mybatis系列教程：单表数据操作

mybatis系列教程：单表数据操作

以文章列表为例。

文章表结构设计

id ：编号
article_title :标题
article_content :内容
article_type ：文章类型
................：略了几个字段
代码

1:Controller

1.1 查询 List<DrArticles> list = drArticlesService.selectDrArticlesList(drArticles);

2：Bean

@Data
public class DrArticles extends BaseEntity
{
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String articleTitle;
    private String articleType;
    private String articleContent;
    private String createNickname;
}

3:Service

4：Mapper

5：mybatis xml文件

<?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.system.mapper.DrArticlesMapper">
    
    <resultMap type="DrArticles" id="DrArticlesResult">
        <result property="id"    column="id"    />
        <result property="articleTitle"    column="article_title"    />
        <result property="articleType"    column="article_type"    />
        <result property="articleContent"    column="article_content"    />
        <result property="createBy"    column="create_by"    />
        <result property="createTime"    column="create_time"    />
        <result property="updateBy"    column="update_by"    />
        <result property="updateTime"    column="update_time"    />
        <result property="remark"    column="remark"    />
        <result property="createNickname"    column="create_nickname"    />
    </resultMap>

    <sql id="selectDrArticlesVo">
        select id, article_title, article_type, article_content, create_by, create_time, update_by, update_time, remark, create_nickname from dr_articles
    </sql>

    <select id="selectDrArticlesList" parameterType="DrArticles" resultMap="DrArticlesResult">
        <include refid="selectDrArticlesVo"/>
        <where>  
            <if test="articleTitle != null  and articleTitle != ''"> and article_title = #{articleTitle}</if>
            <if test="articleType != null  and articleType != ''"> and article_type = #{articleType}</if>
            <if test="articleContent != null  and articleContent != ''"> and article_content = #{articleContent}</if>
            <if test="createNickname != null  and createNickname != ''"> and create_nickname like concat('%', #{createNickname}, '%')</if>
        </where>
    </select>
    <select id="selectDrArticlesById" parameterType="Integer" resultMap="DrArticlesResult">
        <include refid="selectDrArticlesVo"/>
        where id = #{id}
    </select>  
    <insert id="insertDrArticles" parameterType="DrArticles" useGeneratedKeys="true" keyProperty="id">
        insert into dr_articles
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="articleTitle != null">article_title,</if>
            <if test="articleType != null">article_type,</if>
            <if test="articleContent != null">article_content,</if>
            <if test="createBy != null">create_by,</if>
            <if test="createTime != null">create_time,</if>
            <if test="updateBy != null">update_by,</if>
            <if test="updateTime != null">update_time,</if>
            <if test="remark != null">remark,</if>
            <if test="createNickname != null">create_nickname,</if>
         </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
            <if test="articleTitle != null">#{articleTitle},</if>
            <if test="articleType != null">#{articleType},</if>
            <if test="articleContent != null">#{articleContent},</if>
            <if test="createBy != null">#{createBy},</if>
            <if test="createTime != null">#{createTime},</if>
            <if test="updateBy != null">#{updateBy},</if>
            <if test="updateTime != null">#{updateTime},</if>
            <if test="remark != null">#{remark},</if>
            <if test="createNickname != null">#{createNickname},</if>
         </trim>
    </insert>
    <update id="updateDrArticles" parameterType="DrArticles">
        update dr_articles
        <trim prefix="SET" suffixOverrides=",">
            <if test="articleTitle != null">article_title = #{articleTitle},</if>
            <if test="articleType != null">article_type = #{articleType},</if>
            <if test="articleContent != null">article_content = #{articleContent},</if>
            <if test="createBy != null">create_by = #{createBy},</if>
            <if test="createTime != null">create_time = #{createTime},</if>
            <if test="updateBy != null">update_by = #{updateBy},</if>
            <if test="updateTime != null">update_time = #{updateTime},</if>
            <if test="remark != null">remark = #{remark},</if>
            <if test="createNickname != null">create_nickname = #{createNickname},</if>
        </trim>
        where id = #{id}
    </update>

    <delete id="deleteDrArticlesById" parameterType="Integer">
        delete from dr_articles where id = #{id}
    </delete>

    <delete id="deleteDrArticlesByIds" parameterType="String">
        delete from dr_articles where id in 
        <foreach item="id" collection="array" open="(" separator="," close=")">
            #{id}
        </foreach>
    </delete>

</mapper>