引入依赖

<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.3.2</version>
</dependency>
<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><version>3.5.3.2</version>
</dependency>
<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.28</version>
</dependency>

自动生成代码

/*** 配置详情* https://baomidou.com/pages/981406/*/
public class AutoGeneratorCode {public static void main(String[] args) {String url = "jdbc:mysql://localhost:3306/gogogo?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT%2B8&useSSL=false";String username = "root";String password = "root";String outputDir = "xxxxxx/shangan/src/main/java";String mapperOutputDir = "xxxxxx/shangan/src/main/resources/mapper";FastAutoGenerator.create(url, username, password)// 全局配置.globalConfig(builder -> {builder.author("xxxxxx") // 设置作者.outputDir(outputDir); // 指定输出目录}).dataSourceConfig(builder -> builder.typeConvertHandler((globalConfig, typeRegistry, metaInfo) -> {int typeCode = metaInfo.getJdbcType().TYPE_CODE;if (typeCode == Types.SMALLINT) {// 自定义类型转换return DbColumnType.INTEGER;}return typeRegistry.getColumnType(metaInfo);})).packageConfig(builder -> {builder.parent("lzc.shangan") // 设置父包名//.moduleName("system") // 设置父包模块名.pathInfo(Collections.singletonMap(OutputFile.xml, mapperOutputDir)); // 设置mapperXml生成路径}).strategyConfig(builder -> {builder.addInclude("words_info") // 设置需要生成的表名.addTablePrefix("t_", "c_") // 设置过滤表前缀.entityBuilder().enableLombok();}).templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板.execute();}
}