mybatis bug之org.apache.ibatis.exceptions.PersistenceException:

详细报错信息:

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.IllegalArgumentException: findAllList is ambiguous in Mapped Statements collection (try using the full name including the namespace, or rename one of the entries)
### Cause: java.lang.IllegalArgumentException: findAllList is ambiguous in Mapped Statements collection (try using the full name including the namespace, or rename one of the entries)

    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98)
    at com.ahd.Test.test.test(test.java:26)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    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$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.IllegalArgumentException: findAllList is ambiguous in Mapped Statements collection (try using the full name including the namespace, or rename one of the entries)
    at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:800)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:631)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:624)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
    ... 25 more

解决总结:

         findAllList is ambiguous in Mapped Statements collection (try using the full name including the namespace, or rename one of the entries)

         findAllList在映射语句集合中是不明确的(尝试使用包含名称空间的全名，或者重命名其中一个条目)

1. Persistence Exception 持久化 异常
2. 持久化异常这种bug一般都是xml文件配置有错误,
3. 测试时:主配置文件使用包名找xml文件,直接写映射文件名称没有问题,通过包扫描有问题

<!--第一种:写映射文件的名字-->
<!--
        <mapper resource="com/ahd/mapper/UserMapper.xml"></mapper>
-->
        <!--第二种:写类名,一定要有个映射文件与之对应
        如果没有，那么在UserMapper要声明注解-->
        <!--<mapper class="com.gyf.mapper.UserMapper"></mapper>-->

        <!--第三种：可以写包名-->
        <package name="com.ahd.mapper"></package>

4. *****(方法名) is ambiguous in Mapped Statements collection (try using the full name including the namespace, or rename one of the entries)

本次错误是因为系统找不到findAllList对应的映射

5.查看发现多个***mapper.xml都有这个方法,系统不知道使用的是哪一个,将findAllList方法加上路径即可