Plulo 2021-12-22 18:49 采纳率: 100%
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已结题

在myeclipse2017中运行时一直报错

十二月 22, 2021 6:38:47 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [indexSelect] in context with path [/FlowerShop] threw exception
java.lang.NullPointerException
at com.hr.dao.EASYBUY_PRODUCT_CATEGORYDao.selectFather(EASYBUY_PRODUCT_CATEGORYDao.java:108)
at com.hr.Servlet.IndexSelectServlet.service(IndexSelectServlet.java:26)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

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  • CSDN专家-sinJack 2021-12-22 19:00
    关注

    java.lang.NullPointerException
    at com.hr.dao.EASYBUY_PRODUCT_CATEGORYDao.selectFather(EASYBUY_PRODUCT_CATEGORYDao.java:108)
    EASYBUY_PRODUCT_CATEGORYDao类108行错误对象为空,导致空指针异常。

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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  • 系统已结题 12月30日
  • 已采纳回答 12月22日
  • 创建了问题 12月22日

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