javax.servlet.ServletException: Neither Errors instance nor plain target ob

javax.servlet.ServletException: Neither Errors instance nor plain target object for bean name 'command' available as request attribute

此问题已经在网上找了很久,,确信 程序和配置 没有错误,,可就是报此类错误,,望高人相

没发现名为command的属性,在request的attribute中