Java. Lang. nullpointerexception at Oracle. JDBC. Driver. scrollableresultset. Close (scrollableresultset.

Java. Lang. nullpointerexception
At oracle. JDBC. Driver. scrollableresultset. Close (scrollableresultset. Java: 149)
At org. Apache. tomcat. DBCP. DBCP. delegatingresultset. Close (delegatingresultset. Java: 152)
At com. Unify. Common. Page. exportalldata (page. Java: 234)

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The following is useful information (COM. Unify. Common. Page is a class written by ourselves)

I encountered this problem today and found

I found the cause in the morning and hoped to help my friends who encountered the same problem.

The reason is that the version of the Oracle driver class12.jar in the project is different from the version of class12.jar In the lib directory of Tomcat (Tomcat is too low to support)

 

 

 

This was transplanted from the previous system, and another colleague was working together.

There will be problems on his side, not on my side. The browser issues can be ruled out.

It is probably an environment problem, but I don't know where it is.

So I checked JDK and excluded

I found it on the Internet. I don't quite understand it. It cannot be bypassed,

Finally, I tried to read the error description carefully because

Oracle. JDBC. Driver. scrollableresultset, so you can find the package where it is located and check whether this package exists in Tomcat. If so, the problem may occur. Sure enough.