空值处理

xufenglei

2018-07-20 d8680e96da9c51f22fae430fc493f110cb374e5b

 src/main/resources/mapper/DemoMapper.xml

@@ -1,4 +1,7 @@
<?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.moral.mapper.DemoMapper" >
<mapper namespace="com.moral.mapper.DemoMapper">
   <select id="getDatas" resultType="map">
      SELECT * FROM hangzhou_aqi ORDER BY time DESC LIMIT 7
   </select>
</mapper>