<?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>