mybatis开启数据库字段自动映射为java驼峰命名规则

<?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>