Mybatis-mapper中xml语法

查询（含表单筛选）

<sql id="selectPostVo">
   select post_id, post_code, post_name, post_sort, status, create_by, create_time, remark  from sys_post
</sql>
##查询全部
<select id="selectPostAll" resultMap="SysPostResult">
  <include refid="selectPostVo"/>
</select>
##筛选查询
<select id="selectPostList" parameterType="SysPost" resultMap="SysPostResult">
  <include refid="selectPostVo"/>
  <where>
        <if test="postCode != null and postCode != ''">
            AND post_code like concat('%', #{postCode}, '%')
        </if>
        <if test="status != null and status != ''">
            AND status = #{status}
        </if>
        <if test="postName != null and postName != ''">
            AND post_name like concat('%', #{postName}, '%')
        </if>
   </where>
</select>

查看详情

<select id="selectPostById" parameterType="Long" resultMap="SysPostResult">
    <include refid="selectPostVo"/>
    where post_id = #{postId}
</select>

添加

    <insert id="insertPost" parameterType="SysPost" useGeneratedKeys="true" keyProperty="postId">
        insert into sys_post(
            <if test="postId != null and postId != 0">post_id,</if>
            <if test="postCode != null and postCode != ''">post_code,</if>
            <if test="postName != null and postName != ''">post_name,</if>
            <if test="postSort != null and postSort != ''">post_sort,</if>
            <if test="status != null and status != ''">status,</if>
            <if test="remark != null and remark != ''">remark,</if>
            <if test="createBy != null and createBy != ''">create_by,</if>
            create_time
        )values(
            <if test="postId != null and postId != 0">#{postId},</if>
            <if test="postCode != null and postCode != ''">#{postCode},</if>
            <if test="postName != null and postName != ''">#{postName},</if>
            <if test="postSort != null and postSort != ''">#{postSort},</if>
            <if test="status != null and status != ''">#{status},</if>
            <if test="remark != null and remark != ''">#{remark},</if>
            <if test="createBy != null and createBy != ''">#{createBy},</if>
            sysdate()
        )
    </insert>

修改

    <update id="updatePost" parameterType="SysPost">
        update sys_post
        <set>
            <if test="postCode != null and postCode != ''">post_code = #{postCode},</if>
            <if test="postName != null and postName != ''">post_name = #{postName},</if>
            <if test="postSort != null and postSort != ''">post_sort = #{postSort},</if>
            <if test="status != null and status != ''">status = #{status},</if>
            <if test="remark != null">remark = #{remark},</if>
            <if test="updateBy != null and updateBy != ''">update_by = #{updateBy},</if>
            update_time = sysdate()
        </set>
        where post_id = #{postId}
    </update>

删除、批量删除

<delete id="deletePostById" parameterType="Long">
    delete from sys_post where post_id = #{postId}
</delete>

<delete id="deletePostByIds" parameterType="Long">
    delete from sys_post where post_id in
    <foreach collection="array" item="postId" open="(" separator="," close=")">
        #{postId}
    </foreach> 
</delete>