1.Hibernate Query Language 錛圚QL錛夛細
瀹冩槸ANSI SQL鐨勬渶灝廜O Dialect錛屼緥錛?/p>
| session.createQuery("from Category c where c.name like 'Laptop%'"); entityManager.createQuery("select c from Category c where c.name like 'Laptop%'"); |
2.Criteria query 錛?/strong>
瀹冩槸HQL鏌ヨ鐨勫歡浼革紝鎻愪緵浜嗕竴浜涢珮綰ф煡璇㈠姛鑳戒緥錛?/p>
| session.createCriteria(Category.class) .add( Restrictions.like("name", "Laptop%") ); |
3.Native SQL query :
| session.createSQLQuery( "select {c.*} from CATEGORY {c} where NAME like 'Laptop%'" ).addEntity("c", Category.class); |
鏈榪戯紝鎴戝湪欏圭洰涓粡甯擱亣鍒癏ibernate鏁版嵁鏌ヨ鐨勪換鍔★紝鎴戝涓浜涙垜閬囧埌鐨勮緝闅劇殑璇鵑涓句緥榪涜璇存槑錛?/p>
銆婅〃榪癝ELECT銆?/p>
| Criteria crit = session.createCriteria(User.class) .setProjection( Projections.projectionList() .add( Projections.property("lastname")) .add( Projections.property("firstname")) .list(); |
銆婅〃榪癢HERE銆?/p>
| Criteria crit = session.createCriteria(User.class) .add(Restrictions.eq("email", "foo@hibernate.org")) .uniqueResult(); |
銆婅〃榪癎ROUP銆?/p>
| Criteria crit = session.createCriteria(User.class) .setProjection( Projections.projectionList() .add( Projections.groupProperty("lastname")) .add( Projections.groupProperty("firstname")) .list() |
銆婅〃榪癘RDER銆?/p>
| Criteria crit = session.createCriteria(User.class) .addOrder( Order.asc("lastname") ) .addOrder( Order.asc("firstname") ) .list(); |
銆婂彇TOP 5緇撴灉銆嬶細
| Criteria crit = session.createCriteria(Cat.class); .setMaxResults(5) .list(); |
銆婂垎欏點嬶細
| Criteria crit = session.createCriteria(Cat.class) .setFirstResult(1) .setMaxResults(50) .list(); |
銆婂彇鏌ヨ緇撴灉銆嬶細
| 濡傛灉浣跨敤select鎴杇roup,蹇呴』浣跨敤object[]鏉ヨ幏寰楁煡璇㈢粨鏋淟ist鍊? 濡傛灉鏈嬌鐢╯elect鎴杇roup,蹇呴』浣跨敤java object[]鏉ヨ幏寰楁煡璇㈢粨鏋淟ist鍊? |
銆婃秹鍙婄粍鍚坧rimary key灞炴с嬶細
| Criteria crit = session.createCriteria(activitylog.class) .add( Restricts.eq(“comp_id.custId”,customerid0) ) .add( Restricts.ge(“createdTs”, starttime) ) .add( Restricts.le(“createdTs”, endtime ) ) .list(); |
銆奆oreign Key鑱斿悎鏌ヨ銆嬶細
| Criteria crit = session.createCriteria(activitylog.class) .createAlias( “taskCodeRf”, “tc” ) .setProjection( Projections.projectionList() .add( Projections.property("UserId")) .add( Projections.property("tc.taskdescription")) .list(); |
銆奛ative Query銆嬶細
| SQLQuery query = session.createSQLQuery(“select activitylog_seq.nextval as sessid from dual”); Query.addScalar(“sessid”,Hibernate.LONG); Long long0 = query.uniqueResult(); |
鏉ユ簮錛歨ttp://www.99java.com/article/34/200812/200812171145.html
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