aop spring

 

今天重新看了 动态代理模式，又看了一遍Spring  AOP，把我的项目慢慢的添加Spring，把我了解的AOP和大家分享一下。

下面的例子参考了别人的代码

添加Spring3.0  需要的包

 

定义一个接口 HelloInterface

package rw.hello;

public interface HelloInterface {
    void BeforeHello();
    void ExecuteHello();
    void AfterHello();
}

package rw.hello; public interface HelloInterface { void BeforeHello(); void ExecuteHello(); void AfterHello(); }
实现这个接口的类 Hello

package rw.hello;

public class Hello implements HelloInterface{

    public void BeforeHello() {
        // TODO Auto-generated method stub
        System.out.println("----------------Hello 方法执行之前");

    }

    public void ExecuteHello() {
        // TODO Auto-generated method stub
        System.out.println("----------------Hello 方法执行中......");
    }

    public void AfterHello() {
        // TODO Auto-generated method stub
        System.out.println("----------------Hello 方法执行之后");
    }

}

package rw.hello; public class Hello implements HelloInterface{ public void BeforeHello() { // TODO Auto-generated method stub System.out.println("----------------Hello 方法执行之前"); } public void ExecuteHello() { // TODO Auto-generated method stub System.out.println("----------------Hello 方法执行中......"); } public void AfterHello() { // TODO Auto-generated method stub System.out.println("----------------Hello 方法执行之后"); } }
现在想在 Hello 类的

BeforeHello()，ExecuteHello()，AfterHello()这三个方法执行之前做其它事情，比如权限问题，记录日志之类.....反正我今天是添加的用户权限问题

同样有3个类，风别是BeforeHello()，ExecuteHello()，AfterHello()这三个方法调用之前要调用的
下面只测试一下After.java 和 Before.java

After.java

package rw.method;

import org.aspectj.lang.JoinPoint;


public class After {
  public void invoke(JoinPoint joinpoint){
      System.out.println("After 类"+joinpoint.getSignature().getName());
  }
}

Before.java

package rw.method;

import org.aspectj.lang.JoinPoint;


public class Before {
  public void invoke(JoinPoint joinpoint){
      System.out.println("Before 类"+joinpoint.getSignature().getName());
  }
}

BeforeHello()，ExecuteHello()，AfterHello()这三个方法执行之前做其它事情，比如权限问题，记录日志之类.....反正我今天是添加的用户权限问题 同样有3个类，风别是BeforeHello()，ExecuteHello()，AfterHello()这三个方法调用之前要调用的 下面只测试一下After.java 和 Before.java After.java package rw.method; import org.aspectj.lang.JoinPoint; public class After {   public void invoke(JoinPoint joinpoint){       System.out.println("After 类"+joinpoint.getSignature().getName());   } } Before.java package rw.method; import org.aspectj.lang.JoinPoint; public class Before {   public void invoke(JoinPoint joinpoint){       System.out.println("Before 类"+joinpoint.getSignature().getName());   } } 最注意的还是 applicationContext.xml的配置

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:p="http://www.springframework.org/schema/p"
    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.springsource.org/schema/aop/spring-aop-3.0.xsd
                        http://www.springframework.org/schema/tx
                            http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

<bean id="hello" class="rw.hello.Hello"/>

<bean id="after" class="rw.method.After"/>
<bean id="before" class="rw.method.Before"/>
<bean id="execute" class="rw.method.Execute"/>

<aop:config>
<aop:pointcut expression="execution(* rw.hello.HelloInterface.BeforeHello(..))" id="beforepointcut"/>
<aop:aspect id="beforeaspect" ref="before">
  <aop:before method="invoke" pointcut-ref="beforepointcut"/>
</aop:aspect>
</aop:config>

<aop:config>
 <aop:pointcut expression="execution(* rw.hello.HelloInterface.AfterHello(..))" id="afterpointcut"/>
 <aop:aspect id="afteraspact" ref="after">
    <aop:after method="invoke" pointcut-ref="afterpointcut"/>
 </aop:aspect>
</aop:config>
</beans>

<?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:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" 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.springsource.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> <bean id="hello" class="rw.hello.Hello"/> <bean id="after" class="rw.method.After"/> <bean id="before" class="rw.method.Before"/> <bean id="execute" class="rw.method.Execute"/> <aop:config> <aop:pointcut expression="execution(* rw.hello.HelloInterface.BeforeHello(..))" id="beforepointcut"/> <aop:aspect id="beforeaspect" ref="before"> <aop:before method="invoke" pointcut-ref="beforepointcut"/> </aop:aspect> </aop:config> <aop:config> <aop:pointcut expression="execution(* rw.hello.HelloInterface.AfterHello(..))" id="afterpointcut"/> <aop:aspect id="afteraspact" ref="after"> <aop:after method="invoke" pointcut-ref="afterpointcut"/> </aop:aspect> </aop:config> </beans>排版不是很好

1，在Hello的BeforeHello()方法执行之前 会调用Before类中的invoke(JoinPoint joinpoint)方法

2，在Hello的AfterHello()方法执行之后 会调用After类中的invoke(JoinPoint joinpoint)方法

测试类

package rw.test;


import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import rw.hello.HelloInterface;


public class AllTest {
    private ApplicationContext context;
    @Before
    public void setUp() throws Exception {
        context=new ClassPathXmlApplicationContext("applicationContext.xml");
    }
     @Test
    public void TestHelloInterface(){
        HelloInterface hello=(HelloInterface) context.getBean("hello");
        hello.BeforeHello();
        hello.AfterHello();
    }
}

package rw.test; import org.junit.Before; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import rw.hello.HelloInterface; public class AllTest { private ApplicationContext context; @Before public void setUp() throws Exception { context=new ClassPathXmlApplicationContext("applicationContext.xml"); } @Test public void TestHelloInterface(){ HelloInterface hello=(HelloInterface) context.getBean("hello"); hello.BeforeHello(); hello.AfterHello(); } }
输出结果

Hello 类中的 void ExecuteHello()方法在applicationContext.xml中没有加以任何配置

正常输出