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的关联查询，数据库表除了前面小节中已经定义好的用户表...","2026-09-12T08:29:57.518395Z",[87],[],{"permalink":412,"excerpt":407,"lastModifyTime":413,"phase":116},"\u002Farchives\u002Fmybaitsplus-join-query","2026-09-13T05:25:32.424638Z",[415],{"metadata":416,"spec":417,"status":418,"postCount":96},{"name":87,"creationTimestamp":88},{"displayName":90,"slug":87,"cover":91,"description":92,"priority":27,"hideFromList":93,"preventParentPostCascadeQuery":93},{"permalink":95,"postCount":96,"visiblePostCount":96},{"metadata":420,"spec":423,"status":432,"categories":436},{"name":421,"creationTimestamp":422},"post-mybaitsplus-enum-value-745dbc08","2026-09-12T08:29:56.730649Z",{"title":424,"slug":425,"cover":426,"excerpt":427,"publishTime":429,"categories":430,"tags":431,"priority":27,"pinned":93,"deleted":93,"visible":111,"allowComment":112},"Mybatis Plus 通用枚举（图文讲解）","mybaitsplus-enum-value","\u002Fupload\u002F167359425246371-MHdo.jpg",{"raw":428,"autoGenerate":93},"\r\n大家好，本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 gender，在插入数据时，我们的示例代码大致如下...","2026-09-12T08:29:56.787230Z",[87],[],{"permalink":433,"excerpt":434,"lastModifyTime":435,"phase":116},"\u002Farchives\u002Fmybaitsplus-enum-value","本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 gender，在插入数据时，我们的示例代码大致如下...","2026-09-13T05:25:33.487169Z",[437],{"metadata":438,"spec":439,"status":440,"postCount":96},{"name":87,"creationTimestamp":88},{"displayName":90,"slug":87,"cover":91,"description":92,"priority":27,"hideFromList":93,"preventParentPostCascadeQuery":93},{"permalink":95,"postCount":96,"visiblePostCount":96},{"metadata":442,"spec":445,"status":454,"categories":458},{"name":443,"creationTimestamp":444},"post-mybaitsplus-common-annotation-80f197dc","2026-09-12T08:29:56.056296Z",{"title":446,"slug":447,"cover":448,"excerpt":449,"publishTime":451,"categories":452,"tags":453,"priority":27,"pinned":93,"deleted":93,"visible":111,"allowComment":112},"Mybatis Plus 常用注解（超详细）","mybaitsplus-common-annotation","\u002Fupload\u002F167334634342163-ZyfL.jpg",{"raw":450,"autoGenerate":93},"大家好，本文主要带大家来看下 Mybatis Plus 框架中，使用频率非常高的几个注解及其属性值，因为编写此本教程目的是为了大家快速入门并使用 Mybatis Plus，关于注解更高级的用法请参考官网...","2026-09-12T08:29:56.114067Z",[87],[],{"permalink":455,"excerpt":456,"lastModifyTime":457,"phase":116},"\u002Farchives\u002Fmybaitsplus-common-annotation","本文主要带大家来看下 Mybatis Plus 框架中，使用频率非常高的几个注解及其属性值，因为编写此本教程目的是为了大家快速入门并使用 Mybatis Plus，关于注解更高级的用法请参考官网...","2026-09-13T05:25:33.983128Z",[459],{"metadata":460,"spec":461,"status":462,"postCount":96},{"name":87,"creationTimestamp":88},{"displayName":90,"slug":87,"cover":91,"description":92,"priority":27,"hideFromList":93,"preventParentPostCascadeQuery":93},{"permalink":95,"postCount":96,"visiblePostCount":96},{"metadata":464,"spec":467,"status":476,"categories":479},{"name":465,"creationTimestamp":466},"post-mybaitsplus-code-generator-c984d27c","2026-09-12T08:29:55.452199Z",{"title":468,"slug":469,"cover":470,"excerpt":471,"publishTime":473,"categories":474,"tags":475,"priority":27,"pinned":93,"deleted":93,"visible":111,"allowComment":112},"Mybatis Plus 代码生成器（图文讲解）","mybaitsplus-code-generator","\u002Fupload\u002F167387297654896-aKtE.jpg",{"raw":472,"autoGenerate":93},"本小节中，我们将学习如何使用 Mybatis Plus 的代码生成器。可能有效小伙伴会疑惑，这玩意是干嘛使的？通常在实际项目开发中，如果开发一个功能，我们会先进行表设计，技术方案的确定，技术经理评估 OK 以后，才会进行项目开发，而不是一上来就写代码，跟无头苍蝇一样...","2026-09-12T08:29:55.508709Z",[87],[],{"permalink":477,"excerpt":472,"lastModifyTime":478,"phase":116},"\u002Farchives\u002Fmybaitsplus-code-generator","2026-09-13T05:25:35.131214Z",[480],{"metadata":481,"spec":482,"status":483,"postCount":96},{"name":87,"creationTimestamp":88},{"displayName":90,"slug":87,"cover":91,"description":92,"priority":27,"hideFromList":93,"preventParentPostCascadeQuery":93},{"permalink":95,"postCount":96,"visiblePostCount":96},{"metadata":485,"spec":486,"status":490,"categories":491,"content":496},{"name":421,"creationTimestamp":422},{"title":424,"slug":425,"cover":426,"excerpt":487,"publishTime":429,"categories":488,"tags":489,"priority":27,"pinned":93,"deleted":93,"visible":111,"allowComment":112},{"raw":428,"autoGenerate":93},[87],[],{"permalink":433,"excerpt":434,"lastModifyTime":435,"phase":116},[492],{"metadata":493,"spec":494,"status":495,"postCount":96},{"name":87,"creationTimestamp":88},{"displayName":90,"slug":87,"cover":91,"description":92,"priority":27,"hideFromList":93,"preventParentPostCascadeQuery":93},{"permalink":95,"postCount":96,"visiblePostCount":96},{"content":497,"raw":498},"\u003Cp>\u003C\u002Fp>\n\u003Cp>本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 \u003Ccode>gender\u003C\u002Fcode>，在插入数据时，我们的示例代码大致如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>User user = new User();\nuser.setName("张三");\n\u002F\u002F 0: 女， 1: 男\nuser.setGender(1);\nuser.setAge(20);\nuserMapper.insert(user);\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>这种编码方式不够优雅，被领导发现了，估计要请你去好好谈一谈了。