一文读懂Java中动态代理的原理

public interface Subject  {   public void doSomething();  }  public class RealSubject implements Subject  {   public void doSomething()   {    System.out.println( "call doSomething()" );   }  }  public class ProxyHandler implements InvocationHandler  {   private Object proxied;      public ProxyHandler( Object proxied )   {    this.proxied = proxied;   }      public Object invoke( Object proxy, Method method, Object[] args ) throws Throwable   {    //在转调具体目标对象之前，可以执行一些功能处理  //转调具体目标对象的方法  return method.invoke( proxied, args);     //在转调具体目标对象之后，可以执行一些功能处理 }  }