getSessionFactory().evictQueries(); //清除快取 

1.在hibernate中createQuery執行hql查詢的時候使用查詢快取：

1. getSession().createQuery(hql).setCacheable(true).setCacheRegion("user").list(); 

2.在hibernate中createSQLQuery執行sql時使用查詢快取：

1. getSession().createSQLQuery(sql).setResultTransformer(Transformers.aliasToBean(User.class)).setCacheable(true).setCacheRegion("user").list(); 

這樣會報錯，原因是That's because the aim of the second level cache is to (ultimately) cache entities that Hib knows about. I haven't verified this but I'm not surprised that caching sql query doesn't work as those are not (directly) translated by hibernate into entities.

解決方法：

It's solutioned adding column's types to the query, using the method "addScalar()"

like this：

1. getSession().createSQLQuery(sql).addScalar("id", IntegerType.INSTANCE) 
2. .addScalar("name",StringType.INSTANCE) 
3. .addScalar("age",IntegerType.INSTANCE).setResultTransformer(Transformers.aliasToBean(User.class)) 
4. .setCacheable(true).setCacheRegion("user").list();