code: public static <T extends Annotation> MethodInvokeProxy proxyByAnnotationTag(Object target,String tag,Object ...args)
  	{
  		Method m=findMethodByAnnotationTag(target,tag);
  		if(m!=null)
  		{
  			return new MethodInvokeProxy(target, m, args);
  		}
  		return null;
  	}
docs: 根据指定注解获取
  @param target
  @param tag
  @param args
  @return