运行工程所有页面老是出这个问题

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:356)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:140)
org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:355)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:259)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:141)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:248)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:49)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:124)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:170)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:170)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:104)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:84)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:208)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:88)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:127)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:230)
com.opensymphony.xwork2.DefaultActionInvocation$1.doProfiling(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:456)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:227)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:137)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)