1、引入相关依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.1</version>
</dependency>
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.1</version>
</dependency>

<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-extension</artifactId>
    <version>3.4.3</version>
</dependency>

2、编写生成代码

FastAutoGenerator.create("jdbc:mysql://127.0.0.1:3306/liukx",
                "root", "zxc.10086")
        .globalConfig(builder -> {
            builder.author("liukx") // 设置作者
                    .enableSwagger() // 开启 swagger 模式
                    .fileOverride() // 覆盖已生成文件
                    .outputDir("E:\\code\\Generator\\src\\main\\java"); // 指定输出目录
        })
        .packageConfig(builder -> {
            builder.parent("com.liukx") // 设置父包名
                    .moduleName("generator") // 设置父包模块名
                    .pathInfo(Collections.singletonMap(OutputFile.mapper, "E:\\code\\Generator\\src\\main\\java\\com\\liukx\\generator\\mapper")); // 设置mapperXml生成路径
        })
        .strategyConfig(builder -> {
            builder.addInclude("sys_user") // 设置需要生成的表名
                    .addTablePrefix("t_", "c_"); // 设置过滤表前缀
        })
        .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
        .execute();

3、补全Swagger依赖

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

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