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代理: 对某一对象提供代理对象,由代理对象控制该对象的引用.

静态代理: 对象和代理对象都应实现统一接口

动态代理: 代理对象实现InvocationHandler接口

动态代理相关类:

java.lang.reflect.Proxy

java.lang.reflect.InvocationHandler

java.lang.reflect.Method

 

定义一个统一接口

public interface UserInterface { public String getName(); public String getAddress(); }

实现类:

public class Chenhaitao implements UserInterface { public String getName(){ return "chenhaitao"; } public String getAddress(){ return  "beijing"; } }

代理类:

public ChenhaitaoProxy implements InvocationHandler { private UserInterface userInterface; public void ChenhaitaoProxy (UserInterface userInterface){ this.userInterface=userInterface; } public UserInterface getUserInterface (){ return (UserInterface) Proxy.newProxyInstance(UserInterface.class.getClassLoader, new Class[]{ UserInterface.class }, this ); } @Override public Object invoke(Object proxy,Method method,Object[] args) throws Throwable{ if(method.getName().equals("getAddress")){ return this.getAddress(); }else{ return method.invoke(myinterface, args); } } public String getAddress(){ return  ""; } }

使用:

public static void main(String[] args){ ChenhaitaoProxy proxy=new ChenhaitaoProxy(new Chanhaitao()); UserInterface userInterface =proxy.getUserInterface(); userInterface.getName();  // chenhaitao userInterface.getAddress();  // }