菜鸟求问:这是什么问题?缺jar包吗?

败类成风 发布于 2016/03/14 09:47
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@Jieven 你好,想跟你请教个问题:

java.lang.NullPointerException
at com.eova.widget.WidgetUtil.copyValueColumn(Unknown Source)
at com.eova.widget.grid.GridController.query(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.jfinal.aop.Invocation.invoke(Invocation.java:71)
at com.eova.interceptor.LoginInterceptor.intercept(Unknown Source)
at com.jfinal.aop.Invocation.invoke(Invocation.java:65)
at com.jfinal.core.ActionHandler.handle(ActionHandler.java:74)
at com.jfinal.ext.handler.ContextPathHandler.handle(ContextPathHandler.java:47)
at com.jfinal.plugin.druid.DruidStatViewHandler.handle(DruidStatViewHandler.java:75)
at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
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:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)


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0
星魂蓝
不是报空指针么,你用了没有实例化的对象吧
0
憨豆公子
憨豆公子
空指针,打个断点看看com.eova.widget.grid.GridController.query
0
王柏宇
王柏宇
com.eova.widget.grid.GridController.query 没有查到东西吧。
0
pang2841641
pang2841641
用system.out输出对象,看看是哪个对象报空指针了吧
0
求是科技
求是科技
空指针,引起空指针的原因很多,我最近遇到一个排查了很久,xml文件里面少写了个"/>",不知道你属于哪一种
0
keppy
keppy
这种问题都好意思放上来???
0
Jieven
Jieven
JFinal 快速开发平台 EOVA 424665115
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0
WendZhao
WendZhao
空指针,最好先判断一下
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