针对那些表字段是固定几个值的情况（比如性别），正确的做法应该是，新建一个通用的性别枚举类，通过枚举类来设置值，步骤如下：\u003C\u002Fp>\n\u003Cp>新建一个 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Getter\npublic enum GenderEnum {\n    WOMAN(0, "女"),\n    MAN(1, "男"),\n    ;\n\n    private final Integer code;\n    private final String desc;\n\n    GenderEnum(Integer code, String desc) {\n        this.code = code;\n        this.desc = desc;\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>然后插入数据代码如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>@Test\nvoid testEnum() {\n    User user = new User();\n    user.setName("张三");\n    user.setGender(GenderEnum.MAN.getCode());\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>这样，针对需要设置获取性别的地方，枚举可以重复利用，代码可读性提升，更不容易发生数值设置错误的情况发生。\u003C\u002Fp>\n\u003Cp>\u003Cem>问题来了，可不可以直接设置实体类中性别字段为枚举呢？\u003C\u002Fem>\u003C\u002Fp>\n\u003Cp>答案是可以的，也正是本文要讲的内容，接下来看看要如何做。\u003C\u002Fp>\n\u003Ch2>依赖版本\u003C\u002Fh2>\n\u003Cp>Mybatis Plus 的版本推荐大于等于 \u003Ccode>3.5.2\u003C\u002Fcode>， 因为从这个版本后，通用枚举配置步骤根据方便了：\u003C\u002Fp>\n\u003Cpre>\u003Ccode><dependency>\n    <groupId>com.baomidou<\u002FgroupId>\n    <artifactId>mybatis-plus-boot-starter<\u002FartifactId>\n    <version>3.5.2<\u002Fversion>\n<\u002Fdependency>\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>表结构\u003C\u002Fh2>\n\u003Cp>测试用户表执行脚本如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>DROP TABLE IF EXISTS t_user;\n\nCREATE TABLE `t_user` (\n  `id` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '主键ID',\n  `name` varchar(30) NOT NULL DEFAULT '' COMMENT '姓名',\n  `age` int(11) NULL DEFAULT NULL COMMENT '年龄',\n  `gender` tinyint(2) NOT NULL DEFAULT 0 COMMENT '性别，0：女 1：男',\n  PRIMARY KEY (`id`)\n) COMMENT = '用户表';\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>新建枚举类\u003C\u002Fh2>\n\u003Cp>在项目根目录下，新建包 \u003Ccode>enums\u003C\u002Fcode>, 用于统一放置项目枚举类，并新建 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cp>\n\u003Cimg src=\"\u002Fupload\u002F167359425246371-MHdo.jpg\" loading=\"lazy\">\n\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Getter\npublic enum GenderEnum {\n    WOMAN(0, "女"),\n    MAN(1, "男"),\n    ;\n\n    @EnumValue\n    private final Integer code;\n    private final String desc;\n\n\n    GenderEnum(Integer code, String desc) {\n        this.code = code;\n        this.desc = desc;\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cblockquote>\n\u003Cp>注意：\u003Ccode>@EnumValue\u003C\u002Fcode>  注解用于告诉 MP 存数据时，使用 \u003Ccode>code\u003C\u002Fcode> 字段的值。\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch2>实体类\u003C\u002Fh2>\n\u003Cp>将前面小节中，新建的用户实体类中的性别字段改成枚举：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2022-12-13 14:13\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Data\n@TableName("t_user")\npublic class User {\n    \u002F**\n     * 主键 ID\n     *\u002F\n    @TableId(value = "id", type = IdType.AUTO)\n    private Long id;\n    \u002F**\n     * 姓名\n     *\u002F\n    private String name;\n    \u002F**\n     * 年龄\n     *\u002F\n    private Integer age;\n    \u002F**\n     * 性别\n     *\u002F\n    private GenderEnum gender;\n}\n\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>单元测试\u003C\u002Fh2>\n\u003Cp>新建一个单元测试，设置性别的时候，就可以直接使用枚举类了：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>@Test\nvoid testEnum() {\n    User user = new User();\n    user.setName("张三");\n    user.setGender(GenderEnum.MAN);\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>运行该单元测试，看看好不好使：\u003C\u002Fp>\n\u003Cp>\n\u003Cimg src=\"\u002Fupload\u002F167359471093833-ElLN.jpg\" loading=\"lazy\">\n\u003C\u002Fp>\n\u003Cp>成功设置了对应的数值，搞定。\u003C\u002Fp>\n\u003Ch2>结语\u003C\u002Fh2>\n\u003Cp>本小节中，我们结合具体代码示例，学习了如何在 Mybatis Plus 中使用通用枚举类，希望对小伙伴们有帮助。\u003C\u002Fp>\n13:T4e07,\u003Ch2 id=\"toc-0\">前言\u003C\u002Fh2>\n\u003Cp>\u003C\u002Fp>\n\u003Cp>本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 \u003Ccode>gender\u003C\u002Fcode>，在插入数据时，我们的示例代码大致如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"User%20user%20%3D%20new%20User()%3B%0Auser.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%2F%2F%200%3A%20%E5%A5%B3%EF%BC%8C%201%3A%20%E7%94%B7%0Auser.setGender(1)%3B%0Auser.setAge(20)%3B%0AuserMapper.insert(user)%3B%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">\u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\nuser.setName(\"张三\");\n\u002F\u002F 0: 女， 1: 男\nuser.setGender(1);\nuser.setAge(20);\nuserMapper.insert(user);\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>这种编码方式不够优雅，被领导发现了，估计要请你去好好谈一谈了。