Hibernate学习：查询缓存 - c++编程基础

一：查询缓存的配置

(1)在Hibernate配置文件中打开查询缓存

true
注意：查询缓存是依赖二级缓存的，注意先打开二级缓存

(2)query.setCacheable(true)
List list = (List )session.createQuery("from User").setCacheable(true).list();
List list2 = (List )session.createQuery("from User").setCacheable(true).list();

二：单元测试

@org.junit.Test
	@SuppressWarnings({ "unused", "unchecked" })
	public  void  testQueryCahce(){
		Session session = factory.openSession();
		session.beginTransaction();
		List
  
    list  = (List
   
    )session.createQuery("from User").setCacheable(true).list(); List
    
      list2 = (List
     
      )session.createQuery("from User").setCacheable(true).list(); session.getTransaction().commit(); session.close(); }

输出结果：只输出一条sql语句，证明查询缓存起作用了！

Hibernate:
select
user0_.id as id0_,
user0_.group_id as group3_0_,
user0_.name as name0_
from
User user0_
afterClass