最近在周围的有个朋友在项目开发中遇到了一个问题，启动项目时tomcat8中总是抛出如下异常：
Shell 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 警告 : couldn' t clear tomcat cache java .lang .NoSuchFieldException : resourceEntries at java .lang .Class .getDeclaredField ( Unknown Source ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .clearMap ( LocalizedTextUtil .java : 735 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .clearTomcatCache ( LocalizedTextUtil .java : 719 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .reloadBundles ( LocalizedTextUtil .java : 703 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .findDefaultText ( LocalizedTextUtil .java : 178 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .getDefaultMessage ( LocalizedTextUtil .java : 579 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .findText ( LocalizedTextUtil .java : 461 ) at com .opensymphony .xwork2 .util .LocalizedTextUtil .findText ( LocalizedTextUtil .java : 293 ) at org .apache .struts2 .interceptor .FileUploadInterceptor .getTextMessage ( FileUploadInterceptor .java : 368 ) at org .apache .struts2 .interceptor .FileUploadInterceptor .intercept ( FileUploadInterceptor .java : 277 ) at com .opensymphony .xwork2 .DefaultActionInvocation $ 2.doProfiling ( DefaultActionInvocation .java : 224 ) at com .opensymphony .xwork2 .DefaultActionInvocation $ 2.doProfiling ( DefaultActionInvocation .java : 223 ) at com .opensymphony .xwork2 .util .profiling .UtilTimerStack .profile ( UtilTimerStack .java : 455 ) at com .opensymphony .xwork2 .DefaultActionInvocation .invoke ( DefaultActionInvocation .java : 221 ) at com .opensymphony .xwork2 .interceptor .ModelDrivenInterceptor .intercept ( ModelDrivenInterceptor .java : 74 ) at com .opensymphony .xwork2 .DefaultActionInvocation $ 2.doProfiling ( DefaultActionInvocation .java : 224 ) at com .opensymphony .xwork2 .DefaultActionInvocation $ 2.doProfiling ( DefaultActionInvocation .java : 223 )有时候虽然不是很影响使用，但是看着总是感觉不爽。自己在网上也搜索一番，发现解决方案大概有两种：
方案一：
因为tomcat8没有属性resourceEntries，换成tomcat7就好了。但是从tomcat8==>tomcat7感觉在退步，果断拒绝此方法。
参考链接：http://blog.csdn.net/findbestoy/article/details/50756465
方案二：
升级struts版本，struts2.0.9==>struts2.3.20，完美解决问题，坚决采纳本方法!
struts2.3.20下载地址：http://download.csdn.net/detail/xyznad/9486393
参考链接：http://blog.csdn.net/bigtree_3721/article/details/50866958
