mybatis中crud操作范例

 <?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">

 <!--提供基本版，依据业务情况，酌情添加-->
 <!--author XiJun.Gong-->

 <mapper namespace="com.qunar.qexam2.course.dao.CourseDao">

     <insert id="insertCourse" parameterType="com.qunar.qexam2.course.model.CourseDomain"
             useGeneratedKeys="true" keyProperty="id">
         INSERT INTO
             course
             (
                 classification_id,
                 course_name,
                 create_time,
                 create_user,
                 update_time,
                 update_user,
                 is_delete
             )
         VALUES
             (
                 #{classificationId},
                 #{name},
                 #{createTime},
                 #{creatorTalkId},
                 #{modifyTime},
                 #{menderTalkId},
                 #{isDelete}
             )
     </insert>
     <!--批量插入数据-->
     <insert id="insertCourseBatch" parameterType="com.qunar.qexam2.course.model.CourseDomain">
         INSERT INTO
         course
         (
         classification_id ,
         course_name ,
         create_time ,
         create_user,
         update_time,
         update_user,
         is_delete
         )
         VALUES
         <foreach collection="list" item="item" index="index" separator=",">
             (
             #{item.classificationId},
             #{item.name} ,
             #{item.createTime} ,
             #{item.creatorTalkId},
             #{item.modifyTime},
             #{item.menderTalkId},
             #{item.isDelete}
             )
         </foreach>

     </insert>

     <!--物理删除-->
     <delete id="deleteCourse">

         DELETE course1 , question1
         FROM course course1
         JOIN question question1
         ON course1.id = question1.course_id
         AND question1.use_count = 0

         WHERE
         course1.id = #{CourseId};

     </delete>

     <update id="updateCourse" parameterType="com.qunar.qexam2.course.model.CourseDomain">

         UPDATE course
         <set>

             <if test="classificationId != null and classificationId !='' ">
                 course.classification_id = #{classificationId} ,
             </if>

             <if test=" name != null and name != '' ">
                 course.course_name = #{name} ,
             </if>

             <if test="createTime != null and createTime !='' ">
                 course.create_time = #{createTime} ,
             </if>

             <if test="creatorTalkId != null and creatorTalkId!='' ">
                 course.create_user = #{creatorTalkId} ,
             </if>

             <if test="modifyTime != null and modifyTime != '' ">
                 course.update_time = #{modifyTime} ,
             </if>

             <if test="menderTalkId != null and menderTalkId !='' ">
                 course.update_user = #{menderTalkId} ,
             </if>

             <if test="isDelete != null and isDelete != '' ">
                 course.is_delete = #{isDelete}
             </if>

         </set>
         WHERE course.id =#{id}

     </update>

     <!--逻辑删除-->
     <update id="updateCourseStatus">
         UPDATE course AS course1
          JOIN question AS  question1
         ON course1.id = question1.course_id
         AND question1.use_count = 0
         SET
         course1.is_delete = 1,
         question1.is_delete = 1
         WHERE
         course1.id = #{CourseId}

     </update>

     <!--分类逻辑删除-->
     <!--逻辑删除-->
     <update id="updateBatchCourseStatus">

         UPDATE course  As course1
             JOIN question As question1
         ON
         course1.id = question1.course_id
         AND question1.use_count = 0
         SET course1.is_delete = 1,
         question1.is_delete = 1
         WHERE
         course.classification_id = #{classificationId}
     </update>

     <!--逻辑添加-->
     <update id="updateCourseOnline">
         UPDATE course
         SET course.is_delete = 0
         WHERE
             course.id = #{CourseId}
     </update>

     <select id="selectCourses" resultType="com.qunar.qexam2.course.model.CourseDomain">

         SELECT
         course.id as id ,
         course.classification_id as classificationId ,
         course.course_name as name ,
         course.create_time as createTime ,
         course.create_user as creatorTalkId ,
         course.update_time as modifyTime ,
         course.update_user as menderTalkId ,
         course.is_delete as isDelete

         FROM course

         <where>

             <if test="classificationId != null and classificationId != '' ">
                 AND
                 course.classification_id = #{classificationId}
             </if>
             <if test="isDelete != null and isDelete != '' ">
                 AND
                 course.is_delete = #{isDelete}
             </if>

         </where>
         order by course.create_time desc
     </select>

     <select id="selectCourseVoAll" resultType="com.qunar.qexam2.course.vo.CourseVo">
         SELECT
             course.id          AS id,
             course.course_name AS name
         FROM course
         WHERE
             course.is_delete = 0
         ORDER BY course.create_time DESC
     </select>

     <select id="CountCourses" resultType="com.qunar.qexam2.course.model.CourseDomain">
         SELECT COUNT(*)
         FROM course
         <where>
             <if test="classificationId != null  and classificationId != '' ">
                 AND
                 course.classification_id = #{classificationId}
             </if>
             AND
             course.is_delete = 0
         </where>
     </select>

     <!--统计未进行逻辑删除的课程-->
     <select id="CountCoursesByCourseId" resultType="java.lang.Integer">
         SELECT count(*)
         FROM course
         WHERE course.is_delete = 0
     </select>

     <!--统计多个分类下的课程数目-->
     <select id="CountCoursesByCategoryId" resultType="Integer">
         SELECT COUNT(*)
         FROM course
         WHERE
         course.is_delete = 0
         AND course.classification_id IN
         <foreach item="classificationId" index="index" collection="classificationIdList"
                  open="(" separator="," close=")">
             #{classificationId}
         </foreach>
     </select>

     <select id="selectCourseByName" resultType="com.qunar.qexam2.course.model.CourseDomain">

