Struts2 中request，session，application三种请求方法
搭建 struts2框架，需要自己来搭建，在这里我所使用的版本是struts2.2.3，版本不影响自己来完成request，session，application三种请求方法
1、在 src下建三个action类：OneRSATestAction、TwoRSATestAction、ThreeRSATestAction
2、在 WebRoot下建一个首页index.jsp和三个结果页面：testOne.jsp、testTwo.jsp、Three.jsp(也可以建一个结果页面，不过为了便于测试结果，在这里建三个页面，因为在struts.xml，本人使用的是通配符作为控制)。
Struts.xml代码：
<?xml version= "1.0" encoding= "UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name= "struts.enable.DynamicMethodInvocation" value= "false" />
<constant name= "struts.devMode" value= "false" />
<package name= "default" namespace= "/" extends= "struts-default">
<action name= "*_*" class= "com.monkey.threeRSA.action.{2}Action" method= "{1}">
<result>/{1}. jsp</result>
</action>
</package>
3、代码填写：
a) OneRSATestAction.java：
package com.monkey.threeRSA.action;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class OneRSATestAction extends ActionSupport {
/**
* 第一种获取 request、session、application的方法
*/
private static final long serialVersionUID = 1L;
private Map request;
private Map session;
private Map application;
public OneRSATestAction()
{
request = (Map)ActionContext.getContext().get("request");
session=ActionContext.getContext().getSession();
application=ActionContext.getContext().getApplication();
}
public String testOne()
{
request.put("r1", "第一种获取 request");
session.put("s1", "第一种获取 session");
application.put("a1", "第一种获取 application");
return SUCCESS;
}
}
b) TwoRSATestAction.java
package com.monkey.threeRSA.action;
import java.util.Map;
import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionSupport;
public class TwoRSATestAction extends ActionSupport implements RequestAware,SessionAware,ApplicationAware {
/**
* 第二种获取 request、session、application的方法
*/
private static final long serialVersionUID = 1L;
private Map<String, Object> request;
private Map<String, Object> session;
private Map<String, Object> application;
public String testTwo()
{
request.put("r2", "第二种获取 request");
session.put("s2", "第二种获取 session");
application.put("a2", "第二种获取 application");
return SUCCESS;
}
public void setRequest(Map<String, Object> request) {
// TODO Auto-generated method stub
this.request=request;
}
public void setSession(Map<String, Object> session) {
// TODO Auto-generated method stub
this.session=session;
}
public void setApplication(Map<String, Object> application) {
// TODO Auto-generated method stub
this.application=application;
}
}
c) ThreeRSATestAction.java
package com.monkey.threeRSA.action;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class ThreeRSATestAction extends ActionSupport {
/**
* 第三种获取 request、session、application的方法
*/
private static final long serialVersionUID = 1L;
private HttpServletRequest request;
private HttpSession session;
private ServletContext application;
public ThreeRSATestAction()
{
request = ServletActionContext. getRequest();
session = request.getSession();
application = session.getServletContext() ;
}
public String testThree()
{
request.setAttribute("r3", "第三种获取 request");
session.setAttribute("s3", "第三种获取 session");
application.setAttribute("a3", "第三种获取 application");
return SUCCESS;
}
}
testOne.jsp
<%@ page language= "java" contentType= "text/html; charset=GBK"
pageEncoding= "GBK"%>
<%@ taglib uri= "/struts-tags" prefix= "s" %>
<!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=GBK">
<title>第一种获取方法</title>
</head>
<body>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=request.getAttribute("r1") %> | <s:property value= "#request.r1"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=session.getAttribute("s1") %> | <s:property value= "#session.s1"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=application.getAttribute("a1") %> | <s:property value= "#application.a1"/></div>
</body>
</html>
testTwo.jsp
<%@ page language= "java" contentType= "text/html; charset=GBK"
pageEncoding= "GBK"%>
<%@ taglib uri= "/struts-tags" prefix= "s" %>
<!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=GBK">
<title>第二种获取方法</title>
</head>
<body>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=request.getAttribute("r2") %> | <s:property value= "#request.r2"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=session.getAttribute("s2") %> | <s:property value= "#session.s2"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=application.getAttribute("a2") %> | <s:property value= "#application.a2"/></div>
</body>
</html>
testThree.jsp
<%@ page language= "java" contentType= "text/html; charset=GBK"
pageEncoding= "GBK"%>
<%@ taglib uri= "/struts-tags" prefix= "s" %>
<!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=GBK">
<title>第三种获取方法</title>
</head>
<body>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=request.getAttribute("r3") %> | <s:property value= "#request.r3"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=session.getAttribute("s3") %> | <s:property value= "#session.s3"/></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><%=application.getAttribute("a3") %> | <s:property value= "#application.a3"/></div>
</body>
</html>
首页代码： index.jsp
<%@ page language= "java" import= "java.util.*" pageEncoding= "GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href= "<%=basePath%> ">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv= "pragma" content= "no-cache">
<meta http-equiv= "cache-control" content= "no-cache">
<meta http-equiv= "expires" content= "0">
<meta http-equiv= "keywords" content= "keyword1,keyword2,keyword3">
<meta http-equiv= "description" content= "This is my page">
<!--
<link rel=" stylesheet" type="text/ css" href="styles.css">
-->
</head>
<body>
<div style= "margin-top:20px; height:30px; font-size:20px;"><a href= "testOne_OneRSATest">第一种获取 request、session、application方法</a></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><a href= "testTwo_TwoRSATest">第二种获取 request、session、application方法</a></div>
<div style= "margin-top:20px; height:30px; font-size:20px;"><a href= "testThree_ThreeRSATest">第三种获取 request、session、application方法</a></div>
</body>
</html>
如果要想参考整个项目下载源代码： ThreeRSA.zip