针对那些表字段是固定几个值的情况（比如性别），正确的做法应该是，新建一个通用的性别枚举类，通过枚举类来设置值，步骤如下：\u003C\u002Fp>\n\u003Cp>新建一个 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202023-01-13%2014%3A15%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Getter%0Apublic%20enum%20GenderEnum%20%7B%0A%20%20%20%20WOMAN(0%2C%20%22%E5%A5%B3%22)%2C%0A%20%20%20%20MAN(1%2C%20%22%E7%94%B7%22)%2C%0A%20%20%20%20%3B%0A%0A%20%20%20%20private%20final%20Integer%20code%3B%0A%20%20%20%20private%20final%20String%20desc%3B%0A%0A%20%20%20%20GenderEnum(Integer%20code%2C%20String%20desc)%20%7B%0A%20%20%20%20%20%20%20%20this.code%20%3D%20code%3B%0A%20%20%20%20%20%20%20%20this.desc%20%3D%20desc%3B%0A%20%20%20%20%7D%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Getter\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">enum\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">WOMAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">0\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"女\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">MAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">1\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"男\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>code \u003Cspan class=\"token operator\">=\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>desc \u003Cspan class=\"token operator\">=\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>然后插入数据代码如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"%40Test%0Avoid%20testEnum()%20%7B%0A%20%20%20%20User%20user%20%3D%20new%20User()%3B%0A%20%20%20%20user.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%20%20%20%20user.setGender(GenderEnum.MAN.getCode())%3B%0A%20%20%20%20user.setAge(20)%3B%0A%20%20%20%20userMapper.insert(user)%3B%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">@Test\nvoid testEnum() {\n    \u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\n    user.setName(\"张三\");\n    user.setGender(GenderEnum.MAN.getCode());\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>这样，针对需要设置获取性别的地方，枚举可以重复利用，代码可读性提升，更不容易发生数值设置错误的情况发生。\u003C\u002Fp>\n\u003Cp>\u003Cem>问题来了，可不可以直接设置实体类中性别字段为枚举呢？\u003C\u002Fem>\u003C\u002Fp>\n\u003Cp>答案是可以的，也正是本文要讲的内容，接下来看看要如何做。\u003C\u002Fp>\n\u003Ch2 id=\"toc-1\">依赖版本\u003C\u002Fh2>\n\u003Cp>Mybatis Plus 的版本推荐大于等于 \u003Ccode>3.5.2\u003C\u002Fcode>， 因为从这个版本后，通用枚举配置步骤根据方便了：\u003C\u002Fp>\n\u003Cdiv class=\"language-xml\" data-ext=\"xml\" data-code=\"%3Cdependency%3E%0A%20%20%20%20%3CgroupId%3Ecom.baomidou%3C%2FgroupId%3E%0A%20%20%20%20%3CartifactId%3Emybatis-plus-boot-starter%3C%2FartifactId%3E%0A%20%20%20%20%3Cversion%3E3.5.2%3C%2Fversion%3E%0A%3C%2Fdependency%3E%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-xml\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>dependency\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>groupId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>com.baomidou\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>groupId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>artifactId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>mybatis-plus-boot-starter\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>artifactId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>version\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>3.5.2\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>version\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>dependency\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-2\">表结构\u003C\u002Fh2>\n\u003Cp>测试用户表执行脚本如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-sql\" data-ext=\"sql\" data-code=\"DROP%20TABLE%20IF%20EXISTS%20t_user%3B%0A%0ACREATE%20TABLE%20%60t_user%60%20(%0A%20%20%60id%60%20bigint(20)%20UNSIGNED%20NOT%20NULL%20AUTO_INCREMENT%20COMMENT%20'%E4%B8%BB%E9%94%AEID'%2C%0A%20%20%60name%60%20varchar(30)%20NOT%20NULL%20DEFAULT%20''%20COMMENT%20'%E5%A7%93%E5%90%8D'%2C%0A%20%20%60age%60%20int(11)%20NULL%20DEFAULT%20NULL%20COMMENT%20'%E5%B9%B4%E9%BE%84'%2C%0A%20%20%60gender%60%20tinyint(2)%20NOT%20NULL%20DEFAULT%200%20COMMENT%20'%E6%80%A7%E5%88%AB%EF%BC%8C0%EF%BC%9A%E5%A5%B3%201%EF%BC%9A%E7%94%B7'%2C%0A%20%20PRIMARY%20KEY%20(%60id%60)%0A)%20COMMENT%20%3D%20'%E7%94%A8%E6%88%B7%E8%A1%A8'%3B%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-sql\">\u003Cspan class=\"token keyword\">DROP\u003C\u002Fspan> \u003Cspan class=\"token keyword\">TABLE\u003C\u002Fspan> \u003Cspan class=\"token keyword\">IF\u003C\u002Fspan> \u003Cspan class=\"token keyword\">EXISTS\u003C\u002Fspan> t_user\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n\u003Cspan class=\"token keyword\">CREATE\u003C\u002Fspan> \u003Cspan class=\"token keyword\">TABLE\u003C\u002Fspan> \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>t_user\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>id\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">bigint\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">20\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token keyword\">UNSIGNED\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">AUTO_INCREMENT\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'主键ID'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>name\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">varchar\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">30\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token