代理模式学习笔记

来源：互联网发布：原油价格数据在哪里查编辑：程序博客网时间：2024/06/13 01:29

系统默认代理模式是使用

/** * Created by nanji on 2017/1/19. */public interface PersonService {    public void save(String name);    public void update(String name,Integer personid);    public String getPersonName(Integer personid);

/** * Created by nanji on 2017/1/19. */public class PersonServiceBean implements PersonService {    private String user=null;    public PersonServiceBean() {    }    public PersonServiceBean(String user) {        this.user = user;    }    @Override    public void save(String name) {        System.out.println("xxxx"+name);    }    @Override    public void update(String name, Integer personid) {        System.out.println("我是 update method ");    }    @Override    public String getPersonName(Integer personid) {        System.out.println("我是getPersonname 方法");        return "xxx"+personid;    }    public String getUser() {        return user;    }    public void setUser(String user) {        this.user = user;    }}

/** * Created by nanji on 2017/1/19. */public class JDKProxyFactory implements InvocationHandler{    private 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 proxy, Method method, Object[] args) throws Throwable {        Object result=null;        PersonServiceBean bean=(PersonServiceBean)this.targetObject;        if(bean.getUser()!=null){            method.invoke(targetObject,args);        }        return result;    }}

    @Test    public void ProxyTest(){        JDKProxyFactory factory=new JDKProxyFactory();        PersonService personService= (PersonService) factory.createProxyIntance(new PersonServiceBean("kong"));        personService.save("tian");    }

这里写图片描述

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