{"id":1459,"date":"2025-03-01T19:11:51","date_gmt":"2025-03-01T11:11:51","guid":{"rendered":"https:\/\/www.tqazy.com\/?p=1459"},"modified":"2025-03-05T16:20:07","modified_gmt":"2025-03-05T08:20:07","slug":"mybatisplus%ef%bc%88%e4%b8%80%ef%bc%89%e5%bf%ab%e9%80%9f%e5%85%a5%e9%97%a8","status":"publish","type":"post","link":"https:\/\/www.tqazy.com\/?p=1459","title":{"rendered":"MybatisPlus\uff08\u4e00\uff09\u5feb\u901f\u5165\u95e8"},"content":{"rendered":"
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\u89c6\u9891\u8bfe\u7a0b\u5730\u5740\uff1a\u9ed1\u9a6c\u5546\u57ce\u9879\u76ee<\/a><\/p>\n

\u4e0b\u4e00\u8282\uff1aMybatisPlus\uff08\u4e8c\uff09\u6838\u5fc3\u529f\u80fd01 \u2014 \u6761\u4ef6\u6784\u9020\u5668<\/a>
\n\u672c\u8282\u5b66\u4e60MybatisPlus\uff08MP\uff09\u7684\u57fa\u672c\u4f7f\u7528\u6d41\u7a0b\uff1a<\/p>\n

    \n
  1. \u5f15\u5165\u8d77\u6b65\u4f9d\u8d56<\/li>\n
  2. \u81ea\u5b9a\u4e49Mapper\u7ee7\u627fBaseMapper<\/li>\n
  3. \u5728\u5b9e\u4f53\u7c7b\u4e0a\u6dfb\u52a0\u6ce8\u89e3\u58f0\u660e \u8868\u4fe1\u606f<\/li>\n
  4. \u5728application.yml\u4e2d\u6839\u636e\u9700\u8981\u6dfb\u52a0\u914d\u7f6e<\/li>\n<\/ol>\n<\/blockquote>\n

    MybatisPlus\u5b98\u7f51\uff1ahttps:\/\/baomidou.com<\/a><\/a><\/p>\n

    \u4e00\u3001\u4f7f\u7528MybatisPlus\u6d41\u7a0b<\/h1>\n

    1.1 \u5f15\u5165\u8d77\u6b65\u4f9d\u8d56<\/h2>\n

    MyBatisPlus\u5b98\u65b9\u63d0\u4f9b\u4e86starter\uff0c\u5176\u4e2d\u96c6\u6210\u4e86Mybatis\u548cMybatisPlus\u7684\u6240\u6709\u529f\u80fd\uff0c\u5e76\u4e14\u5b9e\u73b0\u4e86\u81ea\u52a8\u88c5\u914d\u6548\u679c\u3002<\/p>\n

    \u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u7528MybatisPlus\u7684starter\u4ee3\u66ffMybatis\u7684starter\uff1a<\/p>\n

