http://prj7cxlp7.bkt.clouddn.com/1559617120217.jpeg
Base [condition=null, limit=null, orderBy=null]
guidepage.dao.GuidePageDAOImpl@30921ae5
六月 04, 2019 10:58:43 上午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [guideGet] in context with path [/MallWeb] threw exception
java.lang.NullPointerException
at java.util.ArrayList.addAll(Unknown Source)
at common.pojo.JsonRs.(JsonRs.java:50)
at guidepage.service.GuidePageServiceImpl.selectByPage(GuidePageServiceImpl.java:31)
at guidepage.action.Get.doPost(Get.java:53)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1152)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2527)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2516)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Base [condition=null, limit=null, orderBy=null] 看到没参数都为空null
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java.lang.NullPointerException 这个是空指针异常
GuidePageServiceImpl.selectByPage(GuidePageServiceImpl.java:31) 这个是你的查询分页数据的方法。 找到GuidePageServiceImpl.java:31 第31行代码
我不知道你怎么控制的，limit 这个当为null的时候不要传，在sql里判断下。或者后台拼接sql。其他参数也一样，为null就不做这个条件限制
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