Spring学习十三：使用JDK中的Proxy技术实现AOP功能

package learn.aop.service;

public interface PersonService {

	public void save(String personname);
	public void update(String personname, Integer personid);
	public String getPersonName(Integer personId);
}

package learn.aop.service.impl;

import learn.aop.service.PersonService;
/**
 * 业务需求：对service中的所有方法进行拦截，拦截到方法之后，
 * 判读 user 是否为 null；
 * 如果为 null 则没有权限去调用service 里面的方法；否则，反之。
 *
 */
public class PersonServiceImpl implements PersonService {

	private String user;
	
	
	public String getUser() {
		return user;
	}

	public PersonServiceImpl(){
		
	}
	
	public PersonServiceImpl(String user){
		this.user = user;
	}
	@Override
	public void save(String personname) {
		System.out.println("save()方法");
	}

	@Override
	public void update(String personname, Integer personid) {
		System.out.println("update()方法");
	}

	@Override
	public String getPersonName(Integer personId) {
		System.out.println("getPersonName()方法");
		return "xuexi";
	}

}

package junit.test;

import static org.junit.Assert.*;
import learn.aop.service.PersonService;
import learn.aop.service.impl.PersonServiceImpl;

import org.junit.Test;

import com.learn.aop.JDKProxyFactory;

public class ProxyTest {

	@Test
	public void test() {
		// 业务代理类
		JDKProxyFactory factory = new JDKProxyFactory();
		// 元对象(被代理对象)
		PersonService service = (PersonService)factory.createProxyIntance(new PersonServiceImpl("hwl"));
		service.save("hwl");
	}

}