数据库引擎从是myISAM修改为innnodb方法 https://blog.csdn.net/tianyaleixiaowu/article/details/79468277

设置id递增 https://blog.csdn.net/a425310161/article/details/82292156

mysql> show create table girl\G

*************************** 1. row ***************************

       Table: girl

Create Table: CREATE TABLE `girl` (

  `id` int(11) NOT NULL,

  `age` int(11) DEFAULT NULL,

  `cup_size` varchar(255) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=MyISAM DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

同问，id没有自增，且引擎不对

需要加这几个注解吧

@Id

@GenericGenerator(name = "generator", strategy = "increment")

@GeneratedValue(generator = "generator")