把webwork-2.2.2.jar升級到webwork-2.2.4.jar和xwork-1.1.3.jar升級到xwork-1.2.1.jar為什么會出現(xiàn)404的錯誤，而且控制臺拋出 WARN [http-8080-Processor25] VisitorFieldValidator.warn(104) | The visited object is null, VisitorValidator will not be able to handle validation properly. Please make sure the visited object is not null for VisitorValidator to function properly
請指教，謝謝！