使用JDK中的Proxy技术实现AOP功能

@Test
public void proxyTest()
{
JDKProxyFactory factory = new JDKProxyFactory();
PeopleService peopleService = (PeopleService) factory.createProxyInstance(new PeopleServiceBean("张三"));
peopleService.save("hello");
}

package com.tiger.aop;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

import com.tiger.service.impl.PeopleServiceBean;

public class JDKProxyFactory implements InvocationHandler
{
private Object targetObject;

public Object createProxyInstance(Object targetObject)
{
this.targetObject = targetObject;
return Proxy.newProxyInstance(this.targetObject.getClass().getClassLoader(),
this.targetObject.getClass().getInterfaces(), this);
}

public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable
{
PeopleServiceBean bean = (PeopleServiceBean) this.targetObject;
Object result = null;

if(bean.getUser() != null)
{
result = method.invoke(targetObject, args);
}

return result;
}
}

package com.tiger.service;

public interface PeopleService
{
public void save(String name);

public void update(String name,Integer peopleid);

public String getPeopleName(Integer peopleid);
}

package com.tiger.service.impl;

import com.tiger.service.PeopleService;

public class PeopleServiceBean implements PeopleService
{
private String user = null;

public PeopleServiceBean(){}

public PeopleServiceBean(String user)
{
this.user = user;
}

public void save(String name)
{
System.out.println("我是save()方法");
}

public void update(String name, Integer peopleid)
{
System.out.println("我是update()方法");
}

public String getPeopleName(Integer peopleid)
{
System.out.println("我是getPeopleName()方法");
return "xxx";
}

public String getUser()
{
return user;
}
}

我是save()方法