         SELECT
         course.id as id ,
         course.classification_id as classificationId ,
         course.course_name as name ,
         course.create_time as createTime ,
         course.create_user as creatorTalkId ,
         course.update_time as modifyTime ,
         course.update_user as menderTalkId ,
         course.is_delete as isDelete

         FROM course
         <where>
             <if test="CourseName != null and CourseName != '' ">
                 AND
                 course.course_name like #{CourseName}
             </if>
             <if test="isDelete != null  and isDelete != '' ">
                 AND
                 course.is_delete = #{isDelete}
             </if>
         </where>

         order by course.create_time desc
     </select>

     <select id="selectCourse" resultType="com.qunar.qexam2.course.model.CourseDomain">

         SELECT
         course.id as id ,
         course.classification_id as classificationId ,
         course.course_name as name ,
         course.create_time as createTime ,
         course.create_user as creatorTalkId ,
         course.update_time as modifyTime ,
         course.update_user as menderTalkId ,
         course.is_delete as isDelete

         FROM course
         <where>
             <if test="CourseId != null and CourseId != '' ">
                 AND
                 course.id = #{CourseId}
             </if>
             <if test="isDelete != null and isDelete !='' ">
                 AND
                 course.is_delete = #{isDelete}
             </if>
         </where>
         order by course.create_time desc
     </select>

     <select id="selectCourseWithoutLimit"
             resultType="com.qunar.qexam2.course.model.CourseDomain">

         SELECT
             course.id                AS id,
             course.classification_id AS classificationId,
             course.course_name       AS name,
             course.create_time       AS createTime,
             course.create_user       AS creatorTalkId,
             course.update_time       AS modifyTime,
             course.update_user       AS menderTalkId,
             course.is_delete         AS isDelete
         FROM course

         WHERE course.is_delete = 0
         ORDER BY course.create_time DESC
     </select>

     <select id="selectCourseByAuthor" resultType="com.qunar.qexam2.course.model.CourseDomain">

         SELECT
         course.id as id ,
         course.classification_id as classificationId ,
         course.course_name as name ,
         course.create_time as createTime ,
         course.create_user as creatorTalkId ,
         course.update_time as modifyTime ,
         course.update_user as menderTalkId ,
         course.is_delete as isDelete

         FROM course
         <where>
             <if test="creatorTalkId != null  and creatorTalkId != '' ">
                 AND
                 course.create_user = #{creatorTalkId}
             </if>

             <if test="isDelete != null and isDelete != '' ">
                 AND
                 course.is_delete = #{isDelete}
             </if>
         </where>
         order by course.create_time desc
     </select>

     <select id="selectClassificationName" resultType="java.lang.String">
         SELECT classification.tag_name
         FROM course
         LEFT JOIN classification
         ON course.classification_id = classification.id
         <where>
             <if test="courseId != null and courseId !='' ">
                 AND
                 course.id = courseId
             </if>
         </where>
     </select>

     <select id="queryCourseVoByCategoryId" resultType="com.qunar.qexam2.course.vo.CourseVo">
         SELECT
         course.id AS id ,
         course.course_name AS name,
         FROM course
         <where>
             <if test="classificationId != null and classificationId != '' ">
                 AND
                 course.classification_id = #{classificationId}
             </if>
         </where>
     </select>

     <!--依照分类来返回课程列表信息-->
     <select id="queryCourseInfVoByCategoryId" resultType="com.qunar.qexam2.course.vo.CourseInfoVo">

         SELECT
         course.id AS id ,
         course.course_name AS courseName,
         course.create_user AS createUser,
         course.create_time As createTime
         FROM course

         <where>
             <if test="classificationId != null and classificationId != '' ">
                 AND
                 course.classification_id = #{classificationId}
             </if>
         </where>

     </select>

     <!--依照分类来返回课程列表信息-->
     <select id="queryCourseInfVoByCategoryIdList" resultType="com.qunar.qexam2.course.vo.CourseInfoVo">
         SELECT
         course.id AS id ,
         course.course_name AS courseName,
         course.create_user AS createUser,
         course.create_time As createTime
         FROM course
         WHERE course.classification_id IN
         <foreach item="classificationId" index="index" collection="classificationIdList"
                  open="(" separator="," close=")">
             #{classificationId}
         </foreach>
     </select>

     <!--
         &lt;!&ndash;给予课程Id查询课程所属的一二级部门部门&ndash;&gt;
         <select id="queryCourseAffiliation" resultType="com.qunar.qexam2.course.vo.CourseAffiliation">

           SELECT
             course1.course_name AS courseName ,
             category1.tag_name  As firstDepart ,
             category2.tag_name  AS secondDepart

           FROM
               course course1

            JOIN classification category2 ON
              category2.id  =  course1.classification_id

            JOIN  classification category1 ON
             category1.id = category2.parent_id

           WHERE course1.id = #{courseId}

         </select>
     -->

     <!--依照分类来返回课程列表信息-->
     <select id="queryCategoryIdByCourseId" resultType="java.lang.Integer">
         SELECT
         course.classification_id AS classificationId
         FROM course
         WHERE course.id IN
         <foreach item="courseId" index="index" collection="courseIdList"
                  open="(" separator="," close=")">
             #{courseId}
         </foreach>
     </select>

     <!--依照分类Id来返回课程Id列表信息-->
     <select id="queryCourseIdByCategoryId" resultType="java.lang.Integer">
         SELECT
         course.id
         FROM course
         WHERE course.classification_id IN
         <foreach item="classificationId" index="index" collection="categoryIdList"
                  open="(" separator="," close=")">
             #{classificationId}
         </foreach>
     </select>

 </mapper>