6、Struts2拦截器实现权限控制

1、创建如下项目结果

2、在com.entity包下创建

 package com.entity;

 public class User {

     private String name;

     private String pwd;

     public User() {

     }

     public User(String name, String pwd) {

         this.name = name;

         this.pwd = pwd;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public String getPwd() {

         return pwd;

     }

     public void setPwd(String pwd) {

         this.pwd = pwd;

     }

     @Override

     public String toString() {

         return "User [name=" + name + ", pwd=" + pwd + "]";

     }

 }

User.java

3、在com.action包下创建LoginAction.java

 package com.action;

 import javax.servlet.http.HttpSession;

 import org.apache.struts2.ServletActionContext;

 import com.entity.User;

 import com.opensymphony.xwork2.ActionContext;

 import com.opensymphony.xwork2.ActionSupport;

 /**

  * 登录的Action

  * @author pc

  *

  */

 public class LoginAction extends ActionSupport {

     private User user;

     public String login(){

         HttpSession session=ServletActionContext.getRequest().getSession();

         //登录成功,将用户放入session作用域中

         if(user!=null){

             System.out.println("user:"+user);

             //保存用户信息到Session中

             session.setAttribute("user", user);

             return SUCCESS;

         }else{

             return ERROR;

         }     

     }

     public User getUser() {

         return user;

     }

     public void setUser(User user) {

         this.user = user;

     }

 }

LoginAction.java

4、在com.interceptor包下创建LoginInteceptor.java

 package com.interceptor;

 import java.util.Map;

 import javax.servlet.http.HttpSession;

 import org.apache.struts2.ServletActionContext;

 import com.entity.User;

 import com.opensymphony.xwork2.Action;

 import com.opensymphony.xwork2.ActionInvocation;

 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

 /**

  * 权限验证检查拦截器

  * @author pc

  *

  */

 public class LoginInteceptor extends AbstractInterceptor {

      @Override

         public String intercept(ActionInvocation invocation) throws Exception {

             //Map<String, Object> session=invocation.getInvocationContext().getSession();

           HttpSession session=ServletActionContext.getRequest().getSession();

            User user=(User)session.getAttribute("user");

             System.out.println("loginInte:"+user);

             if(user==null){

                 //请求的Action

                 return invocation.invoke();

             }else{

                 return Action.LOGIN;

             }

         }

 }

LoginInteceptor.java

5、在src下创建struts.xml文件

 <?xml version="1.0" encoding="UTF-8"?>

 <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "struts-2.1.dtd" >

 <struts>

      <!--1. 中文乱码处理 -->

      <constant name="struts.i18n.encoding" value="UTF-8"/>

     <package name="default" namespace="/" extends="struts-default">

     <!--2. 配置所有拦截器的节点 -->

      <interceptors>

        <!-- 定义权限验证拦截器 -->

        <interceptor name="myLogin" class="com.interceptor.LoginInteceptor"></interceptor>

        <!-- 定义拦截器栈 -->

        <interceptor-stack name="myStack">

          <!-- 引用自定义拦截器 -->

          <interceptor-ref name="myLogin"/>

          <!-- 引用系统默认拦截器 -->

          <interceptor-ref name="defaultStack"/>

        </interceptor-stack>

      </interceptors> 

      <!-- 3.定义默认拦截器 -->

      <default-interceptor-ref name="myStack"/>

      <!-- 4.定义全局结果 -->

      <global-results>

             <result name="login" type="redirect">/login.jsp</result>

         </global-results>

      <!-- 5.配置Action=明星 -->

       <action name="login" class="com.action.LoginAction" method="login">

         <result name="success">/index.jsp</result>

         <result name="error">/error.jsp</result>

         <!-- 引用拦截器==小工 -->

         <interceptor-ref name="myStack"/>

       </action>

     </package>

 </struts>

struts.xml

6、在WebRoot下创建login.jsp文件

 <%@ 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 '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>

      <center>

        <fieldset style="width:300px;">

          <legend>登录</legend>

         <!-- 在浏览器直接请求页面，拦截器不会发生任何作用，

                    拦截器只针对于Action的请求发生作用

    也就是login.action走拦截器，直接请求index.jsp不会走拦截器-->

          <form action="login.action" method="post">

             <table>

               <tr>

                 <td>用户名：</td>

                 <td><input type="text" name="user.name"/></td>

               </tr>

               <tr>

                 <td>密码：</td>

                 <td><input type="password" name="user.pwd"/></td>

               </tr>

               <tr>

                 <td><input type="submit" value="提交"/></td>

                 <td><input type="reset" value="重置"/></td>

               </tr>

             </table>

          </form>

        </fieldset>

      </center>

   </body>

 </html>

7、在WebRoot下创建index.jsp文件

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

 <%@taglib uri="/struts-tags" prefix="s"%>

 <%

 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>

    <h1>操作成功</h1>

    <s:if test="user.name eq 'holly'">

       holly你来啦?

    </s:if>

    <s:else>

       我不认识你?你是谁?

    </s:else>

   </body>

 </html>

index.jsp

8、在WebRoot下创建error.jsp文件

 <%@ 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 '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>

       操作失败!

   </body>

 </html>

error.jsp

9、编辑WebRoot下WEB-INF下web.xml文件

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app id="WebApp_9" version="2.4" 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">

     <filter>

         <filter-name>struts2</filter-name>

         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

     </filter>

     <filter-mapping>

         <filter-name>struts2</filter-name>

         <url-pattern>/*</url-pattern>

     </filter-mapping>

     <welcome-file-list>

         <welcome-file>login.jsp</welcome-file>

     </welcome-file-list>

 </web-app>

web.xml

10、运行

当把login.jsp页面的form表单的action值改为index.jsp后，再看登录后的效果

巴特西

6、Struts2拦截器实现权限控制

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