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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  "www.chenhaitao1981.com";  }}

使用:

public static void main(String[] args){  ChenhaitaoProxy proxy=new ChenhaitaoProxy(new Chanhaitao());  UserInterface userInterface =proxy.getUserInterface();  userInterface.getName();  // chenhaitao  userInterface.getAddress();  // www.chenhaitao1981.com}