1、报错

D:\java\jdk8\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\IDEA\IntelliJ IDEA 2020.1.4\lib\idea_rt.jar=56613:D:\IDEA\IntelliJ IDEA 2020.1.4\bin" -Dfile.encoding=UTF-8 -classpath "D:\IDEA\IntelliJ IDEA 2020.1.4\lib\idea_rt.jar;D:\IDEA\IntelliJ IDEA 2020.1.4\plugins\junit\lib\junit5-rt.jar;D:\IDEA\IntelliJ IDEA 2020.1.4\plugins\junit\lib\junit-rt.jar;D:\java\jdk8\jre\lib\charsets.jar;D:\java\jdk8\jre\lib\deploy.jar;D:\java\jdk8\jre\lib\ext\access-bridge-64.jar;D:\java\jdk8\jre\lib\ext\cldrdata.jar;D:\java\jdk8\jre\lib\ext\dnsns.jar;D:\java\jdk8\jre\lib\ext\jaccess.jar;D:\java\jdk8\jre\lib\ext\jfxrt.jar;D:\java\jdk8\jre\lib\ext\localedata.jar;D:\java\jdk8\jre\lib\ext\nashorn.jar;D:\java\jdk8\jre\lib\ext\sunec.jar;D:\java\jdk8\jre\lib\ext\sunjce_provider.jar;D:\java\jdk8\jre\lib\ext\sunmscapi.jar;D:\java\jdk8\jre\lib\ext\sunpkcs11.jar;D:\java\jdk8\jre\lib\ext\zipfs.jar;D:\java\jdk8\jre\lib\javaws.jar;D:\java\jdk8\jre\lib\jce.jar;D:\java\jdk8\jre\lib\jfr.jar;D:\java\jdk8\jre\lib\jfxswt.jar;D:\java\jdk8\jre\lib\jsse.jar;D:\java\jdk8\jre\lib\management-agent.jar;D:\java\jdk8\jre\lib\plugin.jar;D:\java\jdk8\jre\lib\resources.jar;D:\java\jdk8\jre\lib\rt.jar;D:\IDEA1\mybatis\mybatis-01\target\test-classes;D:\IDEA1\mybatis\mybatis-01\target\classes;D:\Maven_repository\org\mybatis\mybatis\3.5.3\mybatis-3.5.3.jar;D:\Maven_repository\mysql\mysql-connector-java\8.0.16\mysql-connector-java-8.0.16.jar;D:\Maven_repository\com\google\protobuf\protobuf-java\3.6.1\protobuf-java-3.6.1.jar;D:\Maven_repository\junit\junit\4.12\junit-4.12.jar;D:\Maven_repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 com.chen.dao.PersonTestorg.apache.ibatis.binding.BindingException: Type interface com.chen.dao.PersonDao is not known to the MapperRegistry.at org.apache.ibatis.binding.MapperRegistry.getMapper(MapperRegistry.java:47)at org.apache.ibatis.session.Configuration.getMapper(Configuration.java:779)at org.apache.ibatis.session.defaults.DefaultSqlSession.getMapper(DefaultSqlSession.java:291)at com.chen.dao.PersonTest.test(PersonTest.java:18)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)Process finished with exit code -1

2、原因

我们在学习mybatis的过程中，往往都会遇到这个错误，出现错误的原因是没有在mybatis的核心配置文件中注册!!!

3、解决办法：在核心配置文件中

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