string\">''\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'姓名'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>age\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">int\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">11\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'年龄'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>gender\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">tinyint\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">2\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token number\">0\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'性别，0：女 1：男'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token keyword\">PRIMARY\u003C\u002Fspan> \u003Cspan class=\"token keyword\">KEY\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>id\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token string\">'用户表'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-3\">新建枚举类\u003C\u002Fh2>\n\u003Cp>在项目根目录下，新建包 \u003Ccode>enums\u003C\u002Fcode>, 用于统一放置项目枚举类，并新建 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cp>\n\u003Cdiv class=\"img-loading\">\u003Cimg src=\"\u002Fupload\u002F167359425246371-MHdo.jpg\" loading=\"lazy\">\u003C\u002Fdiv>\n\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202023-01-13%2014%3A15%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Getter%0Apublic%20enum%20GenderEnum%20%7B%0A%20%20%20%20WOMAN(0%2C%20%22%E5%A5%B3%22)%2C%0A%20%20%20%20MAN(1%2C%20%22%E7%94%B7%22)%2C%0A%20%20%20%20%3B%0A%0A%20%20%20%20%40EnumValue%0A%20%20%20%20private%20final%20Integer%20code%3B%0A%20%20%20%20private%20final%20String%20desc%3B%0A%0A%0A%20%20%20%20GenderEnum(Integer%20code%2C%20String%20desc)%20%7B%0A%20%20%20%20%20%20%20%20this.code%20%3D%20code%3B%0A%20%20%20%20%20%20%20%20this.desc%20%3D%20desc%3B%0A%20%20%20%20%7D%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Getter\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">enum\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">WOMAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">0\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"女\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">MAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">1\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"男\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token annotation punctuation\">@EnumValue\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n\n    \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>code \u003Cspan class=\"token operator\">=\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>desc \u003Cspan class=\"token operator\">=\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cblockquote>\n\u003Cp>注意：\u003Ccode>@EnumValue\u003C\u002Fcode>  注解用于告诉 MP 存数据时，使用 \u003Ccode>code\u003C\u002Fcode> 字段的值。\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch2 id=\"toc-4\">实体类\u003C\u002Fh2>\n\u003Cp>将前面小节中，新建的用户实体类中的性别字段改成枚举：\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202022-12-13%2014%3A13%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Data%0A%40TableName(%22t_user%22)%0Apublic%20class%20User%20%7B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E4%B8%BB%E9%94%AE%20ID%0A%20%20%20%20%20*%2F%0A%20%20%20%20%40TableId(value%20%3D%20%22id%22%2C%20type%20%3D%20IdType.AUTO)%0A%20%20%20%20private%20Long%20id%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E5%A7%93%E5%90%8D%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20String%20name%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E5%B9%B4%E9%BE%84%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20Integer%20age%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E6%80%A7%E5%88%AB%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20GenderEnum%20gender%3B%0A%7D%0A%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2022-12-13 14:13\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Data\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@TableName\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token string\">\"t_user\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">class\u003C\u002Fspan> \u003Cspan class=\"token class-name\">User\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 主键 ID\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token annotation punctuation\">@TableId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>value \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token string\">\"id\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> type \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token class-name\">IdType\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>\u003Cspan class=\"token constant\">AUTO\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Long\u003C\u002Fspan> id\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 姓名\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> name\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 年龄\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> age\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 性别\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> gender\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-5\">单元测试\u003C\u002Fh2>\n\u003Cp>新建一个单元测试，设置性别的时候，就可以直接使用枚举类了：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"%40Test%0Avoid%20testEnum()%20%7B%0A%20%20%20%20User%20user%20%3D%20new%20User()%3B%0A%20%20%20%20user.