class proxy

1.Proxy.newProxyInstance(source.getClass().getClassLoader(), source.getClass().getInterfaces(), myInvoHandler)

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;

class MyInvocationHandler implements InvocationHandler{
	
	private Object source ;
	
	public MyInvocationHandler(Object source){
		this.source = source ;
	}
	
	@Override
	public  Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
//		System.out.println(proxy);// StackOverflowError course by recurse
		System.out.println(proxy.getClass());//proxy-class,not source-class
		if(null!=args){
			for(Object param : args){
				System.out.println(param);//method-input-param
			}
		}
		System.out.println("u can do special things before method-execute");
		Object obj =  method.invoke(source, args);//Point:source,not proxy. proxy's meaning?
		System.out.println("u can do special things after method-execute");
		return obj ;
	}
	
}

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class ClassProxyTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		PojoWithoutInterface pojo = new PojoWithoutInterface();
		pojo.setName(1111);
		Object pojoProxy = ClassProxyTest.getProxyInstance(pojo);
//		pojo = (PojoWithoutInterface) pojoProxy ;// class cast exception
		System.out.println(pojoProxy);
		Object pojoProxy1 = ClassProxyTest.getProxyInstance(pojo);// not equals,new instance
		System.out.println(pojoProxy.equals(pojoProxy1));//object 's method should be proxy
		
		ClassImplInterface impl = new ClassImplInterface() ;
		Object implProxy = ClassProxyTest.getProxyInstance(impl) ;
		InterfaceA interA = (InterfaceA) implProxy ;
		interA.methodA() ;
	}

	public static Object getProxyInstance(Object source){
		InvocationHandler myInvoHandler = new MyInvocationHandler(source) ;
		Object proxy = Proxy.newProxyInstance(source.getClass().getClassLoader(), source.getClass().getInterfaces(), myInvoHandler) ;
		Method[] publicMethods = proxy.getClass().getMethods() ;// proxy only have source's interface-method,not all-method
		if(null!=publicMethods){
			for(Method mthd : publicMethods){
				System.out.println(mthd.getName());
			}
		}
		return proxy ;
	}
	
}

class ClassImplInterface implements InterfaceA,InterfaceB{
		@Override
		public void methodA() {
			System.out.println("methodA execute");
		}
		@Override
		public void methodB() {
			System.out.println("methodB execute");
		}
		
		public void methodC(){//proxy can not execute
			System.out.println("self-method execute");
		}
	}

public class PojoWithoutInterface {
	private int name ;
	public int getName() {
		return name;
	}
	public void setName(int name) {
		this.name = name;
	}
}

public interface InterfaceA {
void methodA() ;
}
public interface InterfaceB {
void methodB() ;
}