    <!-- MybatisPlus -->\n<dependency>\n  <groupId>com.baomidou<\/groupId>\n  <artifactId>mybatis-plus-boot-starter<\/artifactId>\n  <version>3.5.3.1<\/version>\n<\/dependency><\/code><\/pre>\n
    <\/div>\n
    1.2 \u5b9a\u4e49Mapper<\/h2>\n
    \u81ea\u5b9a\u4e49\u7684Mapper\u7ee7\u627fMybatisPlus\u63d0\u4f9b\u7684BaseMapper\u63a5\u53e3\uff1a<\/p>\n
    public interface UserMapper extends BaseMapper<User> {\n\n}<\/code><\/pre>\n
    BaseMapper\u63a5\u53e3\u65b0\u589e\u4e86\u5f88\u591aCRUD\u7684\u63a5\u53e3\uff1a
    \n
    \"\"<\/div><\/p>\n
    <\/div>\n
    1.3 \u66ff\u6362Mybatis\u6848\u4f8b<\/h2>\n
    1.3.1 \u4f7f\u7528Mybatis\u7684\u5199\u6cd5<\/h3>\n
    1\u3001UserMapper.java<\/strong><\/p>\n
    package com.itheima.mp.mapper;\n\nimport com.baomidou.mybatisplus.core.mapper.BaseMapper;\nimport com.itheima.mp.domain.po.User;\nimport org.apache.ibatis.annotations.Param;\nimport java.util.List;\n\npublic interface UserMapper extends BaseMapper<User> {\n\n    void saveUser(User user);\n\n    void deleteUser(Long id);\n\n    void updateUser(User user);\n\n    User queryUserById(@Param("id") Long id);\n\n    List<User> queryUserByIds(@Param("ids") List<Long> ids);\n}\n<\/code><\/pre>\n
    <\/div>\n
    2\u3001UserMapper.xml<\/strong><\/p>\n
    <?xml version="1.0" encoding="UTF-8"?>\n<!DOCTYPE mapper PUBLIC "-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN" "http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd">\n<mapper namespace="com.itheima.mp.mapper.UserMapper">\n    <insert id="saveUser" parameterType="com.itheima.mp.domain.po.User">\n        INSERT INTO `user` (`id`, `username`, `password`, `phone`, `info`, `balance`)\n        VALUES\n        (#{id}, #{username}, #{password}, #{phone}, #{info}, #{balance});\n    <\/insert>\n    <update id="updateUser" parameterType="com.itheima.mp.domain.po.User">\n        UPDATE `user`\n        <set>\n            <if test="username != null">\n                `username`=#{username}\n            <\/if>\n            <if test="password != null">\n                `password`=#{password}\n            <\/if>\n            <if test="phone != null">\n                `phone`=#{phone}\n            <\/if>\n            <if test="info != null">\n                `info`=#{info}\n            <\/if>\n            <if test="status != null">\n                `status`=#{status}\n            <\/if>\n            <if test="balance != null">\n                `balance`=#{balance}\n            <\/if>\n        <\/set>\n        WHERE `id`=#{id};\n    <\/update>\n    <delete id="deleteUser" parameterType="com.itheima.mp.domain.po.User">\n        DELETE FROM user WHERE id = #{id}\n    <\/delete>\n\n    <select id="queryUserById" resultType="com.itheima.mp.domain.po.User">\n        SELECT *\n        FROM user\n        WHERE id = #{id}\n    <\/select>\n\n    <select id="queryUserByIds" resultType="com.itheima.mp.domain.po.User">\n        SELECT *\n        FROM user\n        <if test="ids != null">\n            WHERE id IN\n            <foreach collection="ids" open="(" close=")" item="id" separator=",">\n                #{id}\n            <\/foreach>\n        <\/if>\n        LIMIT 10\n    <\/select>\n\n<\/mapper><\/code><\/pre>\n
    <\/div>\n
    3\u3001\u6d4b\u8bd5<\/strong><\/p>\n
        @Test\n    void testQueryByIds() {\n        List<User> users = userMapper.queryUserByIds(List.of(1L, 2L, 3L, 4L));\n        users.forEach(System.out::println);\n    }<\/code><\/pre>\n
    <\/div>\n
    \u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
    \"\"<\/div><\/p>\n
    <\/div>\n
    1.3.2 \u4f7f\u7528MybatisPlus\u7684\u5199\u6cd5<\/h3>\n
    1\u3001UserMapper.java<\/strong><\/p>\n
    package com.itheima.mp.mapper;\n\nimport com.baomidou.mybatisplus.core.mapper.BaseMapper;\nimport com.itheima.mp.domain.po.User;\n\npublic interface UserMapper extends BaseMapper<User> {\n\n}<\/code><\/pre>\n
    <\/div>\n
    2\u3001UserMapper.xml<\/strong><\/p>\n
    <?xml version="1.0" encoding="UTF-8"?>\n<!DOCTYPE mapper PUBLIC "-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN" "http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd">\n<mapper namespace="com.itheima.mp.mapper.UserMapper">\n\n<\/mapper><\/code><\/pre>\n
    <\/div>\n
    3\u3001\u6d4b\u8bd5<\/strong><\/p>\n
        @Test\n    void testQueryByIds() {\n        List<User> users = userMapper.selectBatchIds(List.of(1L, 2L, 3L, 4L));\n        users.forEach(System.out::println);\n    }<\/code><\/pre>\n
    \u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
    \"\"<\/div><\/p>\n
    \u8fd0\u884c\u7ed3\u679c\u76f8\u540c\u3002<\/p>\n
    <\/div>\n
    \u4e8c\u3001\u5e38\u7528\u6ce8\u89e3<\/h1>\n
    2.1 MyBatisPlus\u5b9e\u73b0CRUD\u7684\u539f\u7406<\/h2>\n
    MyBatisPlus\u901a\u8fc7\u626b\u63cf\u5b9e\u4f53\u7c7b\uff0c\u5e76\u57fa\u4e8e\u53cd\u5c04\u83b7\u53d6\u5b9e\u4f53\u7c7b\u4fe1\u606f\u4f5c\u4e3a\u6570\u636e\u5e93\u8868\u4fe1\u606f\u3002<\/p>\n
    \u547d\u540d\u539f\u5219\uff08\u7ea6\u5b9a\u5927\u4e8e\u914d\u7f6e\uff09\uff1a<\/p>\n