濡傛灉鏄嬈℃墽琛屾鏂規硶錛孒ib浼氫粠鏁版嵁搴撳姞杞藉叧鑱旂殑order瀵硅薄錛屽惁鍒欏氨浠庣紦瀛樹腑寰楀埌銆?br />2'OID媯绱㈡柟寮忋傞氳繃session鐨刧et錛宭oad鏂規硶鐭ラ亾浜哋ID鐨勬儏鍐典笅鍙互浣跨敤
3'HQL媯绱㈡柟寮忋備嬌鐢ㄩ潰鍚戝璞＄殑HQL鏌ヨ璇彞session鐨刦ind鏂規硶鍒╃敤HQL鏉ユ煡璇?br />4'QBC媯绱㈡柟寮忋傚埄鐢≦BCAPI鏉ユ绱㈠畠鏄皝瑁呬簡鍩轟簬瀛楃涓茬殑鏌ヨ璇彞
5'鏈湴鐨凷QL媯绱㈡柟寮忋備嬌鐢ㄦ湰鍦版暟鎹簱鐨凷QL鏌ヨ璇彞Hib浼氳礋璐ｆ妸媯绱㈠埌鐨凧DBC緇撴灉闆嗘槧灝勪負鎸佷箙鍖栧璞″浘銆?br />
浜旂媯绱㈡柟寮忕殑浣跨敤鍦哄悎鍜岀壒鐐癸細
HQL聽錛毬犳槸闈㈠悜瀵硅薄鐨勬煡璇㈣璦錛屽悓SQL鏈変簺鐩鎬技鏄疕ib涓渶甯哥敤鐨勬柟寮忋?br />聽聽聽聽聽聽聽鏌ヨ璁懼畾鍚勭鏌ヨ鏉′歡銆?br />聽聽聽聽聽聽聽鏀寔鎶曞獎鏌ヨ錛屾绱㈠嚭瀵硅薄鐨勯儴鍒嗗睘鎬с?br />聽聽聽聽聽聽聽鏀寔鍒嗛〉鏌ヨ錛屽厑璁鎬嬌鐢╤aving鍜実roup聽by
聽聽聽聽聽聽聽鎻愪緵鍐呭埗鐨勮仛闆嗗嚱鏁幫紝sum()錛宮in()錛宮ax()
聽聽聽聽聽聽聽鑳借皟鐢ㄧ敤鎴風殑鑷畾涔塖QL
聽聽聽聽聽聽聽鏀寔瀛愭煡璇紝宓屽叆寮忔煡璇?br />聽聽聽聽聽聽聽鏀寔鍔ㄦ佺粦瀹氬弬鏁?br />寤鴻浣跨敤Query鎺ュ彛鏇挎崲session鐨刦ind鏂規硶銆?br />聽聽聽Query聽Q聽=聽session.createQuery("from聽customer聽as聽c聽where聽c.name聽=聽:customerName"聽+聽"and聽c.age聽=聽:customerAge");
聽聽聽query.setString聽("customerName"聽,聽"tom");
聽聽聽query.setInteger("customerAge"聽,聽"21");
聽聽聽list聽result聽=聽query.list();
QBC聽:聽聽QBCAPI鎻愪緵浜嗗彟涓縐嶆柟寮忥紝涓昏鏄疌riteria鎺ュ彛銆丆riterion鎺ュ彛鍜孍xpression綾?br />聽聽聽Criteria聽criteria聽=聽session.createCriteria(customer.class);
聽聽聽Criterion聽criterion1聽=聽Expression.like("name","t%");
聽聽聽Criterion聽criterion2聽=聽Expression.eq("age",new聽Integer(21));
聽聽聽Critera聽=聽criteria.add(criterion1)聽;
聽聽聽Critera聽=聽criteria.add(criterion2)聽;
聽聽聽list聽result聽=聽criteria.list();聽
聽聽聽鎴栨槸錛毬爈ist聽result聽=聽session.createCriteria(Customer.class).add(Expression.eq("this.name","tom")).list();聽
SQL聽:聽聽閲囩敤HQL鍜孮BC媯绱㈡椂錛孒ib鐢熸垚SQL璇彞閫傜敤鎵鏈夋暟鎹簱銆?br />聽聽聽Query聽query聽聽=聽session.createSQLQuery("select聽{c.*}聽from聽customers聽c聽where聽c.name聽like聽:聽customername聽"聽+聽"and聽c.age聽=聽:customerage","c",customer.calss);
聽聽聽query.setString("customername","tom");
聽聽聽query.setInteger("customerage","21");
聽聽聽list聽result聽=聽query.list();
/////////////澶氭佹煡璇?br />聽聽聽HQL聽錛歴ession.createQuery("from聽employee");
聽聽聽QBC聽錛歴ession.createCriteria(employee.class);
聽聽聽HQL聽:聽session.createQuery("from聽hourlyEmployee");
聽聽聽QBC聽:聽session.createCriteria(hourlyEmployee.class);
聽聽聽涓嬮潰鐨凥QL鏌ヨ璇彞灝嗘绱㈠嚭鎵鏈夌殑鎸佷箙鍖栧璞★細
聽聽聽from聽java.lang.Object聽;
聽聽聽from聽java.io.serializable聽;
