<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.2</version>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.5.3</version>
</dependency>
<!-- velocity 模板引擎, Mybatis Plus 代码生成器需要 -->
<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity-engine-core</artifactId>
    <version>2.3</version>
</dependency>

# application.yml

# DataSource设置
spring:
  datasource:
    url: jdbc:mysql://主机:端口/数据库?serverTimezone=GMT%2B8&useSSL=false&allowPublicKeyRetrieval=true&zeroDateTimeBehavior=CONVERT_TO_NULL
    username: 用户名
    password: 密码

#mybatis日志
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:com/.../包名/mapper/xml/*.xml

@Data
@EqualsAndHashCode(callSuper = false)
public class BaseEntity implements Serializable {

  private static final long serialVersionUID = 1L;

  @ApiModelProperty("ID")
  @TableId(value = "id", type = IdType.ASSIGN_ID)
  private String id;

  @ApiModelProperty("创建时间")
  @TableField(value = "create_time", fill = FieldFill.INSERT)
  private LocalDateTime create_time;

  //  @ApiModelProperty("创建时间")
  //  @TableField(value = "gmt_create", fill = FieldFill.INSERT)
  //  private LocalDateTime gmtCreate;

  //  @ApiModelProperty("更新时间")
  //  @OrderBy(asc = false)
  //  @TableField(value = "gmt_modified", fill = FieldFill.INSERT_UPDATE)
  //  private LocalDateTime gmtModified;
}

@SpringBootTest
class CodeGenerator {
  @Value("${spring.datasource.url}")
  String URL;

  @Value("${spring.datasource.username}")
  String USERNAME;

  @Value("${spring.datasource.password}")
  String PASSWORD;

  @Test
  void generateCode() {
    // 包路径
    String pkgPath = System.getProperty("user.dir") + "/src/main/java";
    /* 父包名 */
    String parentPath = "包名";
    /* 模块名 */
    String modulePath = "";

    FastAutoGenerator.create(URL, USERNAME, PASSWORD)
        /*
        全局配置
        */
        .globalConfig(
            builder ->
                builder
                    // 作者名
                    .author("作者")
                    // 注释日期
                    .commentDate("yyyy-MM-dd")
                    // 时间策略
                    // .dateType(DateType.TIME_PACK)
                    // 开启swagger2
                    .enableSwagger()
                    // 覆盖已生成文件
                    // .fileOverride()
                    // 指定输出路径
                    .outputDir(pkgPath)
                    // 禁止打开输出目录
                    .disableOpenDir())

        /*
        包配置
        */
        .packageConfig(
            builder ->
                builder
                    // 父包名
                    .parent(parentPath)
                    // 父包模块名
                    .moduleName(modulePath))
        /*
        策略配置
        */
        .strategyConfig(
            builder ->
                builder
                    /*
                    Entity 策略配置
                    */
                    .entityBuilder()

                    // 开启 lombok 模型
                    .enableLombok()

                    // 禁用生成 serialVersionUID
                    // .disableSerialVersionUID()

                    // 开启生成字段常量
                    // .enableColumnConstant()

                    // 开启链式模型
                    .enableChainModel()

                    // 设置父类
                    // .superClass(parentPath + ".common.model.BaseEntity")
                    .superClass(BaseEntity.class)

                    // 添加父类公共字段
                    // .addSuperEntityColumns("gmt_create", "gmt_modified")
                    .addSuperEntityColumns("create_time")

                    // 全局主键类型
                    .idType(IdType.ASSIGN_ID)
                    // .addTableFills(
                    //    new Column("gmt_create", FieldFill.INSERT),
                    //    new Column("gmt_modified", FieldFill.INSERT_UPDATE))
                    .addTableFills(new Column("create_time", FieldFill.INSERT))

                    // 开启 Boolean 类型字段移除 is 前缀
                    .enableRemoveIsPrefix()

                    // 乐观锁字段名(数据库)
                    // .versionColumnName("version")
                    // 乐观锁属性名(实体)
                    // .versionPropertyName("version")

                    // 逻辑删除字段名(数据库)
                    // .logicDeleteColumnName("is_deleted")
                    // 逻辑删除属性名(实体)
                    // .logicDeletePropertyName("deleteFlag")

                    // 开启生成实体时生成字段注解
                    .enableTableFieldAnnotation()
                    // 格式化文件名称
                    .formatFileName("%sEntity")

                    /*
                    Controller 策略配置
                    */
                    .controllerBuilder()
                    // 开启驼峰转连字符
                    .enableHyphenStyle()
                    // 开启生成@RestController 控制器
                    .enableRestStyle()

                    /*
                    Service 策略配置
                    */
                    .serviceBuilder()
                    // 格式化 service 接口文件名称
                    .formatServiceFileName("%sService"))
        .execute();
  }
}

@Component
public class CommonMetaObjectHandler implements MetaObjectHandler {

  @Override
  public void insertFill(MetaObject metaObject) {
    this.strictInsertFill(metaObject, "createTime", LocalDateTime::now, LocalDateTime.class);
    // this.strictInsertFill(metaObject, "gmtModified", LocalDateTime::now, LocalDateTime.class);
  }

  @Override
  public void updateFill(MetaObject metaObject) {
    // this.strictUpdateFill(metaObject, "gmtModified", LocalDateTime::now, LocalDateTime.class);
  }
}

@Configuration
@MapperScan("包名.mapper")
public class MybatisPlusConfig {

  /** 分页插件 */
  @Bean
  public MybatisPlusInterceptor mybatisPlusInterceptor() {
    MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
    interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
    interceptor.addInnerInterceptor(new BlockAttackInnerInterceptor());
    return interceptor;
  }
}

# application.yml
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:com/ex/bianque/mapper/xml/*.xml

@SpringBootTest
public class MyBatisPlusTest {

  @Autowired private RecordService recordService;

  @Test
  public void testSelect() {
    System.out.println(("----- MybatisPlus测试 ------"));
    List<XxxEntity> list = xxxdService.list(new QueryWrapper<XxxEntity>().last(" limit 1"));
    list.forEach(System.out::println);
  }
}