MyBatis中XML文件的模板

MyBatis中XML文件的模板

xml 复制代码
<?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="generator.mapper.UsersMapper">

    <resultMap id="BaseResultMap" type="generator.domain.Users">
            <id property="id" column="id" jdbcType="INTEGER"/>
            <result property="username" column="username" jdbcType="VARCHAR"/>
            <result property="password" column="password" jdbcType="VARCHAR"/>
            <result property="email" column="email" jdbcType="VARCHAR"/>
    </resultMap>

    <sql id="Base_Column_List">
        id,username,password,
        email
    </sql>

    <select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
        select
        <include refid="Base_Column_List" />
        from users
        where  id = #{id,jdbcType=INTEGER} 
    </select>

    <delete id="deleteByPrimaryKey" parameterType="java.lang.Long">
        delete from users
        where  id = #{id,jdbcType=INTEGER} 
    </delete>
    <insert id="insert" keyColumn="id" keyProperty="id" parameterType="generator.domain.Users" useGeneratedKeys="true">
        insert into users
        ( id,username,password
        ,email)
        values (#{id,jdbcType=INTEGER},#{username,jdbcType=VARCHAR},#{password,jdbcType=VARCHAR}
        ,#{email,jdbcType=VARCHAR})
    </insert>
    <insert id="insertSelective" keyColumn="id" keyProperty="id" parameterType="generator.domain.Users" useGeneratedKeys="true">
        insert into users
        <trim prefix="(" suffix=")" suffixOverrides=",">
                <if test="id != null">id,</if>
                <if test="username != null">username,</if>
                <if test="password != null">password,</if>
                <if test="email != null">email,</if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
                <if test="id != null">#{id,jdbcType=INTEGER},</if>
                <if test="username != null">#{username,jdbcType=VARCHAR},</if>
                <if test="password != null">#{password,jdbcType=VARCHAR},</if>
                <if test="email != null">#{email,jdbcType=VARCHAR},</if>
        </trim>
    </insert>
    <update id="updateByPrimaryKeySelective" parameterType="generator.domain.Users">
        update users
        <set>
                <if test="username != null">
                    username = #{username,jdbcType=VARCHAR},
                </if>
                <if test="password != null">
                    password = #{password,jdbcType=VARCHAR},
                </if>
                <if test="email != null">
                    email = #{email,jdbcType=VARCHAR},
                </if>
        </set>
        where   id = #{id,jdbcType=INTEGER} 
    </update>
    <update id="updateByPrimaryKey" parameterType="generator.domain.Users">
        update users
        set 
            username =  #{username,jdbcType=VARCHAR},
            password =  #{password,jdbcType=VARCHAR},
            email =  #{email,jdbcType=VARCHAR}
        where   id = #{id,jdbcType=INTEGER} 
    </update>
</mapper>
相关推荐
DemonAvenger44 分钟前
MySQL海量数据快速导入导出技巧:从实战到优化
数据库·mysql·性能优化
薛定谔的算法17 小时前
phoneGPT:构建专业领域的检索增强型智能问答系统
前端·数据库·后端
Databend19 小时前
Databend 亮相 RustChinaConf 2025,分享基于 Rust 构建商业化数仓平台的探索
数据库
得物技术20 小时前
破解gh-ost变更导致MySQL表膨胀之谜|得物技术
数据库·后端·mysql
Raymond运维1 天前
MariaDB源码编译安装(二)
运维·数据库·mariadb
沢田纲吉1 天前
🗄️ MySQL 表操作全面指南
数据库·后端·mysql
RestCloud2 天前
SQL Server到Hive:批处理ETL性能提升30%的实战经验
数据库·api
RestCloud2 天前
为什么说零代码 ETL 是未来趋势?
数据库·api
ClouGence2 天前
CloudCanal + Paimon + SelectDB 从 0 到 1 构建实时湖仓
数据库
DemonAvenger2 天前
NoSQL与MySQL混合架构设计:从入门到实战的最佳实践
数据库·mysql·性能优化