1、废话不多说，先直接上一键生成效果吧！

1.1、未生成前

1.2、一键生成后（不掺杂任何创建包名，纯天然无污染）

2、代码生成器模块——generator

2.1 pom.xml

    <dependencies>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.30</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.30</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.0</version>
        </dependency>
    </dependencies>

2.2 CodeGenerator.java，修改数据源信息，然后运行main方法，就可以一键生成entity,mapper,mapper.xml,service,serviceImpl,controller。注意：必须保证能够连接到数据库且表存在。

public class CodeGenerator {

    public static void main(String[] args) {
        generator("HSY",
                "jdbc:mysql://ip:port/数据库名?useUnicode=true&useSSL=false&characterEncoding=utf8",
                "com.mysql.jdbc.Driver",
                "用户名",
                "密码",
                "com.syh.online.shopping.mall",
                "OnlineShoppingMall",
                "authority",
                "user");
    }

    /**
     * Mybatis一键生成entity,mapper,mapper.xml,service,serviceImpl,controller
     * @param author            开发人员
     * @param url               驱动连接的URL
     * @param driverName        驱动名称
     * @param username          数据库连接用户名
     * @param password          数据库连接密码
     * @param parent            父包名。如果为空，将下面子包名必须写全部， 否则就只需写子包名
     * @param projectModule     项目模块包名
     * @param functionModule    功能模块包名
     * @param tableName         表名
     */
    public static void generator(String author,
                                 String url,
                                 String driverName,
                                 String username,
                                 String password,
                                 String parent,
                                 String projectModule,
                                 String functionModule,
                                 String tableName) {
        AutoGenerator mpg = new AutoGenerator();
        mpg.setGlobalConfig(globalConfig(author, projectModule));
        mpg.setDataSource(dataSourceConfig(url, driverName, username, password));
        mpg.setPackageInfo(packageConfig(parent, functionModule));
        mpg.setTemplate(templateConfig());
        mpg.setStrategy(strategyConfig(tableName));
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }

    /**
     * 全局配置
     * @param author            开发人员
     * @param projectModule     项目模块包名
     * @return                  GlobalConfig
     */
    private static GlobalConfig globalConfig (String author, String projectModule) {
        String projectPath = System.getProperty("user.dir");
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir(projectPath + "/" + projectModule + "/src/main/java");
        globalConfig.setFileOverride(true);
        globalConfig.setAuthor(author);
        globalConfig.setSwagger2(true);
        globalConfig.setOpen(false);
        globalConfig.setEnableCache(false);
        globalConfig.setKotlin(false);
        globalConfig.setActiveRecord(false);
        globalConfig.setBaseResultMap(false);
        globalConfig.setBaseColumnList(false);
        globalConfig.setEntityName("%sVo");
        globalConfig.setMapperName("");
        globalConfig.setXmlName("");
        globalConfig.setServiceName("");
        globalConfig.setServiceImplName("");
        globalConfig.setControllerName("");
        return globalConfig;
    }

    /**
     * 数据源设置
     * @param url           驱动连接的URL
     * @param driverName    驱动名称
     * @param username      数据库连接用户名
     * @param password      数据库连接密码
     * @return              DataSourceConfig
     */
    private static DataSourceConfig dataSourceConfig (String url,
                                                      String driverName,
                                                      String username,
                                                      String password) {
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setDbType(DbType.MYSQL);
        dataSourceConfig.setUrl(url);
        dataSourceConfig.setDriverName(driverName);
        dataSourceConfig.setUsername(username);
        dataSourceConfig.setPassword(password);
        return dataSourceConfig;
    }

    /**
     * 包配置
     * @param parent            父包名。如果为空，将下面子包名必须写全部， 否则就只需写子包名
     * @param functionModule    功能模块包名
     * @return                  PackageConfig
     */
    private static PackageConfig packageConfig (String parent, String functionModule) {
        PackageConfig packageConfig = new PackageConfig();
        packageConfig.setParent(parent);
        packageConfig.setEntity("entity." + functionModule);
        packageConfig.setService("service." + functionModule);
        packageConfig.setServiceImpl("service.impl." + functionModule);
        packageConfig.setMapper("mapper." + functionModule);
        packageConfig.setXml("mapper.xml." + functionModule);
        packageConfig.setController("controller." + functionModule);
        return packageConfig;
    }

    /**
     * 模板路径配置项
     * @return  TemplateConfig
     */
    private static TemplateConfig templateConfig () {
        TemplateConfig templateConfig = new TemplateConfig();
        templateConfig.setXml(ConstVal.TEMPLATE_XML);
        return templateConfig;
    }

    /**
     * 策略配置
     * @param tableName     数据库表名称，多个用英文逗号隔开
     * @return              StrategyConfig
     */
    private static StrategyConfig strategyConfig (String tableName) {
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig.setNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel);
        strategyConfig.setEntityLombokModel(true);
        strategyConfig.setRestControllerStyle(true);
        strategyConfig.setSuperEntityColumns("id");
        strategyConfig.setInclude(tableName);
        strategyConfig.setControllerMappingHyphenStyle(true);
        return strategyConfig;
    }
}

2.3 Demo的GitHub地址：https://github.com/huamgsiyu/CustomGenerator