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Java图书答疑

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所属版块： Java答疑区

刘盛旺

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《Java项目开发案例全程实录》第八章医药管理系统

发表在Java图书答疑 2013-03-29

是否精华是否

版块置顶: 是否

在运行《Java项目开发案例全程实录》第八章医药管理系统中的 “医药管理”中的“查看库存”时点击“下一页”出错。严重: Servlet.service() for servlet action threw exception
java.lang.NullPointerException
at com.lyq.struts.action.RequireAction.blurQuery(RequireAction.java:181)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at com.lyq.struts.action.BaseAction.execute(BaseAction.java:42)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.lyq.util.HibernateFilter.doFilter(HibernateFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.lyq.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:36)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)

请问老师，改如何解决此问题？谢谢！

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无语_mrkj

学分：3155 LV11

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2013-04-17

沙发

请问其他功能都好使吗？

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佚名

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TA的每日心情

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2021-07-05 14:21:40

2013-06-09

板凳

[FIELDSET][LEGEND]引自：1楼[/LEGEND]
请问其他功能都好使吗？
[/FIELDSET]

回复：
发布的时候就这样：
HTTP Status 500 - java.lang.NullPointerException

type Exception report

message java.lang.NullPointerException

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
com.lyq.util.HibernateFilter.doFilter(HibernateFilter.java:36)
com.lyq.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:35)
root cause

java.lang.NullPointerException
org.apache.struts.taglib.TagUtils.retrieveMessageResources(TagUtils.java:1175)
org.apache.struts.taglib.TagUtils.message(TagUtils.java:1038)
org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:224)
org.apache.jsp.login_jsp._jspx_meth_bean_005fmessage_005f0(login_jsp.java:238)
org.apache.jsp.login_jsp._jspx_meth_html_005fhtml_005f0(login_jsp.java:133)
org.apache.jsp.login_jsp._jspService(login_jsp.java:100)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
com.lyq.util.HibernateFilter.doFilter(HibernateFilter.java:36)
com.lyq.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:35)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.33 logs.

Apache Tomcat/7.0.33

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