code: private boolean validate(String className,String ...depends)
  	{
  		ClassFile cf = getClassFile(className);
  		if(cf==null)
  		{
  			_log.error("can't find classFile:"+className);
  			return false;
  		}
  		boolean result=true;
  		for(int i=0;i<depends.length;i++)
  		{
  			String parentClassName=depends[i];
  			ClassFile parentCf=getClassFile(parentClassName);
  			if(parentCf==null)
  			{//如果依赖的类不能能拿到
  				_log.error("can't find dependClassFile:"+parentClassName);
  				result= false;
  				break;
  			}
  		}
  		return result;
  	}
docs: 验证注册类是否符合要求
  @param className
  @param depends