MyBatis-plus-Generate 自动生成代码结构实践

一、新建一个springboot项目，并引入依赖

关注mybatis-plus-boot-starter

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.7.6</spring-boot.version>
        <mybatisplus.verion>3.5.1</mybatisplus.verion>
        <mysql-connector-java.version>8.0.28</mysql-connector-java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatisplus.verion}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector-java.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!--spring项目启动器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--通过注解消除实际开发中的样板式代码-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!--spring项目测试启动器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <!--模板引擎-->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.1</version>
        </dependency>

        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.28</version>
            <scope>compile</scope>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>

    </dependencies>

application配置文件

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=UTC
    username: root
    password: 123456
    hikari:
      #最小空闲连接数量
      minimum-idle: 5
      #从池返回的连接默认自动提交
      auto-commit: true
      #空闲连接最大时间，10秒
      idle-timeout: 10000
      #池中连接的最长生命周期
      max-lifetime: 1800000
      #数据库连接的超时时间
      connection-timeout: 30000

二、在项目中新建一个generate文件

package com.example.demo.utils;


import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;

public class Generator {
    public static void main(String[] args) {
        //1. 创建代码生成器对象，执行生成代码操作
        AutoGenerator autoGenerator = new AutoGenerator();

        //2. 数据源相关配置：读取数据库中的信息，根据数据库表结构生成代码
        DataSourceConfig dataSource = new DataSourceConfig();
        dataSource.setDriverName("com.mysql.cj.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/demo?serverTimezone=UTC");
        dataSource.setUsername("root");
        dataSource.setPassword("123456");
        autoGenerator.setDataSource(dataSource);


        // 设置全局配置
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir("C:\\demo\\src\\main\\java");  //生成路径(一般都是生成在此项目的src/main/java下面)
        globalConfig.setOpen(true);                 //设置生成完毕后是否打开生成代码所在的目录
        globalConfig.setAuthor("Auto");              //设置作者
        globalConfig.setFileOverride(true);         //设置是否覆盖原始生成的文件
        globalConfig.setMapperName("%sDao");        //设置数据层接口名，%s为占位符，指代模块名称
        globalConfig.setIdType(IdType.ASSIGN_ID);   //设置Id生成策略
        autoGenerator.setGlobalConfig(globalConfig);

        // 设置包名相关配置
        PackageConfig packageInfo = new PackageConfig();
        packageInfo.setParent("demo.cn");   //设置生成的包名，与代码所在位置不冲突，二者叠加组成完整路径
        packageInfo.setEntity("domain");        //设置实体类包名
        packageInfo.setMapper("dao");           //设置数据层包名
        autoGenerator.setPackageInfo(packageInfo);

        // 策略设置
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig.setInclude("info");  //设置当前参与生成的表名，参数为可变参数
        strategyConfig.setTablePrefix("");  //设置数据库表的前缀名称，模块名 = 数据库表名 - 前缀名  例如： User = tbl_user - tbl_
        strategyConfig.setRestControllerStyle(true);        //设置是否启用Rest风格
        strategyConfig.setEntityLombokModel(true);          //设置是否启用lombok
        autoGenerator.setStrategy(strategyConfig);
        // 执行生成操作
        autoGenerator.execute();
    }
}

三、运行可生成代码