页面显示null报错?
在表单中有很多项目名,随便选择其中一个进行链接,有的项目可以正常链接显示页面,有的报以下错:

null    
详细内容
 

org.apache.jasper.JasperException   at   org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)   at   org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)   at   org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)   at   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)   at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)   at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)   at   org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:704)   at   org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:474)   at   org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:409)   at   org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)   at   org.loushang.waf.mvc.ServletDispatcherForward.forward(ServletDispatcherForward.java:70)   at   org.loushang.waf.mvc.CommandSupport.forward(CommandSupport.java:94)   at   org.loushang.waf.mvc.CommandSupport.execute(CommandSupport.java:136)   at   org.loushang.waf.mvc.ServletDispatcher.service(ServletDispatcher.java:172)   at   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)   at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)   at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)   at   org.loushang.bsp.permit.pep.intercept.web.SecurityEnforcementFilter.doFilter(SecurityEnforcementFilter.java:97)   at   org.loushang.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:47)   at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)   at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)   at   org.loushang.bsp.permit.pep.ui.AbstractIntegrationFilter.doFilter(AbstractIntegrationFilter.java:201)   at   org.loushang.bsp.permit.pep.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:47)   at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)   at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)   at   org.loushang.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:75)   at   org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)   at   org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)   at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)   at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)   at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)   at   org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)   at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)   at   org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)   at   org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)   at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)   at   org.apache