解决Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value的问题

问题描述org.apache.ibatis.exceptions.PersistenceException:### Error updating database.Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for Tb_bbsDao.addTb_bbs

UMT、梦

1642人浏览 · 2020-06-08 17:23:47

UMT、梦 · 2020-06-08 17:23:47 发布

问题描述

org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for Tb_bbsDao.addTb_bbs
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for Tb_bbsDao.addTb_bbs
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:147)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:134)
	at com.xiaoming.daoImpl.Tb_bbsDaoImpl.addTb_bbs(Tb_bbsDaoImpl.java:47)
	at com.atxiaoming.Test.bbsTest.testUseImpl(bbsTest.java:42)
	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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for Tb_bbsDao.addTb_bbs
	at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:672)
	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:507)
	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:500)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:144)
	... 27 more

产生原因:

造成这个错误的原因是最终mapper拼接错误
mapper在执行操作的时候是以namespace.+后面传入的值进行检索
这里我的namespace结尾就是Tb_bbsDao
在这里插入图片描述
结果在执行实现类的时候

又多了一个Tb_bbsDao
最终的结果就是Tb_bbsDao.Tb_bbsDao
重复了,那肯定就找不到了