Could not find resource com/cth/dao/UserImpl.xml 单映射文件找不到

报错：

### The error may exist in com/cth/dao/UserImpl.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/cth/dao/UserImpl.xml
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)
	at com.cth.domain.User.main(User.java:17)
	……

原因

因为com/cth/dao/下的UserImpl.xml文件没有被编译到target/classes目录下对应的目录中，不信你可以在项目中的target/classes目录下找一找，绝对是找不到的

解决方法：

1. 方法一：将com/cth/dao目录下的文件放到resource目录下

2. 方法二：在pom文件中添加以下代码

   <build>
       <resources>
         <resource>
           <directory>src/main/java</directory>
           <includes>
             <include>**/*.properties</include>
             <include>**/*.xml</include>
           </includes>
           <filtering>false</filtering>
         </resource>
       </resources>
     </build>