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(null==map.get("user") && map.get("user").equals("")){//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！！！