JUnit与AOP实践-优快云博客

本文通过JUnit测试框架演示了面向切面编程(AOP)的应用，使用JDK动态代理实现对PersonService接口的方法拦截。测试中对PersonServiceBean进行了实例化，并调用了其save方法。

package net.itdos.junit;


import net.itdos.aop.JDKProxy;
import net.itdos.service.PersonService;
import net.itdos.service.impl.PersonServiceBean;

import org.junit.BeforeClass;
import org.junit.Test;

public class AOPJunit {

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
	}
	@Test
	public void AOP(){
		JDKProxy factory = new JDKProxy();
		PersonService personService = (PersonService)factory.CreateProxyIntance(new PersonServiceBean("fff"));
		personService.save();
	}
}

package net.itdos.service.impl;

import net.itdos.service.PersonService;

public class PersonServiceBean implements PersonService {
	
	public PersonServiceBean() {
		super();
	}

	public PersonServiceBean(String name) {
		super();
		this.name = name;
	}

	private String name;

	public String getName() {
		return name;
	}

	public void save(){
		System.out.println("这是个save方法");
	}
	public void update(){
		System.out.println("这是个update方法");
	}
}

package net.itdos.aop;

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

import net.itdos.service.impl.PersonServiceBean;

public class JDKProxy implements InvocationHandler {
	public Object targetObject;
	public Object CreateProxyIntance(Object targetObject){
		this.targetObject = targetObject;
		return Proxy.newProxyInstance(this.targetObject.getClass().getClassLoader(), 
				this.targetObject.getClass().getInterfaces(), this);
	}
	@Override
	public Object invoke(Object object, Method method, Object[] args)
			throws Throwable {
		Object  result = null;
		PersonServiceBean personServiceBean = (PersonServiceBean)this.targetObject;
		if(personServiceBean.getName() != null){
			result = method.invoke(targetObject, args);
		}
		
		return result;
	}
}

JDK代理