Cannot commit, transaction is already closed

##mybatis

org.apache.ibatis.exceptions.PersistenceException:

Error committing transaction. Cause: org.apache.ibatis.executor.ExecutorException: Cannot commit, transaction is already closed

Cause: org.apache.ibatis.executor.ExecutorException: Cannot commit, transaction is already closed

at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.commit(DefaultSqlSession.java:226)
at org.apache.ibatis.session.defaults.DefaultSqlSession.commit(DefaultSqlSession.java:217)
at test.UserinfoTest.findAllUserinfoTest(UserinfoTest.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)

Caused by: org.apache.ibatis.executor.ExecutorException: Cannot commit, transaction is already closed
at org.apache.ibatis.executor.BaseExecutor.commit(BaseExecutor.java:239)
at org.apache.ibatis.executor.CachingExecutor.commit(CachingExecutor.java:119)
at org.apache.ibatis.session.defaults.DefaultSqlSession.commit(DefaultSqlSession.java:223)
… 24 more

Process finished with exit code -1

明明有四个数据，为什么只给我输出了两个数据

去掉sqlSession.commit();

我目前不知道书上为什么写着sqlSession.commit()，难道查找需要执行sqlSession.commit();

去掉sqlSession.commit();之后发现全部数据都能显示出来，

不甘心，于是网上搜了一下

https://blog.csdn.net/bw1023627606/article/details/103291248