Hibernate learning: querying Cache

Hibernate learning: querying Cache

I. query cache configurations

(1) Open the query cache in the Hibernate configuration file

True
Note: The query cache depends on the second-level cache. Enable the second-level cache first.


(2) query. setCacheable (true)
List List = (List ) Session. createQuery ("from User"). setCacheable (true). list ();
List List2 = (List ) Session. createQuery ("from User"). setCacheable (true). list ();

Ii. Unit Test

@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();}
    
   
  
 

Output result: Only one SQL statement is output, proving that the query cache has taken effect!

Hibernate:
Select
User0 _. id as id0 _,
User0 _. group_id as group3_0 _,
User0 _. name as name0 _
From
User user0 _
AfterClass