拦截器：interceptor进行身份验证，判断是否是合法用户
1：jsp（登录）
<%@ page contentType="text/html;charset=UTF-8" language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
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>Struts2拦截器的使用</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">
</head>
<body>
<h2>用户登录</h2><hr/>
<font color="red">${requestScope.tip}</font><br/>
<s:form action="login2action" method="post">
<s:textfield name="name" label="用户名"></s:textfield>
<s:password name="pass" label="密码"></s:password>
<s:submit value="登录"></s:submit>
</s:form>
</body>
</html>
2：struts.xml(配置拦截器）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.i18n.encoding" value="UTF-8"></constant>
<package name="struts2login" extends="struts-default">
<action name="login" class="com.test.action.LoginAction">
<result name="success" >/result.jsp</result>
<result name="error">/error.jsp</result>
</action>
<action name="input" class="com.test.action.InputAction">
<result name="success" >/success.jsp</result>
<result name="error">/error.jsp</result>
</action>
<action name="message" class="com.test.action.InputAction">
<result name="success" >/message.jsp</result>
<result name="error">/error.jsp</result>
</action>
</package>
<package name="demo1" extends="struts-default">
<action name="addRegister" class="com.test.action.RegisterAction">
<result name="success">/showRegInfo.jsp</result>
</action>
<action name="addRegister1" class="com.test.action.Register1Action">
<result name="success">/showRegInfo1.jsp</result>
</action>
<action name="convert" class="com.test.action.ConvertAction">
<result name="success">/convertResult.jsp</result>
</action>
</package>
<package name="hellointerceptor" extends="struts-default">
<interceptors>
<interceptor name="helloInterceptor" class="com.test.action.HelloInterceptor">
</interceptor>
</interceptors>
<action name="helloaction" class="com.test.action.HelloAction">
<result name="success">/success1.jsp</result>
<result name="input1">/input1.jsp</result>
<interceptor-ref name="defaultStack"></interceptor-ref>
<interceptor-ref name="helloInterceptor"></interceptor-ref>
</action>
</package>
<package name="check1interceptor" extends="struts-default">
<interceptors>
<interceptor name="logincheckinterceptor" class="com.test.action.CheckInterceptor">
</interceptor>
</interceptors>
<action name="login2action" class="com.test.action.UserAction">
<result name="success">/loginsuccess.jsp</result>
<result name="error">/loginerror.jsp</result>
<result name="login">/login2.jsp</result>
<interceptor-ref name="defaultStack"></interceptor-ref>
<interceptor-ref name="logincheckinterceptor"></interceptor-ref>
</action>
</package>
</struts>
3：Action（控制器，负责跳转到不同页面）
package com.test.action;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private String name;
private String pass;
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String execute()throws Exception
{
ActionContext actionContext=ActionContext.getContext();
if(getName().equals("admin")&&getPass().equals("123"))
{
Map sessionMap=actionContext.getSession();
sessionMap.put("name",getName());
return "success";
}
else
{
actionContext.put("tip", "用户名或密码错误");
return "error";
}
}
}
4：jsp(登陆成功后的页面）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>拦截器进行了权限控制</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">
</head>
<body>
您已经成功登陆了系统！
</body>
</html>
5；jsp(登录失败页面）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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 'loginerror.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">
</head>
<body>
<font color="red">${requestScope.tip}</font><br/>
<a href="login2.jsp">重新登录</a>
</body>
</html>