The difference between HQL query and criteria query in Hibernate framework

The Hibernate framework provides HQL queries and criteria queries. Here is an example of these two queries. There is a general understanding of these two query methods. Use the Housing Information table as an example to check all housing information.

HQL Statement Query all housing information:

/** Check All houses * * (non-javadoc) * @see dao.housedao#selecthouse ()*/     PublicListSelecthouse () {//TODO auto-generated Method Stub//Get ConnectionsSession session =hibernateutil.getsession (); //Query Housing entity classString hql= "from house"; Query q=cr=session.createquery (HQL); List List=cr.list (); returnlist; }

The Criteria statement queries all housing information:

 /*   * query All houses * * (non-javadoc) * @see Dao.housedao#selecthouse ()  */ public  list Selecthouse () { // TODO auto-generated Method stub  Session session = Hibernateutil.getsession ();  //  Create criteria  criteria cr= Session.createcriteria (House.                         Class  );          List List  = Cr.list ();           return   list; }

By comparing the two, we can see:

1. TheHQL statement must write the corresponding HQL query statement, and the Criteria statement puts the entity class object directly into the class, omitting the query statement.

2,HQL query, must have a certain foundation of SQL . The Criteria query does not require any SQL Foundation.

3,HQL query than Criteria query with a broader scope, we recommend the use of HQL query. But you should also be aware of the Criteria query.

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The difference between HQL query and criteria query in Hibernate framework