MajorMapper.xml
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<?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.sincere.student.mapper.MajorMapper">
<resultMap id="MajorMap" type="com.sincere.student.model.Major">
<id column="id" property="id"/>
<result column="major" property="major"/>
<result column="major_code" property="majorCode"/>
<result column="p_id" property="pid"/>
<result column="create_time" property="createTime"/>
</resultMap>
<select id="getById" parameterType="java.lang.Integer" resultMap="MajorMap">
select * from university_major
where id =#{id}
</select>
<select id="getList" parameterType="com.sincere.student.model.Major" resultMap="MajorMap">
select * from university_major
<where>
<if test="pid != 0">
and p_id = #{pid}
</if>
<if test="major != null and major != ''">
and major like #{major}
</if>
</where>
</select>
<select id="getListCount" parameterType="com.sincere.student.model.Major" resultType="java.lang.Integer">
select count(0) from university_major
<where>
<if test="pid != 0">
and p_id = #{pid}
</if>
<if test="major != null and major != ''">
and major like #{major}
</if>
</where>
</select>
<insert id="create" parameterType="com.sincere.student.model.Major">
insert into university_major (major,major_code,p_id,create_time)
values (#{major},#{majorCode},#{pid},GETDATE())
</insert>
<delete id="delete" parameterType="java.lang.Integer">
delete university_major where id = #{id}
</delete>
<delete id="deleteByPid" parameterType="java.lang.Integer">
delete university_major where p_id = #{id}
</delete>
<update id="update" parameterType="com.sincere.student.model.Major">
update university_major
<trim prefix="set" suffixOverrides=",">
<if test="major!=null">
major=#{major},
</if>
<if test="majorCode!=null">
major_code=#{majorCode},
</if>
<if test="pid!=0">
p_id=#{pid},
</if>
</trim>
where id = #{id}
</update>
<resultMap id="MajorMap2" type="com.sincere.student.model.Major">
<result column="f_id" property="id"/>
<result column="f_major" property="major"/>
<collection property="children" ofType="com.sincere.student.model.Major">
<result column="s_id" property="id"/>
<result column="s_major" property="major"/>
</collection>
</resultMap>
<select id="selectMajor" resultMap="MajorMap2">
select f.id as f_id , f.major as f_major , s.id as s_id , s.major as s_major from
university_major s
join university_major f on f.id = s.p_id
</select>
</mapper>