exception javax.servlet.ServletException com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:284) com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:202) com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119) com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55) com.opensymphony.webwork.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:88)
root cause
java.lang.reflect.InvocationTargetException sun.reflect.GeneratedMethodAccessor2395.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) java.lang.reflect.Method.invoke(Method.java:324) com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:358) com.opensymphony.xwork.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:218) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:192) com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:175) com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:115) com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.webwork.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:174) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.webwork.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:169) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:151) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:186) com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190) com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116) com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:273) com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:202) com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119) com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55) com.opensymphony.webwork.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:88) 从网上搜索相关的出错信息。发现，这是由于配置文件不正确或者是没有找到相关方法才引起的出错。 所以本人，对自己项目工程的配置文件逐一核对后，发现也没有问题呀，，但是看到最下面一句。。note The full stack trace of the root cause is available in the Apache Tomcat/5.0.30 logs.
去看看TOMCAT的日志中记载着什么呢？
猛一看，才明白。因为别人更新JAVA类，把我原来的方法给删除掉了。。没有保留下来。。所有找不到方法。。
但是常理，没有找到方法，应该抛出才对呀。。为什么不在异常信息处显示呢？
Caused by: java.lang.NoSuchMethodError: