大家快进来看看！！

[feikecmy]

这段错误提示是什么意思？有什么办法解决？
500 Internal Server Error
/demo/11.jsp:

null
java.lang.NullPointerException
at jrun__112ejsp7._jspService(jrun__112ejsp7.java:64)
at allaire.jrun.jsp.HttpJSPServlet.service(HttpJSPServlet.java:40)
at allaire.jrun.servlet.JRunSE.service(JRunSE.java:1013)
at allaire.jrun.servlet.JRunSE.runServlet(JRunSE.java:925)
at allaire.jrun.servlet.JRunNamedDispatcher.forward(JRunNamedDispatcher.java:34)
at allaire.jrun.jsp.JSPServlet.service(JSPServlet.java:175)
at allaire.jrun.servlet.JRunSE.service(JRunSE.java:1013)
at allaire.jrun.servlet.JRunSE.runServlet(JRunSE.java:925)
at allaire.jrun.servlet.JRunRequestDispatcher.forward(JRunRequestDispatcher.java:88)
at allaire.jrun.servlet.JRunSE.service(JRunSE.java:1131)
at allaire.jrun.servlet.JvmContext.dispatch(JvmContext.java:330)
at allaire.jrun.http.WebEndpoint.run(WebEndpoint.java:107)
at allaire.jrun.ThreadPool.run(ThreadPool.java:272)
at allaire.jrun.WorkerThread.run(WorkerThread.java:75)

[newhu]

有几种情况：字符串转化、字符串比较
你仔细检查一下这两个环节就OK了

[leek2000]

不能为空的地方是空值，比如传值为空等