Struts2拦截器权限验证（源码）！

          长话短说，抛砖引玉，举个很简单的例子，通过Session，验证用户是否已登陆。

环境：MyEclipse6.5+Mysql5+struts2.0.11.2

源码：拦截器类：

AuthInterceptor.java

 

<!----> package  com.sy.interceptor;

import  java.util.Map;

import  com.opensymphony.xwork2.Action;
import  com.opensymphony.xwork2.ActionInvocation;
import  com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public   class  AuthInterceptor  extends  AbstractInterceptor {

     private   static   final   long  serialVersionUID  =   - 3363926000416510686L ;

    @SuppressWarnings( " unchecked " )
    @Override
     public  String intercept(ActionInvocation invocation)  throws  Exception {

        @SuppressWarnings( " unused " )
        Map map = invocation.getInvocationContext().getSession(); // 获取session映射
        
         if (map.get( " user " ) == null ){ // 如果未登陆转到登陆页面
             return  Action.LOGIN;
        }
         else {
             return  invocation.invoke(); // 如果登陆继续执行
        }
    }

}

 

验证用户登陆后的Action类，负责向Session中插入值。

AdminAction.java

 

<!----> package  com.sy.action;

import  java.util.List;
import  java.util.Map;

import  com.opensymphony.xwork2.ActionContext;
import  com.opensymphony.xwork2.ActionSupport;
import  com.sy.dao.AdminDao;
import  com.sy.dao.NewsDao;
import  com.sy.dao.impl.AdminDaoImpl;
import  com.sy.dao.impl.NewsDaoImpl;
import  com.sy.vo.Admin;
import  com.sy.vo.News;

public   class  AdminAction  extends  ActionSupport {

     private   static   final   long  serialVersionUID  =   - 3699334709726488611L ;
     int  i = 1 ; // 中间变量
     private   int  k; // 储存最大页面数
     private   int  pageNow = 1 ;  // 页码数,初始为1
     private   int  pageSize  =   8  ;  // 页面行数 
     private   int  intRowCount; // 总行数
     private   int  intPageCount; // 总页数
     private  List < News >  Newss;
     private  Admin admin;
     public  List < News >  getNewss() {
         return  Newss;
    }
     public   void  setNewss(List < News >  newss) {
        Newss  =  newss;
    }
     public  Admin getAdmin() {
         return  admin;
    }
     public   void  setAdmin(Admin admin) {
         this .admin  =  admin;
    }
     public   int  getPageNow() {
         return  pageNow;
    }
     public   void  setPageNow( int  pageNow) {
         this .pageNow  =  pageNow;
    }
     public   int  getPageSize() {
         return  pageSize;
    }
     public   void  setPageSize( int  pageSize) {
         this .pageSize  =  pageSize;
    }
     public   int  getK() {
         return  k;
    }
     public   void  setK( int  k) {
         this .k  =  k;
    }
     public   int  getIntRowCount() {
         return  intRowCount;
    }
     public   void  setIntRowCount( int  intRowCount) {
         this .intRowCount  =  intRowCount;
    }
     public   int  getIntPageCount() {
         return  intPageCount;
    }
     public   void  setIntPageCount( int  intPageCount) {
         this .intPageCount  =  intPageCount;
    }
    @SuppressWarnings( " unchecked " )
     public  String execute()  throws  Exception {
        
        AdminDao adi = new  AdminDaoImpl();
        admin.getAname();
        admin.getApassword();
         if (adi.isLogin(admin)){
            
            Map map = ActionContext.getContext().getSession(); // 插入Session的值
            map.put( " user " , admin.getAname());
            
            NewsDao npage = new  NewsDaoImpl();
            intRowCount = npage.count();
            k = (intRowCount  +  pageSize  -   1 )  /  pageSize;
            intPageCount  =  (intRowCount  +  pageSize  -   1 )  /  pageSize; // 计算出总页数
             if (pageNow < 1 ){
                pageNow = 1 ;
            }
            
             if (pageNow  >  intPageCount)
                 pageNow = intPageCount;
                 i  =  (pageNow  - 1 ) * pageSize;
            NewsDao nlist = new  NewsDaoImpl();
             if ( null != nlist.queryByPage(i,pageSize)){
            Newss  =  nlist.queryByPage(i,pageSize);
            
             return  SUCCESS;
            } else {
                 return   " failure " ;
            }
                } else
                     return   " failure " ;
        }
    }

 

 struts.xml

 

<!----> <? 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 >
     < package  name = " News "   extends = " struts-default " >

     < interceptors >

     < interceptor - stack name = " myStack " >
                 < interceptor - ref name = " defaultStack " ></ interceptor - ref >
                 < interceptor - ref name = " auth " ></ interceptor - ref >
     </ interceptor - stack >
    
     < interceptor name = " auth "   class = " com.sy.interceptor.AuthInterceptor " />
     </ interceptors >

     < global - results >
         < result name = " login "  type = " redirect " >/ admin / login.jsp </ result >
     </ global - results >
<!--  验证管理员登陆  -->
         < action name = " login "   class = " com.sy.action.AdminAction " >
             < result name = " failure " >/ admin / failure.jsp </ result >
             < result >/ admin / ManageNews.jsp </ result >
             < result name = " input " >/ admin / login.jsp </ result >
         </ action >
<!--  管理员列表  -->         
         < action name = " alist "   class = " com.sy.action.ListAction "  method = " adminList " >
             < result >/ admin / deleteManager.jsp </ result >
             < result name = " failure " >/ admin / Showfailure.jsp </ result >
             < interceptor - ref name = " myStack " ></ interceptor - ref >
         </ action >
     </ package >
</ struts >

 

 配置完成！！！

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