【已解决】org.apache.ibatis.exceptions.PersistenceException:报错

我就是我 2024-03-26 17:14 25阅读 0赞

本博文源于笔者正在学习的mybatis，今天在分部查询的时候，想要测试执行的时候，报了一个错。org.apache.ibatis.exceptions.PersistenceException:  
Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atguigu.mybatis.mapper.DeptMapper.getEmpAndDeptByStepTwo  
The error may exist in mappers/EmpMapper.xml

### 问题来源 ###

员工表与员工表建立了一对多的连接，想要通过分部查询，查询出制定员工的部门信息，在进行测试的时候报了一个错误。

"C:\Program Files\Java\jdk1.8.0_192\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.2\lib\idea_rt.jar=13893:C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.2\lib\idea_rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.2\plugins\junit\lib\junit5-rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2019.3.2\plugins\junit\lib\junit-rt.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_192\jre\lib\rt.jar;C:\Users\Administrator\IdeaProjects\mybatis2\MyBatis_demo3\target\test-classes;C:\Users\Administrator\IdeaProjects\mybatis2\MyBatis_demo3\target\classes;C:\Users\Administrator\.m2\repository\org\mybatis\mybatis\3.5.7\mybatis-3.5.7.jar;C:\Users\Administrator\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\Administrator\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.3\mysql-connector-java-5.1.3.jar;C:\Users\Administrator\.m2\repository\log4j\log4j\1.2.17\log4j-1.2.17.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit4 ResultMapTest,testgetEmpAndDeptByStepTwo
    DEBUG 03-03 16:58:59.135 ==>  Preparing: select * from t_emp where eid = ?(BaseJdbcLogger.java:137) 
    DEBUG 03-03 16:58:59.213 ==> Parameters: 1(Integer)(BaseJdbcLogger.java:137) 
    
    org.apache.ibatis.exceptions.PersistenceException: 
    ### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atguigu.mybatis.mapper.DeptMapper.getEmpAndDeptByStepTwo
    ### The error may exist in mappers/EmpMapper.xml
    ### The error may involve com.atguigu.mybatis.mapper.EmpMapper.getEmpAndDeptByStepOne
    ### The error occurred while handling results
    ### SQL: select * from t_emp where eid = ?
    ### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atguigu.mybatis.mapper.DeptMapper.getEmpAndDeptByStepTwo
    
    	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:153)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:145)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:76)
    	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87)
    	at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:145)
    	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:86)
    	at com.sun.proxy.$Proxy6.getEmpAndDeptByStepOne(Unknown Source)
    	at ResultMapTest.testgetEmpAndDeptByStepTwo(ResultMapTest.java:41)
    	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$2.evaluate(ParentRunner.java:268)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
    Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atguigu.mybatis.mapper.DeptMapper.getEmpAndDeptByStepTwo
    	at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:1031)
    	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:821)
    	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:814)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getNestedQueryMappingValue(DefaultResultSetHandler.java:783)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getPropertyMappingValue(DefaultResultSetHandler.java:505)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyPropertyMappings(DefaultResultSetHandler.java:481)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:405)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:355)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:329)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:302)
    	at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:195)
    	at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:65)
    	at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
    	at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:63)
    	at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:325)
    	at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
    	at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:89)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:151)
    	... 30 more
    
    
    Process finished with exit code -1

### 问题解决方案 ###

因为分部查询用到了两个mapper.xml，所以两个mapper.xml注册一下，之前笔者没有注册就报错了，现在1注册进去，就没有报错。  
![在这里插入图片描述][f89400d468ee4f3daee99fbc1c1c81c3.png]

[f89400d468ee4f3daee99fbc1c1c81c3.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/26/cc3923d1c8474c8283fa4a016b016ca0.png