严重: Servlet.service() for servlet [jsp] in context with path [/qq] threw excepti

问题描述

16:<trheight="29"><tdbackground="/qq/images/left_T.jpg"style="text-indent:45;padding-top:8"><b><fontcolor="white">博主信息</font></b></td></tr>17:<trheight="40">18:<tdbackground="/Blog/images/left_M.jpg"style="text-indent:30">19:博主姓名：<%=((MasterBean)session.getAttribute("master")).getMasterName()%>20:</td>21:</tr>22:<trheight="40">Stacktrace:]withrootcausejava.lang.NullPointerExceptionatorg.apache.jsp.front.article.ArticleIndex_jsp._jspService(ArticleIndex_jsp.java:155)atorg.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:727)atorg.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)atorg.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)atorg.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)atjavax.servlet.http.HttpServlet.service(HttpServlet.java:727)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)atorg.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)atorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)atorg.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)atorg.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)atorg.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)atorg.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)atjava.util.concurrent.ThreadPoolExecutor.runWorker(UnknownSource)atjava.util.concurrent.ThreadPoolExecutor$Worker.run(UnknownSource)atorg.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)atjava.lang.Thread.run(UnknownSource)

解决方案

解决方案二：
出现nul了看看session.getAttribute("master")是什么？
解决方案三：
((MasterBean)session.getAttribute("master"))这一部分非空不？进行下非空判断，然后再获取getMasterName()

时间： 2024-09-20 00:02:20

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