mapperLocations属性通配符classpath*

在classpath后面的*必不可少，缺少型号的话后面的通配符不起作用。

**表示可以表示任意多级目录，如：上述配置可以查到【com/huaxin/framework/system/dao/UserDaoMapper.xml】

            *表示多个任意字符

注意：value=“classpath*:com/huaxin/**/*Mapper.xml” ，.xml前面必须有字母.

如果写成 value=“classpath*:com/huaxin/**/*.xml” 会报错。

五月 14, 2021 9:31:49 下午 org.apache.ibatis.logging.commons.JakartaCommonsLoggingImpl warn
警告: Property mapperLocations was specified but matching resources are not found.



org.apache.ibatis.binding.BindingException: Type interface com.jing.dao.UserMapper 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.mybatis.spring.SqlSessionTemplate.getMapper(SqlSessionTemplate.java:312)
	at com.jing.dao.UserDaoImpl.getUsers(UserDaoImpl.java:16)
	at com.jing.dao.MyTest.test1(MyTest.java:42)
	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$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$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)

classpath：只会到你的class路径中查找找文件; classpath*：不仅包含class路径，还包括jar文件中(class路径)进行查找 自己稍微深度理解:A–>B–>C 在B中没有配置文件的情况下 A中classpath* 加载到jar包B中的配置文件,C加载自己配置文件要用classpath* 否则A中加载配置文件无法加载到C中的配置文件