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

问题描述

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atxiaoming.dao.Tb_bbsDao.addTb_bbs
	at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:672)
	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:507)
	at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:500)
	at org.apache.ibatis.binding.MapperMethod.setupCommandType(MapperMethod.java:240)
	at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:71)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:39)
	at com.sun.proxy.$Proxy3.addTb_bbs(Unknown Source)
	at com.atxiaoming.Test.bbsTest.testAdd(bbsTest.java:43)
	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)

java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for com.atxiaoming.dao.Tb_bbsDao.addTb_bbs
这句话的意思是找不到这个方法执行,因为我们没有为它写实现类,而是以mapper的形式

造成原因

第一种:mapper的namespace写错

解决办法

好好检查一下
第二种:dao接口和mapper实现的方法名不对应
就像这样子:
dao

mapper:

可见两个名字对应不上

解决办法

把两个名字改成一样的,像下面的删除一样