官网：https://baomidou.com/pages/779a6e/

依赖文件

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>mybatis-plus-generator</artifactId>
  <version>3.5.2</version>
</dependency>
<!-- freemarker -->
<dependency>
	<groupId>org.freemarker</groupId>
	<artifactId>freemarker</artifactId>
</dependency>

生成代码

public class codeGenerate {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/admin_system";
        String username = "root";
        String password = "liuyang";

        String tables = "x_user,x_role,x_menu,x_user_role,x_role_menu";
        String prefix_tables = "x_"; // 设置过滤表前缀
        String moduleName = "sys"; // 设置需要生成的表名
        // 父包名
        String parent = "com.thexb";
        // 项目路径
        String projectPath = "D:\\\\FullStack\\\\admin_system\\\\back\\\\src\\\\main\\\\java";
        // 设置mapperXml生成路径
        String mapperLocation = "D:\\\\FullStack\\\\admin_system\\\\back\\\\src\\\\main\\\\resources\\\\mapper\\\\" + moduleName;

        FastAutoGenerator.create(url, username, password)
            .globalConfig(builder -> {
                builder.author("thexb") // 设置作者
                    // .enableSwagger() // 开启 swagger 模式
                    // .fileOverride() // 覆盖已生成文件
                    .outputDir(projectPath); // 指定输出目录
            })
            .packageConfig(builder -> {
                builder.parent(parent)
                    .moduleName(moduleName)
                    .pathInfo(Collections.singletonMap(OutputFile.xml, mapperLocation));
            })
            .strategyConfig(builder -> {
                builder.addInclude(tables)
                    .addTablePrefix(prefix_tables);
            })
            .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
            .execute();
    }
}