java的动态代理

动态代理类

package itbuluoge.proxy;

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

public class DynamicProxy implements InvocationHandler{

  private Object obj;
  public Object bind(Object obj)
  {
    this.obj=obj;
    return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces(), this);
  }
  public Object invoke(Object arg0, Method method, Object[] args)
      throws Throwable {
    Object result=null;
    try
    {
      validateUser();
      result=method.invoke(obj,args);
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
    return result;
  }
  
  public void validateUser()
  {
    System.out.println("验证用户...");
  }

}

测试类

package itbuluoge.proxy;

public class TestDynamic {

  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    DynamicProxy dp=new DynamicProxy();
    ICompent com=(ICompent)dp.bind(new Compent());
    com.bussiness1();
    com.bussiness2();
    com.bussiness3();
  }

}

输出结果