settings
- settings包含很多重要的设置项
- setting:用来设置每一个设置项
- name:设置项名
- value:设置项取值
mapUnderscoreToCamelCase
- 开启驼峰命名法
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
Employee:
package com.atguigu.mybatis.bean;
public class Employee {
private Integer id;
private String lastName;
private String email;
private String gender;
}
EmployeeMapper.xml:
<?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="com.atguigu.mybatis.dao.EmployeeMapper">
<select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee">
select id,last_name ,email,gender from tb1_employee where id = #{id}
</select>
</mapper>
bean的lastName可以与数据库的last_name映射上了!
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