idea+mybatis The error may exist in com/XXXX/dao/UserDaoMapper.xml

 報錯信息以下

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException: 
### Error building SqlSession.
### The error may exist in com/XXXX/dao/UserDaoMapper.xml
### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/bdqn/dao/UserDaoMapper.xml
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:79)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:63)
	at com.bdqn.TestStudent.main(TestStudent.java:37)
Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/bdqn/dao/UserDaoMapper.xml
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:106)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:89)
	at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:77)
	... 2 more
Caused by: java.io.IOException: Could not find resource com/bdqn/dao/UserDaoMapper.xml
	at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:108)
	at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:95)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.mapperElement(XMLConfigBuilder.java:315)
	at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:104)
	... 4 more

緣由

    找不到mapper文件由於idea默認會在resource中尋找配置文件

解決辦法一：

在pom中的<build>標籤中加以下信息

<resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
    </resources>

解決辦法二：

在resource文件中寫mapper文件，路徑和箭頭所指一致

項目結構：

上圖中UserDaoMapper用第一種解決辦法

StudentMapper用第二種解決辦法實現