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%20%20%20%20user.setGender(GenderEnum.MAN)%3B%0A%20%20%20%20user.setAge(20)%3B%0A%20%20%20%20userMapper.insert(user)%3B%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">@Test\nvoid testEnum() {\n    \u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\n    user.setName(\"张三\");\n    user.setGender(GenderEnum.MAN);\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>运行该单元测试，看看好不好使：\u003C\u002Fp>\n\u003Cp>\n\u003Cdiv class=\"img-loading\">\u003Cimg src=\"\u002Fupload\u002F167359471093833-ElLN.jpg\" loading=\"lazy\">\u003C\u002Fdiv>\n\u003C\u002Fp>\n\u003Cp>成功设置了对应的数值，搞定。\u003C\u002Fp>\n\u003Ch2 id=\"toc-6\">结语\u003C\u002Fh2>\n\u003Cp>本小节中，我们结合具体代码示例，学习了如何在 Mybatis Plus 中使用通用枚举类，希望对小伙伴们有帮助。\u003C\u002Fp>","\u003Cp>大家好。\u003C\u002Fp>\n\u003Cp>本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 \u003Ccode>gender\u003C\u002Fcode>，在插入数据时，我们的示例代码大致如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>User user = new User();\nuser.setName("张三");\n\u002F\u002F 0: 女， 1: 男\nuser.setGender(1);\nuser.setAge(20);\nuserMapper.insert(user);\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>这种编码方式不够优雅，被领导发现了，估计要请你去好好谈一谈了。针对那些表字段是固定几个值的情况（比如性别），正确的做法应该是，新建一个通用的性别枚举类，通过枚举类来设置值，步骤如下：\u003C\u002Fp>\n\u003Cp>新建一个 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Getter\npublic enum GenderEnum {\n    WOMAN(0, "女"),\n    MAN(1, "男"),\n    ;\n\n    private final Integer code;\n    private final String desc;\n\n    GenderEnum(Integer code, String desc) {\n        this.code = code;\n        this.desc = desc;\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>然后插入数据代码如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>@Test\nvoid testEnum() {\n    User user = new User();\n    user.setName("张三");\n    user.setGender(GenderEnum.MAN.getCode());\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>这样，针对需要设置获取性别的地方，枚举可以重复利用，代码可读性提升，更不容易发生数值设置错误的情况发生。\u003C\u002Fp>\n\u003Cp>\u003Cem>问题来了，可不可以直接设置实体类中性别字段为枚举呢？\u003C\u002Fem>\u003C\u002Fp>\n\u003Cp>答案是可以的，也正是本文要讲的内容，接下来看看要如何做。\u003C\u002Fp>\n\u003Ch2>依赖版本\u003C\u002Fh2>\n\u003Cp>Mybatis Plus 的版本推荐大于等于 \u003Ccode>3.5.2\u003C\u002Fcode>， 因为从这个版本后，通用枚举配置步骤根据方便了：\u003C\u002Fp>\n\u003Cpre>\u003Ccode><dependency>\n    <groupId>com.baomidou<\u002FgroupId>\n    <artifactId>mybatis-plus-boot-starter<\u002FartifactId>\n    <version>3.5.2<\u002Fversion>\n<\u002Fdependency>\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>表结构\u003C\u002Fh2>\n\u003Cp>测试用户表执行脚本如下：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>DROP TABLE IF EXISTS t_user;\n\nCREATE TABLE `t_user` (\n  `id` bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '主键ID',\n  `name` varchar(30) NOT NULL DEFAULT '' COMMENT '姓名',\n  `age` int(11) NULL DEFAULT NULL COMMENT '年龄',\n  `gender` tinyint(2) NOT NULL DEFAULT 0 COMMENT '性别，0：女 1：男',\n  PRIMARY KEY (`id`)\n) COMMENT = '用户表';\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>新建枚举类\u003C\u002Fh2>\n\u003Cp>在项目根目录下，新建包 \u003Ccode>enums\u003C\u002Fcode>, 用于统一放置项目枚举类，并新建 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cp>\n\u003Cimg src=\"\u002Fupload\u002F167359425246371-MHdo.jpg\" loading=\"lazy\">\n\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Getter\npublic enum GenderEnum {\n    WOMAN(0, "女"),\n    MAN(1, "男"),\n    ;\n\n    @EnumValue\n    private final Integer code;\n    private final String desc;\n\n\n    GenderEnum(Integer code, String desc) {\n        this.code = code;\n        this.desc = desc;\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cblockquote>\n\u003Cp>注意：\u003Ccode>@EnumValue\u003C\u002Fcode>  注解用于告诉 MP 存数据时，使用 \u003Ccode>code\u003C\u002Fcode> 字段的值。\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch2>实体类\u003C\u002Fh2>\n\u003Cp>将前面小节中，新建的用户实体类中的性别字段改成枚举：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>\u002F**\n * @author: 张三\n * @date: 2022-12-13 14:13\n * @version: v1.0.0\n * @description: TODO\n **\u002F\n@Data\n@TableName("t_user")\npublic class User {\n    \u002F**\n     * 主键 ID\n     *\u002F\n    @TableId(value = "id", type = IdType.AUTO)\n    private Long id;\n    \u002F**\n     * 姓名\n     *\u002F\n    private String name;\n    \u002F**\n     * 年龄\n     *\u002F\n    private Integer age;\n    \u002F**\n     * 性别\n     *\u002F\n    private GenderEnum gender;\n}\n\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Ch2>单元测试\u003C\u002Fh2>\n\u003Cp>新建一个单元测试，设置性别的时候，就可以直接使用枚举类了：\u003C\u002Fp>\n\u003Cpre>\u003Ccode>@Test\nvoid testEnum() {\n    User user = new User();\n    user.setName("张三");\n    user.setGender(GenderEnum.MAN);\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n\u003Cp>运行该单元测试，看看好不好使：\u003C\u002Fp>\n\u003Cp>\n\u003Cimg src=\"\u002Fupload\u002F167359471093833-ElLN.jpg\" loading=\"lazy\">\n\u003C\u002Fp>\n\u003Cp>成功设置了对应的数值，搞定。