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1、MySQL主键生成方式小结一、使用native（自然）生成方式♦配置如F：@Id©GeneratedValue(generator=H_nativeu)@GenericGenerator(name=T,_nativenrstrategy="native11)SColumn(name=T,uuidn)publicLonggetld(){returnid;♦效果如下:hysql>select*fromtab_users；iuser_id!user_nane!1icareers!2icareers02!2rowsinset<0.00sec>二、使用uuid生成方式♦配置如下：
2、@Id©GeneratedValue(generator=rf_uuid,1)©GenericGenerator(name=n_uuidnrstrategy="uuid")©Column(name=f,user_idf,)publicStringgetld(){returnid;♦效果如下:mysql>select*fromtab_users；iuser_id!user_nane!!8a8a0ffb27flbb540127flbb56bc0001!careers!!8a8a0ffb27flbb540127flbb56cc0002!careers02!2rowsinset
3、<0.01sec>三、使用hilo（高低值）生成方式♦配置如下：@Id©GeneratedValue(generator=n_hilof,)QGenericGenerator(name=n_hilonfstrategy=nhilofl)©Column(name=nuser_idf,)publicLonggetld(){returnid;}♦效果如下：
4、ni;sql>select*fromtab_users；iuser_idiuser_namei1icareersi2icareers02i12rowsinset<0.00sec>四、使用assigned（手工指定）生成方式
5、♦配置如下：@Id@GeneratedValue(generator=n_assignedf,)@GenericGenerator(name=If_assigneduzstrategy="assigned")@Colunm(name="useridTI)publicLonggetld(){returnid;}♦效果如下nysql>select*trontah_users；++—+iuser_id!user_nanei■++—+■10011careersi■■10021careers02i■++—+2rowsinset<0.00sec>
6、五、使用identity牛:成方式
7、♦注解如F：@Id@GeneratedValue(generator=fl_identityff)SGenericGenerator(name=If_identityT,fstrategy="identity")QColunm(name="userid11)publicLonggetId(){returnid;}♦效果如下:mysql>select*fromtab_users；+++■user_id■user_nane■+++!1!careers!■2Icareers02!+++2rowsinset<0.00sec>六、使用sequence(序列)牛.成方式♦注解如F：
8、@Id@GeneratedValue(generator=,f_sequencen)@GenericGenerator(name=fl_sequenceTI,strategy=T,sequenceT,)@Column(name=f,user_id,f)publicLonggetld(){returnid;}♦效果如下：注：MySQL不支持序列主键七、使用increment(自增长方式)♦注解如下：@Id@GeneratedValue(generator=n_increment,f)@GenericGenerator(name=r,_incrementf,rstrateg
9、y=nincrementn)©Column(name=ffuser_idf,)publicLonggetld(){returnid;♦效杲如下:八、使用guid生成方式♦注解如下：@Id@GeneratedValue(generator=n_guidn)@GenericGenerator(name=f,_guidr,,strategy="guid")@Colunm(name=f,user_idf,)publicStringgetld(){returnid;}hysql>select*fromtab_users；iuser_idiuser_
