qq_43037983
qq_43037983
采纳率66.7%
2018-10-23 07:54

EL表达式问题导致页面报500,取值需要加用${requestScope.id}的形式才正常

已采纳

Error 500--Internal Server Error

java.lang.NullPointerException
at com.sun.faces.context.ApplicationMap.get(ApplicationMap.java:97)
at com.sun.faces.application.ApplicationAssociate.getInstance(ApplicationAssociate.java:247)
at com.sun.faces.application.ApplicationAssociate.getCurrentInstance(ApplicationAssociate.java:277)
at com.sun.faces.el.ManagedBeanELResolver.getBeanManager(ManagedBeanELResolver.java:228)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:235)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.faces.el.ChainTypeCompositeELResolver.getValue(ChainTypeCompositeELResolver.java:94)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:103)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
at weblogic.servlet.jsp.ELHelper.evaluate(ELHelper.java:32)
at jsp_servlet._web_45_inf._jsp._shipmgmt.__shipmodapprv_list._jspService(__shipmodapprv_list.java:89)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:242)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:216)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:132)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:338)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:221)
at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:564)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:263)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1216)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1001)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:844)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:242)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:216)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:132)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:338)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:74)
at com.yunda.app.util.platform.filter.LoginAndAuthFilter.doFilter(LoginAndAuthFilter.java:156)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:74)
at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:167)
at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:80)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:74)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:74)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3288)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3254)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:57)
at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2163)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2089)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2074)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1513)
at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:254)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

本地开发使用tomcat,通过${id}取值是没有任何问题,但是上uat之后服务器用的是welogic通过${id}的形式取值页面会报空指针,需要用${requestScope.id}的方式取值才不会报错,搞不懂是因为什么导致的

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3条回答

  • weixin_39808420 世纪怪咖 3年前

    requestScope是作用域 啊,是从里面取得,不然直接写id取不到呀

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  • qq_43037983 qq_43037983 3年前

    <[ServletContext@1611250164[app:dms module:dms path:null spec-version:3.0]] Root cause of ServletException.
    java.lang.NullPointerException
    at com.sun.faces.context.ApplicationMap.get(ApplicationMap.java:97)
    at com.sun.faces.application.ApplicationAssociate.getInstance(ApplicationAssociate.java:247)
    at com.sun.faces.application.ApplicationAssociate.getCurrentInstance(ApplicationAssociate.java:277)
    at com.sun.faces.el.ManagedBeanELResolver.getBeanManager(ManagedBeanELResolver.java:228)
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:235)
    Truncated. see log file for complete stacktrace

    这是weblogic日志
    还有,页面不会一直报500,刷新10次可能会有几次报错

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  • qq_23126581 郭老师的小迷弟雅思莫了 3年前

    java.lang.NullPointerException 都空指针了。

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