mybatis中mapUnderscoreToCamelCase的使用

mybatis-config.xml

 

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE configuration  
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"  
"http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>  
    <settings>  
        <setting name="mapUnderscoreToCamelCase" value="true" />  
    </settings>  
</configuration>  

开始以为配置了这个文件就可以了，搞了半天还是没生效，不能转驼峰，然后查了下configuration初始化时它的值也为true，说明初始化是正确，后来才知道原因出在mapper文件

 

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper  
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"  
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">  
<mapper namespace="menu.mysql">  
    <select id="selectMenu" resultType="org.me.menu.Menu">  
        select MENU_ID, MENU_NAME, PARENT_ID, URL, TITLE, LEAF, ORDER_SEQ  
          from mysql.MENU  
          order by ORDER_SEQ  
    </select>  
</mapper> 

 开始我配置成resultType="hashMap"是可以返回结果，但是结果是没有自动转成驼峰，要真正存在一个与它对应的驼峰Bean与它对应才生效，resultType="org.me.menu.Menu"