一、AreaDao.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.imooc.o2o.dao.AreaDao">
    <select id="queryArea" resultType="com.imooc.o2o.entity.Area">
        SELECT area_id, area_name,
        priority, create_time, last_edit_time
        FROM tb_area
        ORDER BY priority
        DESC
    </select>
    <insert id="insertArea" useGeneratedKeys="true" keyProperty="areaId"
        keyColumn="area_id">
        INSERT INTO
        tb_area(area_name,area_desc,priority,
        create_time,last_edit_time)
        VALUES
        (#{areaName},#{areaDesc},#{priority},
        #{createTime},#{lastEditTime})
    </insert>
    <update id="updateArea" parameterType="com.imooc.o2o.entity.Area">
        update tb_area
        <set>
            <if test="areaName != null">area_name=#{areaName},</if>
            <if test="areaDesc != null">area_desc=#{areaDesc},</if>
            <if test="priority != null">priority=#{priority},</if>
            <if test="lastEditTime != null">last_edit_time=#{lastEditTime}</if>
        </set>
        where area_id=#{areaId}
    </update>
    <delete id="deleteArea">
        DELETE FROM
        tb_area
        WHERE
        area_id =
        #{areaId}
    </delete>
    <delete id="batchDeleteArea" parameterType="long">
        DELETE FROM
        tb_area
        WHERE area_id IN
        <foreach collection="list" item="areaId" open="(" separator=","
            close=")">
            #{areaId}
        </foreach>
    </delete>
</mapper>