一、java远程代理

1、NonOwnerInvocationHandler

public class NonOwnerInvocationHandler implements InvocationHandler{	PersonBean person;	public NonOwnerInvocationHandler(PersonBean person){		this.person=person;	}		@Override	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {		if(method.getName().startsWith("get")){			return method.invoke(person,args);		}else if(method.getName().equals("setHotOrNotRating")){			return method.invoke(person,args);		}else if(method.getName().startsWith("set")){			return new IllegalAccessException();		}		return null;	}}

2、OwnerInvocationHandler

public class OwnerInvocationHandler implements InvocationHandler{	PersonBean person;	public OwnerInvocationHandler(PersonBean person)	{		this.person=person;	}	@Override	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {					if(method.getName().startsWith("get")){			return method.invoke(person,args);		}else if(method.getName().equals("setHotOrNotRating")){			return new IllegalAccessException();		}else if(method.getName().startsWith("set")){			return method.invoke(person,args);		}		return null;	}}

3、代理的使用

public class MatchService {	public MatchService() {		PersonBean joe = getPersonInfo("joe", "male", "running");		PersonBean OwnerProxy = getOwnerProxy(joe);		System.out.println("Name is " + OwnerProxy.getName());		System.out.println("Interests is " + OwnerProxy.getInterests());		OwnerProxy.setInterests("Bowling");		System.out.println("Interests are " + OwnerProxy.getInterests());		OwnerProxy.setHotOrNotRating(50);		System.out.println("Rating is " + OwnerProxy.getHotOrNotRating());		OwnerProxy.setHotOrNotRating(40);		System.out.println("Rating is " + OwnerProxy.getHotOrNotRating());		System.out.println("**************");		PersonBean nonOwnerProxy = getNonOwnerProxy(joe);		System.out.println("Name is " + nonOwnerProxy.getName());		System.out.println("Interests are " + nonOwnerProxy.getInterests());		nonOwnerProxy.setInterests("haha");		System.out.println("Interests are " + nonOwnerProxy.getInterests());		nonOwnerProxy.setHotOrNotRating(60);		System.out.println("Rating is " + nonOwnerProxy.getHotOrNotRating());	}	PersonBean getPersonInfo(String name, String gender, String interests) {		PersonBean person = new PersonBeanImpl();		person.setName(name);		person.setGender(gender);		person.setInterests(interests);		return person;	}	PersonBean getOwnerProxy(PersonBean person) {		return (PersonBean) Proxy.newProxyInstance(person.getClass().getClassLoader(), person.getClass().getInterfaces(),new OwnerInvocationHandler(person));	}	PersonBean getNonOwnerProxy(PersonBean person) {		return (PersonBean) Proxy.newProxyInstance(person.getClass().getClassLoader(),person.getClass().getInterfaces(),new NonOwnerInvocationHandler(person));	}}

4、PersonBean接口

public interface PersonBean {	String getName();	String getGender();	String getInterests();	int getHotOrNotRating();		void setName(String name);	void setGender(String gender);	void setInterests(String interests);	void setHotOrNotRating(int rating);}

5、PersonBeanImpl实现类

public class PersonBeanImpl implements PersonBean{	String name;	String gender;	String interests;	int rating;	int ratingcount=0;	@Override	public String getName() {		return name;	}	@Override	public String getGender() {		return gender;	}	@Override	public String getInterests() {		return interests;	}	@Override	public int getHotOrNotRating() {		if(ratingcount==0) 		return 0;		return (rating/ratingcount);	}	@Override	public void setName(String name) {		this.name=name;	}	@Override	public void setGender(String gender) {		this.gender=gender;	}	@Override	public void setInterests(String interests) {		this.interests=interests;	}	@Override	public void setHotOrNotRating(int rating) {		this.rating=rating;		ratingcount++;	}}

远程代理：远程对象的本地代表，通过它可以让远程对象当本地对象来调用。

远程代理通过网络和真正的远程对象沟通信息。