文件都更新了,但是页面显示不出,跟踪后感觉,他文件更新操作做完就抛错了,没做到业务层,错误如下: javax.servlet.servletexception: サーブレットの実行により例外を投げました at org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:220) at org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:144) at org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:209) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:595) at org.apache.catalina.core.standardpipeline.invoke(standardpipeline.java:432) at org.apache.catalina.core.containerbase.invoke(containerbase.java:954) at org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:138) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:595) at org.apache.catalina.core.standardpipeline.invoke(standardpipeline.java:432) at org.apache.catalina.core.containerbase.invoke(containerbase.java:954) at org.apache.catalina.core.standardcontext.invoke(standardcontext.java:2459) at org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:132) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:595) at org.apache.catalina.valves.errordispatchervalve.invoke(errordispatchervalve.java:118) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:593) at org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:116) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:593) at org.apache.catalina.core.standardpipeline.invoke(standardpipeline.java:432) at org.apache.catalina.core.containerbase.invoke(containerbase.java:954) at org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:126) at org.apache.catalina.core.standardpipeline$standardpipelinevalvecontext.invokenext(standardpipeline.java:595) at org.apache.catalina.core.standardpipeline.invoke(standardpipeline.java:432) at org.apache.catalina.core.containerbase.invoke(containerbase.java:954) at org.apache.coyote.tomcat4.coyoteadapter.service(coyoteadapter.java:152) at org.apache.coyote.http11.http11processor.process(http11processor.java:869) at org.apache.coyote.http11.http11baseprotocol$http11connectionhandler.processconnection(http11baseprotocol.java:664) at org.apache.tomcat.util.net.pooltcpendpoint.processsocket(pooltcpendpoint.java:527) at org.apache.tomcat.util.net.leaderfollowerworkerthread.runit(leaderfollowerworkerthread.java:80) at org.apache.tomcat.util.threads.threadpool$controlrunnable.run(threadpool.java:684) at java.lang.thread.run(thread.java:534)