Hibernate的MYSQL序列有关问题

Hibernate的MYSQL序列问题
1.mysql的主键是自动增加的increment。
2.生成entity.java的时候选择org.hibernate.increment.
3.java代码：

// Property accessors@GenericGenerator(name = "generator", strategy = "increment")@Id@GeneratedValue(generator = "generator")@Column(name = "userId", unique = true, nullable = false)public Integer getUserId() {return this.userId;}