\u003C\u002Fp>\n\u003Ch2>结语\u003C\u002Fh2>\n\u003Cp>本小节中，我们结合具体代码示例，学习了如何在 Mybatis Plus 中使用通用枚举类，希望对小伙伴们有帮助。\u003C\u002Fp>\n13:T4e07,\u003Ch2 id=\"toc-0\">前言\u003C\u002Fh2>\n\u003Cp>大家好。\u003C\u002Fp>\n\u003Cp>本小节中，我们将讲解 Mybatis Plus 通用枚举的用法。那么，什么是通用枚举呢？之前小节中，我们的用户表有个性别字段 \u003Ccode>gender\u003C\u002Fcode>，在插入数据时，我们的示例代码大致如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"User%20user%20%3D%20new%20User()%3B%0Auser.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%2F%2F%200%3A%20%E5%A5%B3%EF%BC%8C%201%3A%20%E7%94%B7%0Auser.setGender(1)%3B%0Auser.setAge(20)%3B%0AuserMapper.insert(user)%3B%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">\u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\nuser.setName(\"张三\");\n\u002F\u002F 0: 女， 1: 男\nuser.setGender(1);\nuser.setAge(20);\nuserMapper.insert(user);\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>这种编码方式不够优雅，被领导发现了，估计要请你去好好谈一谈了。针对那些表字段是固定几个值的情况（比如性别），正确的做法应该是，新建一个通用的性别枚举类，通过枚举类来设置值，步骤如下：\u003C\u002Fp>\n\u003Cp>新建一个 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202023-01-13%2014%3A15%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Getter%0Apublic%20enum%20GenderEnum%20%7B%0A%20%20%20%20WOMAN(0%2C%20%22%E5%A5%B3%22)%2C%0A%20%20%20%20MAN(1%2C%20%22%E7%94%B7%22)%2C%0A%20%20%20%20%3B%0A%0A%20%20%20%20private%20final%20Integer%20code%3B%0A%20%20%20%20private%20final%20String%20desc%3B%0A%0A%20%20%20%20GenderEnum(Integer%20code%2C%20String%20desc)%20%7B%0A%20%20%20%20%20%20%20%20this.code%20%3D%20code%3B%0A%20%20%20%20%20%20%20%20this.desc%20%3D%20desc%3B%0A%20%20%20%20%7D%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Getter\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">enum\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">WOMAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">0\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"女\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">MAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">1\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"男\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>code \u003Cspan class=\"token operator\">=\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>desc \u003Cspan class=\"token operator\">=\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>然后插入数据代码如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"%40Test%0Avoid%20testEnum()%20%7B%0A%20%20%20%20User%20user%20%3D%20new%20User()%3B%0A%20%20%20%20user.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%20%20%20%20user.setGender(GenderEnum.MAN.getCode())%3B%0A%20%20%20%20user.setAge(20)%3B%0A%20%20%20%20userMapper.insert(user)%3B%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">@Test\nvoid testEnum() {\n    \u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\n    user.setName(\"张三\");\n    user.setGender(GenderEnum.MAN.getCode());\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>这样，针对需要设置获取性别的地方，枚举可以重复利用，代码可读性提升，更不容易发生数值设置错误的情况发生。\u003C\u002Fp>\n\u003Cp>\u003Cem>问题来了，可不可以直接设置实体类中性别字段为枚举呢？\u003C\u002Fem>\u003C\u002Fp>\n\u003Cp>答案是可以的，也正是本文要讲的内容，接下来看看要如何做。\u003C\u002Fp>\n\u003Ch2 id=\"toc-1\">依赖版本\u003C\u002Fh2>\n\u003Cp>Mybatis Plus 的版本推荐大于等于 \u003Ccode>3.5.2\u003C\u002Fcode>， 因为从这个版本后，通用枚举配置步骤根据方便了：\u003C\u002Fp>\n\u003Cdiv class=\"language-xml\" data-ext=\"xml\" data-code=\"%3Cdependency%3E%0A%20%20%20%20%3CgroupId%3Ecom.baomidou%3C%2FgroupId%3E%0A%20%20%20%20%3CartifactId%3Emybatis-plus-boot-starter%3C%2FartifactId%3E%0A%20%20%20%20%3Cversion%3E3.5.2%3C%2Fversion%3E%0A%3C%2Fdependency%3E%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-xml\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>dependency\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>groupId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>com.baomidou\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>groupId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>artifactId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>mybatis-plus-boot-starter\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>artifactId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n    \u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u003C\u002Fspan>version\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>3.5.2\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>version\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n\u003Cspan class=\"token tag\">\u003Cspan class=\"token tag\">\u003Cspan class=\"token punctuation\"><\u002F\u003C\u002Fspan>dependency\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">>\u003C\u002Fspan>\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-2\">表结构\u003C\u002Fh2>\n\u003Cp>测试用户表执行脚本如下：\u003C\u002Fp>\n\u003Cdiv