如何在jpa中实现自动增量

Question

I am about learning JPA, and I want to know how can we tel the entity manager that the primary key field is generated using the database auto increment to the table? I am using Mysql 5.5 and Oracle Enterprise For Eclipse(OEFE) thanks for help

Answer 1

If you have aa id which needs to be auto incremented then ,

@Id @GeneratedValue(strategy=GenerationType.IDENTITY)
private Long id;