Spring 各种Advice示例

直接上代码

package com.dada.test.spring.aop.advisor;

import java.lang.reflect.Method;
import org.springframework.aop.AfterReturningAdvice;
 
public class MyAfterAdvice implements AfterReturningAdvice
{

	public void afterReturning(Object result, Method method,
			Object[] parameter, Object target) throws Throwable {
		System.out.println("==============after return==============");
		System.out.println("result:" + result + ";method:" + method
				+ ";parameter:" + parameter + ";target:" + target);
	}

}

 

package com.dada.test.spring.aop.advisor;

import java.util.HashSet;
import java.util.Set;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
 
public class MyAroundAdvice implements MethodInterceptor
{
    private Set set=new HashSet();
    public Object invoke(MethodInvocation method) throws Throwable
    {
        set.add(method);
        System.out.println("============around before==========");
        Object result=method.proceed();
        System.out.println("============around after==========");
        return result;
    }
}

 

package com.dada.test.spring.aop.advisor;

import java.lang.reflect.Method;
import org.springframework.aop.MethodBeforeAdvice;
 
public class MyBeforeAdvice implements MethodBeforeAdvice
{
   
    public void before(Method method, Object[] parameters, Object target) throws Throwable
    {
        System.err.println("==========before===========");
        System.out.println(method.getName());
        System.out.println(parameters.length);
        System.out.println(target);
    }
}

 

package com.dada.test.spring.aop.advisor;

import org.springframework.aop.ThrowsAdvice;
import com.dada.test.spring.aop.MyException;

public class MyThrowsAdvice implements ThrowsAdvice
{
    public void afterThrowing(MyException e)
    { // 可以定义多个方法，只要传入的参数是不同异常
        System.err.println("MyThrowsAdvice:"+e.toString());
    }
 
    public void afterThrowing(RuntimeException e)
    {
        // 可以定义多个方法，只要传入的参数是不同异常
        System.err.print("RuntimeException!");
    }
}

 

package com.dada.test.spring.aop.service;

public interface IService {

	String doSth();
	  void doA();
}

 

package com.dada.test.spring.aop.service;

import com.dada.test.spring.aop.MyException;

public class MyServiceImpl implements IService{

	 public String doSth()
	  {
	    System.out.println(this);
	    System.out.println("MyServiceImpl doSth");
	    return "cindy";
	  }

	 public void doA()
	  {
		System.out.println("MyServiceImpl doA");
	    throw new MyException("111111111");
	  }

}

 

    
    
    
    
    
    
        
        
        
        
          
            beforeAdvice
            aroundAdvice
            afterAdvice
            afterAdvice
            throwsAdvice
        
        
    

 

package com.dada.test.spring.aop;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.dada.test.spring.aop.service.IService;

public class TestSpringAop {

public static void main(String[] args) throws Exception
{
    ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(new String[]
    {
        "com/dada/test/spring/aop/aop-context.xml"
    });
    IService ser = (IService) ctx.getBean("invoker");
    String rs = ser.doSth();
    System.out.println("rs="+rs.toString());
   
    try
    {
        ser.doA();
    }
    catch (Throwable t)
    {
        t.printStackTrace();
    }
    
}

}

运行结果如下：

2013-7-18 23:21:06 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@14ed9ff: display name [org.springframework.context.support.ClassPathXmlApplicationContext@14ed9ff]; startup date [Thu Jul 18 23:21:06 CST 2013]; root of context hierarchy
2013-7-18 23:21:06 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [com/dada/test/spring/aop/aop-context.xml]
2013-7-18 23:21:07 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@14ed9ff]: org.springframework.beans.factory.support.DefaultListableBeanFactory@12152e6
2013-7-18 23:21:07 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@12152e6: defining beans [beforeAdvice,aroundAdvice,afterAdvice,throwsAdvice,servTarget,invoker]; root of factory hierarchy
2013-7-18 23:21:07 org.springframework.aop.framework.ProxyFactoryBean getObject
警告: Using non-singleton proxies with singleton targets is often undesirable.Enable prototype proxies by setting the 'targetName' property.
==========before===========
doSth
0
com.dada.test.spring.aop.service.MyServiceImpl@6f7ce9
============around before==========
com.dada.test.spring.aop.service.MyServiceImpl@6f7ce9
MyServiceImpl doSth
==============after return==============
result:cindy;method:public abstract java.lang.String com.dada.test.spring.aop.service.IService.doSth();parameter:[Ljava.lang.Object;@1dfafd1;target:com.dada.test.spring.aop.service.MyServiceImpl@6f7ce9
==============after return==============
result:cindy;method:public abstract java.lang.String com.dada.test.spring.aop.service.IService.doSth();parameter:[Ljava.lang.Object;@8fce95;target:com.dada.test.spring.aop.service.MyServiceImpl@6f7ce9
============around after==========
rs=cindy
==========before===========
doA
0
com.dada.test.spring.aop.service.MyServiceImpl@6f7ce9
============around before==========
MyServiceImpl doA
MyThrowsAdvice:com.dada.test.spring.aop.MyException: 111111111
com.dada.test.spring.aop.MyException: 111111111
 at com.dada.test.spring.aop.service.MyServiceImpl.doA(MyServiceImpl.java:17)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
 at org.springframework.aop.framework.adapter.ThrowsAdviceInterceptor.invoke(ThrowsAdviceInterceptor.java:126)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
 at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:50)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
 at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:50)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
 at com.dada.test.spring.aop.advisor.MyAroundAdvice.invoke(MyAroundAdvice.java:15)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
 at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:50)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
 at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
 at $Proxy0.doA(Unknown Source)
 at com.dada.test.spring.aop.TestSpringAop.main(TestSpringAop.java:21)

after return出现了2次请注意，思考下是什么原因