됩 -->
<%=result %>
</body>
</html>
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# 한번의 광고 클릭으로, 당신을 대신해서 불우이웃을 도울 기회가 많아집니다.
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