Proxy实例使用

1.总共有4个类,1个接口类,1个实现接口的类,1个实现invocationHandler接口的类,1个测试类.

package com.meiyoudao.invocationhandle;

public interface SayClass {
	void say();
}

package com.meiyoudao.invocationhandle;

public class SayClassImpl implements SayClass {

	public void say() {
		System.out.println("**************hello***************");

	}

}

package com.meiyoudao.invocationhandle;

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

public class LogHandle implements InvocationHandler {
	private Object target = null;

	public LogHandle(Object obj) {
		this.target = obj;
	}

	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		System.out.println("Log**************");
		Object o = method.invoke(target, args);
		System.out.println("****************Log");
		return o;
	}

}

package com.meiyoudao.invocationhandle;

import java.lang.reflect.Proxy;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		SayClass say = new SayClassImpl();
		LogHandle log = new LogHandle(say);
		SayClass clz = (SayClass) Proxy.newProxyInstance(say.getClass()
				.getClassLoader(), new Class[]{SayClass.class}, log);
		clz.say();

	}

}