class=\"language-sql\" data-ext=\"sql\" data-code=\"DROP%20TABLE%20IF%20EXISTS%20t_user%3B%0A%0ACREATE%20TABLE%20%60t_user%60%20(%0A%20%20%60id%60%20bigint(20)%20UNSIGNED%20NOT%20NULL%20AUTO_INCREMENT%20COMMENT%20'%E4%B8%BB%E9%94%AEID'%2C%0A%20%20%60name%60%20varchar(30)%20NOT%20NULL%20DEFAULT%20''%20COMMENT%20'%E5%A7%93%E5%90%8D'%2C%0A%20%20%60age%60%20int(11)%20NULL%20DEFAULT%20NULL%20COMMENT%20'%E5%B9%B4%E9%BE%84'%2C%0A%20%20%60gender%60%20tinyint(2)%20NOT%20NULL%20DEFAULT%200%20COMMENT%20'%E6%80%A7%E5%88%AB%EF%BC%8C0%EF%BC%9A%E5%A5%B3%201%EF%BC%9A%E7%94%B7'%2C%0A%20%20PRIMARY%20KEY%20(%60id%60)%0A)%20COMMENT%20%3D%20'%E7%94%A8%E6%88%B7%E8%A1%A8'%3B%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-sql\">\u003Cspan class=\"token keyword\">DROP\u003C\u002Fspan> \u003Cspan class=\"token keyword\">TABLE\u003C\u002Fspan> \u003Cspan class=\"token keyword\">IF\u003C\u002Fspan> \u003Cspan class=\"token keyword\">EXISTS\u003C\u002Fspan> t_user\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n\u003Cspan class=\"token keyword\">CREATE\u003C\u002Fspan> \u003Cspan class=\"token keyword\">TABLE\u003C\u002Fspan> \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>t_user\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>id\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">bigint\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">20\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token keyword\">UNSIGNED\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">AUTO_INCREMENT\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'主键ID'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>name\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">varchar\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">30\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token string\">''\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'姓名'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>age\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">int\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">11\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'年龄'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>gender\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan> \u003Cspan class=\"token keyword\">tinyint\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">2\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token operator\">NOT\u003C\u002Fspan> \u003Cspan class=\"token boolean\">NULL\u003C\u002Fspan> \u003Cspan class=\"token keyword\">DEFAULT\u003C\u002Fspan> \u003Cspan class=\"token number\">0\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token string\">'性别，0：女 1：男'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n  \u003Cspan class=\"token keyword\">PRIMARY\u003C\u002Fspan> \u003Cspan class=\"token keyword\">KEY\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token identifier\">\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>id\u003Cspan class=\"token punctuation\">`\u003C\u002Fspan>\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token keyword\">COMMENT\u003C\u002Fspan> \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token string\">'用户表'\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-3\">新建枚举类\u003C\u002Fh2>\n\u003Cp>在项目根目录下，新建包 \u003Ccode>enums\u003C\u002Fcode>, 用于统一放置项目枚举类，并新建 \u003Ccode>GenderEnum\u003C\u002Fcode> 枚举：\u003C\u002Fp>\n\u003Cp>\n\u003Cdiv class=\"img-loading\">\u003Cimg src=\"\u002Fupload\u002F167359425246371-MHdo.jpg\" loading=\"lazy\">\u003C\u002Fdiv>\n\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202023-01-13%2014%3A15%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Getter%0Apublic%20enum%20GenderEnum%20%7B%0A%20%20%20%20WOMAN(0%2C%20%22%E5%A5%B3%22)%2C%0A%20%20%20%20MAN(1%2C%20%22%E7%94%B7%22)%2C%0A%20%20%20%20%3B%0A%0A%20%20%20%20%40EnumValue%0A%20%20%20%20private%20final%20Integer%20code%3B%0A%20%20%20%20private%20final%20String%20desc%3B%0A%0A%0A%20%20%20%20GenderEnum(Integer%20code%2C%20String%20desc)%20%7B%0A%20%20%20%20%20%20%20%20this.code%20%3D%20code%3B%0A%20%20%20%20%20%20%20%20this.desc%20%3D%20desc%3B%0A%20%20%20%20%7D%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2023-01-13 14:15\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Getter\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">enum\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">WOMAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">0\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"女\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token function\">MAN\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token number\">1\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token string\">\"男\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n    \u003Cspan class=\"token annotation punctuation\">@EnumValue\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token keyword\">final\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\n\n    \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>code \u003Cspan class=\"token operator\">=\u003C\u002Fspan> code\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n        \u003Cspan class=\"token keyword\">this\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>desc \u003Cspan class=\"token operator\">=\u003C\u002Fspan> desc\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cblockquote>\n\u003Cp>注意：\u003Ccode>@EnumValue\u003C\u002Fcode>  注解用于告诉 MP 存数据时，使用 \u003Ccode>code\u003C\u002Fcode> 字段的值。