[MyBatis]mapperLocations属性通配符的使用 _的使用

知识养成了思想,思想同时又在融化知识。这篇文章主要讲述[MyBatis]mapperLocations属性通配符的使用相关的知识，希望能为你提供帮助。
mapperLocations属性通配符的使用
示例：

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< bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
< property name="dataSource" ref="dataSource" />
< property name="configLocation" value="https://www.songbingjia.com/android/classpath:sqlMapConfig.xml"> < /property>
< property name="mapperLocations" value="https://www.songbingjia.com/android/classpath*:com/huaxin/**/*Mapper.xml"> < /property>
< /bean>

< bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> < property name="dataSource" ref="dataSource" /> < property name="configLocation" value="https://www.songbingjia.com/android/classpath:sqlMapConfig.xml"> < /property> < property name="mapperLocations" value="https://www.songbingjia.com/android/classpath*:com/huaxin/**/*Mapper.xml"> < /property> < /bean>

注意点：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。【[MyBatis]mapperLocations属性通配符的使用】 **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

缺少classpath后面的*会报以下的错误：

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org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for framework.system.dao.UserDao.getNextUserId_mysql
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for framework.system.dao.UserDao.getNextUserId_MySQL
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)
at com.sun.proxy.$Proxy18.selectOne(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163)
at com.huaxin.framework.core.dao.impl.BaseDaoImpl.selectOne(BaseDaoImpl.java:298)
at com.huaxin.framework.system.dao.impl.UserDaoImpl.getNextUserId(UserDaoImpl.java:41)

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database.Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for framework.system.dao.UserDao.getNextUserId_MySQL### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for framework.system.dao.UserDao.getNextUserId_MySQLat org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)at com.sun.proxy.$Proxy18.selectOne(Unknown Source)at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:163)at com.huaxin.framework.core.dao.impl.BaseDaoImpl.selectOne(BaseDaoImpl.java:298)at com.huaxin.framework.system.dao.impl.UserDaoImpl.getNextUserId(UserDaoImpl.java:41)