GenericHibernateDAO的方法findById中的“锁定”布尔值是什么意思？

Question

I am using hibernate. When i have to find a specific entity, i want to use the findById(Long id, boolean lock)

method. What value should i give to lock?

Answer 1

The API for the method is here . You should put true if you want no chance of the value changing while you are getting it from the database.

Answer 2

There are several overloaded findById. You should choose one depending on the locking strategy you are using.

I suggest read about optimist and pessimist locking.