\u003C\u002Fp>\n\u003C\u002Fblockquote>\n\u003Ch2 id=\"toc-4\">实体类\u003C\u002Fh2>\n\u003Cp>将前面小节中，新建的用户实体类中的性别字段改成枚举：\u003C\u002Fp>\n\u003Cdiv class=\"language-java\" data-ext=\"java\" data-code=\"%2F**%0A%20*%20%40author%3A%20%E5%BC%A0%E4%B8%89%0A%20*%20%40from%3A%20%E5%85%AC%E4%BC%97%E5%8F%B7%EF%BC%9A%E5%BC%A0%E4%B8%89%2C%20%E7%BD%91%E7%AB%99%EF%BC%9Awww.mashangan.com%0A%20*%20%40date%3A%202022-12-13%2014%3A13%0A%20*%20%40version%3A%20v1.0.0%0A%20*%20%40description%3A%20TODO%0A%20**%2F%0A%40Data%0A%40TableName(%22t_user%22)%0Apublic%20class%20User%20%7B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E4%B8%BB%E9%94%AE%20ID%0A%20%20%20%20%20*%2F%0A%20%20%20%20%40TableId(value%20%3D%20%22id%22%2C%20type%20%3D%20IdType.AUTO)%0A%20%20%20%20private%20Long%20id%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E5%A7%93%E5%90%8D%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20String%20name%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E5%B9%B4%E9%BE%84%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20Integer%20age%3B%0A%20%20%20%20%2F**%0A%20%20%20%20%20*%20%E6%80%A7%E5%88%AB%0A%20%20%20%20%20*%2F%0A%20%20%20%20private%20GenderEnum%20gender%3B%0A%7D%0A%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-java\">\u003Cspan class=\"token comment\">\u002F**\n * @author: 张三\n * @date: 2022-12-13 14:13\n * @version: v1.0.0\n * @description: TODO\n **\u002F\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@Data\u003C\u002Fspan>\n\u003Cspan class=\"token annotation punctuation\">@TableName\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>\u003Cspan class=\"token string\">\"t_user\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n\u003Cspan class=\"token keyword\">public\u003C\u002Fspan> \u003Cspan class=\"token keyword\">class\u003C\u002Fspan> \u003Cspan class=\"token class-name\">User\u003C\u002Fspan> \u003Cspan class=\"token punctuation\">{\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 主键 ID\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token annotation punctuation\">@TableId\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">(\u003C\u002Fspan>value \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token string\">\"id\"\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">,\u003C\u002Fspan> type \u003Cspan class=\"token operator\">=\u003C\u002Fspan> \u003Cspan class=\"token class-name\">IdType\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">.\u003C\u002Fspan>\u003Cspan class=\"token constant\">AUTO\u003C\u002Fspan>\u003Cspan class=\"token punctuation\">)\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Long\u003C\u002Fspan> id\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 姓名\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">String\u003C\u002Fspan> name\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 年龄\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">Integer\u003C\u002Fspan> age\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n    \u003Cspan class=\"token comment\">\u002F**\n     * 性别\n     *\u002F\u003C\u002Fspan>\n    \u003Cspan class=\"token keyword\">private\u003C\u002Fspan> \u003Cspan class=\"token class-name\">GenderEnum\u003C\u002Fspan> gender\u003Cspan class=\"token punctuation\">;\u003C\u002Fspan>\n\u003Cspan class=\"token punctuation\">}\u003C\u002Fspan>\n\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Ch2 id=\"toc-5\">单元测试\u003C\u002Fh2>\n\u003Cp>新建一个单元测试，设置性别的时候，就可以直接使用枚举类了：\u003C\u002Fp>\n\u003Cdiv class=\"language-dockerfile\" data-ext=\"dockerfile\" data-code=\"%40Test%0Avoid%20testEnum()%20%7B%0A%20%20%20%20User%20user%20%3D%20new%20User()%3B%0A%20%20%20%20user.setName(%22%E5%BC%A0%E4%B8%89%22)%3B%0A%20%20%20%20user.setGender(GenderEnum.MAN)%3B%0A%20%20%20%20user.setAge(20)%3B%0A%20%20%20%20userMapper.insert(user)%3B%0A%7D%0A\">\n        \u003Cbutton class=\"vp-copy-code-button\" data-copy data-copied=\"已复制\" aria-label=\"复制代码\">\u003C\u002Fbutton>\n        \u003Cpre>\u003Ccode class=\"language-dockerfile\">@Test\nvoid testEnum() {\n    \u003Cspan class=\"token instruction\">\u003Cspan class=\"token keyword\">User\u003C\u002Fspan> user = new User();\u003C\u002Fspan>\n    user.setName(\"张三\");\n    user.setGender(GenderEnum.MAN);\n    user.setAge(20);\n    userMapper.insert(user);\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\n      \u003C\u002Fdiv>\n\u003Cp>运行该单元测试，看看好不好使：\u003C\u002Fp>\n\u003Cp>\n\u003Cdiv class=\"img-loading\">\u003Cimg src=\"\u002Fupload\u002F167359471093833-ElLN.jpg\" loading=\"lazy\">\u003C\u002Fdiv>\n\u003C\u002Fp>\n\u003Cp>成功设置了对应的数值，搞定。\u003C\u002Fp>\n\u003Ch2 id=\"toc-6\">结语\u003C\u002Fh2>\n\u003Cp>本小节中，我们结合具体代码示例，学习了如何在 Mybatis Plus 中使用通用枚举类，希望对小伙伴们有帮助。\u003C\u002Fp>"]