com.justep.baas.action.CRUD.sqlQuery(Unknown Source)报错求解决方案

风卓羽

1. 四月 25, 2017 1:44:01 下午 org.apache.catalina.core.StandardWrapperValve invoke
   
2. 严重: Servlet.service() for servlet WeX5_Baas_Servlet threw exception
   
3. java.lang.NullPointerException
   
4.         at com.justep.baas.action.CRUD.sqlQuery(Unknown Source)
   
5.         at manna.Porder__do.mdetailSum(Porder__do.java:363)
   
6.         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   
7.         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   
8.         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   
9.         at java.lang.reflect.Method.invoke(Method.java:497)
   
10.         at com.justep.baas.action.Engine.execAction(Unknown Source)
    
11.         at com.justep.baas.action.Engine.execAction(Unknown Source)
    
12.         at com.justep.baas.servlet.BaasServlet.execService(Unknown Source)
    
13.         at com.justep.baas.servlet.BaasServlet.service(Unknown Source)
    
14.         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    
15.         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    
16.         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    
17.         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    
18.         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    
19.         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    
20.         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    
21.         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    
22.         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
    
23.         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
    
24.         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    
25.         at java.lang.Thread.run(Thread.java:745)
    
26. 
    
27. com.justep.baas.action.ActionException: Action[manna/porder/mdetailSum]执行失败，null
    
28.         at com.justep.baas.action.Engine.execAction(Unknown Source)
    
29.         at com.justep.baas.action.Engine.execAction(Unknown Source)
    
30.         at com.justep.baas.servlet.BaasServlet.execService(Unknown Source)
    
31.         at com.justep.baas.servlet.BaasServlet.service(Unknown Source)
    
32.         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    
33.         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    
34.         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    
35.         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    
36.         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    
37.         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    
38.         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    
39.         at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    
40.         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
    
41.         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
    
42.         at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    
43.         at java.lang.Thread.run(Thread.java:745)
    
44. Caused by: java.lang.reflect.InvocationTargetException
    
45.         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    
46.         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    
47.         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    
48.         at java.lang.reflect.Method.invoke(Method.java:497)
    
49.         ... 16 more
    
50. Caused by: java.lang.NullPointerException
    
51.         at com.justep.baas.action.CRUD.sqlQuery(Unknown Source)
    
52.         at manna.Porder__do.mdetailSum(Porder__do.java:363)
    
53.         ... 20 more
    

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昨天还运行的好好的，今天运行就报这个错，但是data组件的数据还是正常加载了，就是一进入页面就会报一下错，追踪源码也看不出个所以然，这个异常是这里抛出的

1. <blockquote>public static JSONObject mdetailSum(JSONObject params, ActionContext context) throws Exception{

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看半天了，找不到头绪，求大神援手~

半导体

你这里报了一个空指针异常  Java调试跟一下你的代码

风卓羽

半导体 发表于 2017-4-25 14:05
你这里报了一个空指针异常  Java调试跟一下你的代码

不知道怎么跟踪调试，我在CRUD.java的源码里加system.out.print，但是编译运行不起作用，不知道这个null是哪里空值

半导体

风卓羽 发表于 2017-4-25 21:26
不知道怎么跟踪调试，我在CRUD.java的源码里加system.out.print，但是编译运行不起作用，不知道这个null ...

http://docs.wex5.com/bex5-studio-question-list-10007/