Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource

报错内容

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in com/casey/mapper/UserMapper.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/casey/mapper/UserMapper.xml
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:82)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:66)
	at com.casey.UserMapper.main(UserMapper.java:18)
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/casey/mapper/UserMapper.xml
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:122)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)
	... 2 more
Caused by: java.io.IOException: Could not find resource com/casey/mapper/UserMapper.xml
	at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:114)
	at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:100)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:378)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:120)
	... 4 more

报错说找不到我 xml 文件，上网查询后，发现是 idea 的 bug，src 的 xml 要通过编译必须在 pom.xml 的 build 结点加上这一段

 <build>
 	<!-- 配置idea可以编辑src/main/java下的xml文件 -->
	  <resources>
	      <resource>
	          <directory>src/main/java</directory>
	          <includes>
	              <include>*/**/*.xml</include>
	          </includes>
	          <filtering>true</filtering>
	      </resource>
	  </resources>
</build>

再次编译还是一样的报错，但是 target 的 xml 已经有了，只是目录的层次错误了

此时我看见了这篇 blog
mybatis- Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource
我寻思咱们应该是同一个问题，于是我也重建了目录，不行；重建模块，不行。

---

后来才发现，加的 build 结点那一段，我自己路径没配好。。好蠢噢

<resource>
	<!-- directory：指定资源文件的位置 -->
	<directory>src/main/java</directory>
	<includes>
	    <!-- “**” 表示任意级目录    “*”表示任意文件 -->
	    <!-- mvn resources:resources　：对资源做出处理，先于compile阶段  -->
	    <include>*/*/**/*.xml</include>
	</includes>
	<!--  filtering：开启过滤，用指定的参数替换directory下的文件中的参数(eg. ${name}) -->
	<filtering>false</filtering>
</resource>

这样就可以了~