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   JavaÔÚJDK1.3Ö®ºó¼ÓÈëÁË¿ÉЭÖú¿ª·¢¶¯Ì¬´úÀí¹¦ÄܵÄAPI.ʹÓö¯Ì¬´úÀí£¬¿ÉÒÔʹһ¸ö´¦ÀíÕߣ¨´úÀí£©·þÎñÓÚ¸÷¸ö¶ÔÏó¡£´´½¨Ò»¸ö¶¯Ì¬´úÀíÀàÖ»ÐèʵÏÖjava.lang.reflect.InvocationHandler½Ó¿Ú¡£
  ÏÂÃæ´´½¨Ò»¸ö´¦ÀíÈÕÖ¾µÄ¶¯Ì¬´úÀíÀàLogHandlerÈ¥´úÀíHelloSpeakerÀà
   Ê×ÏÈ´´½¨HelloSpeakerµÄ½Ó¿Ú
package com.test;
public interface IHello {
    public void sayHello(String name);
}
   È»ºó´´½¨HelloSeaker
package com.test;
public class HelloSpeaker implements IHello {
 public void sayHello(String name) {
  System.out.println("hello:"+name);
 }
}
  ×îºó´´½¨LogHandlerÀà
package com.test;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.logging.Logger;
public class LogHandler implements InvocationHandler {
 private Logger logger = Logger.getLogger(this.getClass().getName());
 private Object delegate;
 public Object bind(Object delegate) {
  this.delegate = delegate;
  return Proxy.newProxyInstance(delegate.getClass().getClassLoader(),
    delegate.getClass().getInterfaces(), this);
 }
 public Object invoke(Object proxy, Method method, Object[] args)
   throws Throwable {
  Object result = null;
  try {
   logger.info("method start..." + method);
   result = method.invoke(delegate, args);
   logger.info("method end..." + method);
  } catch (Exception e) {
   logger.info(e.getMessage());
  }
  return result;
 }
}
 ºÃÁË£¬ÏÖÔÚÎÒÃDZàдһ¸ö²âÊÔÀàDemo
package com.test;
public class Demo {
 public Demo() {
  // TODO Auto-generated constructor stub
 }
 /**
  * @param args
  */
 public static void main(String[] args) {
  LogHandler logHandler = new LogHandler();
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