springboot-learning-example/springboot-mybatis-redis/src/main/resources/mapper/CityMapper.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="org.spring.springboot.dao.CityDao">
	<resultMap id="BaseResultMap" type="org.spring.springboot.domain.City">
		<result column="id" property="id" />
		<result column="province_id" property="provinceId" />
		<result column="city_name" property="cityName" />
		<result column="description" property="description" />
	</resultMap>

	<sql id="Base_Column_List">
		id, province_id, city_name, description
	</sql>

	<select id="findById" resultMap="BaseResultMap" parameterType="java.lang.Long">
		select
		<include refid="Base_Column_List" />
		from city
		where id = #{id}
	</select>

	<select id="findAllCity" resultMap="BaseResultMap" >
		select
		<include refid="Base_Column_List" />
		from city
	</select>

	<insert id="saveCity" parameterType="City" useGeneratedKeys="true" keyProperty="id">
		insert into
		city(id,province_id,city_name,description)
		values
		(#{id},#{provinceId},#{cityName},#{description})
	</insert>

	<update id="updateCity" parameterType="City">
		update
		city
		set
		<if test="provinceId!=null">
			province_id = #{provinceId},
		</if>
		<if test="cityName!=null">
			city_name = #{cityName},
		</if>
		<if test="description!=null">
			description = #{description}
		</if>
		where
		id = #{id}
	</update>

	<delete id="deleteCity" parameterType="java.lang.Long">
		delete from
		city
		where
		id = #{id}
	</delete>

</mapper>