struts存取session和application值

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1、index.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><h3>登录页面</h3><form action="myLogin.action" method="post"><table><tr><td>用户名：</td><td><input type="text" name="uname" /></td></tr><tr><td>密码：</td><td><input type="password" name="upwd" /></td></tr><tr><td><input type="submit" value="提交" /></td><td><input type="reset" value="重置" /></td></tr></table></form></body></html>

2、struts.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"        "http://struts.apache.org/dtds/struts-2.5.dtd"><struts><constant name="struts.devMode" value="true"/>    <package name="default" namespace="/" extends="struts-default">    <action name="myLogin" class="action.MyLoginAction">    <result>    /myLoginSuccess.jsp    </result>    <result name="fail">/myLoginFail.jsp</result>    </action>    </package></struts>

3、model包User.java

package model;public class User {public String uname;public String Upwd;public String getUname() {return uname;}public void setUname(String uname) {this.uname = uname;}public String getUpwd() {return Upwd;}public void setUpwd(String upwd) {Upwd = upwd;}}

4、action包MyLoginAction.java

package action;import java.util.Map;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;import model.User;public class MyLoginAction extends ActionSupport implements ModelDriven<User>{private User u = new User();private HttpServletRequest request;private HttpSession session;private ServletContext application;public MyLoginAction() {request = ServletActionContext.getRequest();session = request.getSession();application = ServletActionContext.getServletContext();}public String execute() {if("yjw".equals(u.getUname())&&"123".equals(u.getUpwd())) {session.setAttribute("usersession", u);application.setAttribute("userapplication", u);return SUCCESS;}else{request.setAttribute("userrequest", u);return "fail";}}@Overridepublic User getModel() {return u;}}

5、myLoginSuccess.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=ISO-8859-1"><title>Insert title here</title></head><body>从session中取值<br>用户名：${sessionScope.usersession.uname}<br>密码：${sessionScope.usersession.upwd}<br>从application中取值<br>用户名：${applicationScope.userapplication.uname}<br>密码：${applicationScope.userapplication.upwd}</body></html>

6、myLoginFail.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=ISO-8859-1"><title>Insert title here</title></head><body>从request中取值<br>用户名：${requestScope.userrequest.uname}<br>密码：${requestScope.userrequest.upwd}</body></html>

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