mybatis_5_创建mapper.xml

创建mapper.xml

示例IndicatorMapper.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="tk.mybatis.simple.mapper.IndicatorMapper">
    <select id="indicatorName" resultType="tk.mybatis.simple.mapper.Indicator">
        select indicator_name as indicatorName from test_table where indicator_code = #{indicatorCode}
    </select>
</mapper>

　　分析：

namespace为mapper.xml文件的路径

resultType为返回类型，当前示例中返回的类型为JavaBean

文件结构：