java - Hibernate 锁定项目的数组列表

Question

List <Student> st = session.createQuery ("select ids from students where a = :a")
                        .setString("a", value)
                        .list();

//Errors out saying that ArrayList is an unknown entity
session.lock(st, LockMode.UPGRADE); 

Students本身扩展了Serializable。如何在 Hibernate 中锁定序列化数组列表？

Answer 1

您需要旋转列表并逐个锁定实体。

for(Student s : st) {
  session.lock(s, LockMode.UPGRADE);
}

注:Session#lock(java.lang.Object, org.hibernate.LockMode)已弃用，取而代之的是 session.buildLockRequest(LockMode.UPGRADE).lock(student)

更新: 您还可以通过 Query.setLockMode(java.lang.String, org.hibernate.LockMode) 直接锁定查询.