spring--AOP--权限---demo1---bai

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AOP权限DEMO1:
 
实体类:
 
package com.etc.entity;
 
import org.aspectj.lang.annotation.Pointcut;
 
public class User implements IUser
{
    public static int NORMAL = 1;//普通用户角色
    public static int ADMIN = 2;    //管理员角色
    private int role;  //所属的角色
     
    public int getRole() {
        return role;
    }
 
    public void setRole(int role) {
        this.role = role;
    }
 
     
    public void login() {
        System.out.println("执行登录了!");
         
    }
 
     
    public void reg() {    
        System.out.println("执行注册了!");
    //throw new RuntimeException("注册过程发生异常!");
    }
 
}
================================================================
实体类需实现的接口:
 
package com.etc.entity;
 
//定义用户接口
public interface IUser
{
    void login(); //登录
    void reg(); //注册
     
}
=================================================================
通知类:
 
package com.etc.advice;
 
import java.util.Calendar;
 
import org.aspectj.lang.ProceedingJoinPoint;
 
import com.etc.entity.User;
 
//实现权限校验的通知.规定周三不能登录系统
public class PrivilegeAdvice
{
     
    public void  around(ProceedingJoinPoint point) throws Throwable
    {
        //获得该通知被织入的目标对象
        User u = (User) point.getTarget();
         
        //1 今天是星期几?
        Calendar c = Calendar.getInstance();
         
        int day = c.get(Calendar.DAY_OF_WEEK);
        if((day-1)==5&&u.getRole()==User.ADMIN)
        {
            System.out.println("周三普通用户不能登录本系统!");
            return;
        }
        point.proceed();//允许代码继续往前
         
    }
}
 
=================================================================
配置文件:
 
<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
  <!-- 定义1个业务类对象 -->
  <bean id="user" class="com.etc.entity.User">
    <property name="role" value="2"></property>
  </bean>
<!-- 定义1个通知类对象  -->
    <bean id="myadv2" class="com.etc.advice.PrivilegeAdvice">
    </bean>
  <aop:config>
   <!-- 配置切点的集合、即切线 -->
     <aop:pointcut expression="execution(* com.etc.entity.User.*(..))" id="mypc"/>
   <!-- 配置切入的方向 ,即切面-->
      <aop:aspect ref="myadv2">
         <!-- 前置通知 -->
        <aop:before method="around" pointcut-ref="mypc"/>
      </aop:aspect>
  </aop:config>
     
</beans>
===============================================
测试类:
 
package com.etc.test;
 
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
import com.etc.entity.IUser;
 
public class Test {
    public static void main(String[] args)
    {
        BeanFactory fac = new ClassPathXmlApplicationContext("applicationContext.xml");    
        IUser u = (IUser) fac.getBean("user");
         
        //执行业务方法
        u.login();
        System.out.println("=====");
         
        try
        {
            u.reg();
        } catch (Exception e)
        {
             
        }
    }
}
=====================================================================

  

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