问题描述
我运行后，出现：严重:Servlet.service()forservletjspthrewexceptionjava.lang.NullPointerExceptionatorg.apache.jsp.f_005fleft_jsp._jspService(f_005fleft_jsp.java:117)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)atorg.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)atorg.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)atorg.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)atorg.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)atorg.apache.jsp.index_jsp._jspService(index_jsp.java:87)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)atorg.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)atorg.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)atorg.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)atjava.lang.Thread.run(UnknownSource)2010-5-1216:21:18org.apache.catalina.core.StandardWrapperValveinvoke严重:Servlet.service()forservletjspthrewexceptionjava.lang.NullPointerExceptionatorg.apache.jsp.f_005fleft_jsp._jspService(f_005fleft_jsp.java:117)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)atorg.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)atorg.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)atorg.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)atorg.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)atorg.apache.jsp.index_jsp._jspService(index_jsp.java:87)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:717)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil
解决方案
解决方案二：
atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)这里的空指针