////////////鏌ヨ鐨勬帓搴?br />聽聽聽1'鏌ヨ緇撴灉鎸夌収瀹㈡埛濮撳悕鍗囧簭鎺掑垪錛?br />聽聽聽HQL聽錛?br />聽聽聽聽聽聽聽聽Query聽query聽=聽session.createQuery聽("from聽customer聽c聽order聽by聽c.name");
聽聽聽QBC聽錛?br />聽聽聽聽聽聽聽聽Criteria聽criteria聽=聽session.createCriteria(customer.class);
聽聽聽聽聽聽聽聽criteria.addOrder(order.asc("name"));
聽聽聽HQL聽:
聽聽聽聽聽聽聽聽Query聽query聽=聽session.createQuery聽("from聽customer聽c聽order聽by聽c.name聽asc聽,聽c.age聽desc");
聽聽聽QBC聽:
聽聽聽聽聽聽聽聽Criteria聽criteria聽=聽session.createCriteria(customer.class);
聽聽聽聽聽聽聽聽criteria.addOrder(order.asc聽("name"));
聽聽聽聽聽聽聽聽criteria.addOrder(order.desc("age"));聽
聽聽聽聽聽聽聽聽import聽net.sf.hibernate.pression.Order
聽聽聽聽聽聽聽聽import聽mypack.Order
聽聽聽聽聽聽聽聽...........
聽聽聽聽聽聽聽聽Criteria聽criteria聽=聽session.createCritria聽(mypack.Order.class);
聽聽聽聽聽聽聽聽criteria.addOrder(net.sf.hibernate.Order.asc("name"));
///////////HQL璇彞鐨勫弬鏁扮粦瀹歈uery鎺ュ彛鎻愪緵浜嗙粦瀹氬悇縐岺ib鏄犲皠綾誨瀷鐨勬柟娉曘?br />聽聽聽聽聽聽聽聽setBinary()
聽聽聽聽聽聽聽聽setString()
聽聽聽聽聽聽聽聽setBoolean()
聽聽聽聽聽聽聽聽setByte()
聽聽聽聽聽聽聽聽setCalendar()
聽聽聽聽聽聽聽聽setCharacter()
聽聽聽聽聽聽聽聽setDate()
聽聽聽聽聽聽聽聽setDouble()
聽聽聽聽聽聽聽聽setText()
聽聽聽聽聽聽聽聽setTime()
聽聽聽聽聽聽聽聽setTimestamp()
聽聽聽聽聽聽聽聽setEntity()//鎶婂弬鏁頒笌涓涓寔涔呭寲綾葷殑浜嬩緥緇戝畾lsit聽result聽=聽session.createQuery("from聽order聽o聽where聽o.customer聽=聽聽聽聽聽聽聽聽聽聽聽聽:customer").setEntity("customer"聽,聽customer).list聽;
聽聽聽聽聽聽聽聽setParameter()//緇戝畾浠繪剰綾誨瀷鐨勫弬鏁?br />聽聽聽聽聽聽聽聽setProperties()//鎶婂懡鍚嶅弬鏁頒笌涓涓璞＄殑灞炴у肩粦瀹毬燪uery聽query聽=聽session.createQuery("from聽customer聽c聽where聽c.name聽=:聽聽聽聽聽name聽"聽+聽"and聽c.age聽=:age"聽);
聽聽聽聽聽聽聽聽Query.setProperties(customer);聽
榪囨護鏌ヨ緇撴灉涓殑閲嶅鍏冪礌聽 聽聽聽聽聽浣跨敤Set闆嗗悎鏉ュ幓闄ら噸澶嶅厓绱狅紱鎴栨槸浣跨敤distinct鍏冪礌 聽聽聽聽聽Iterator聽iterator聽=聽session.createQuery("select聽distinct聽c.name聽from聽customer聽").list().iterator(); 聽聽聽聽聽while(iterator.hasnext()){ 聽聽聽聽聽聽聽聽聽聽聽String聽name聽=聽(String)聽it.next()聽; 聽聽聽聽聽} ///////////浣跨敤鑱氶泦鍑芥暟 count();聽璁板綍鐨勬潯鏁?br />min();聽聽聽姹傛渶灝忓?br />max();聽聽聽姹傛渶澶у?br />avg();聽聽聽姹傚鉤鍧囧?br />sum();聽聽聽姹傚拰 1'鏌ヨcustomer涓殑鎵鏈夎褰曟潯鏁?br />聽聽聽integer聽i聽=聽(Integer)聽session.createQuery("select聽count(*)聽from聽customer").uniqueResult(); 鍙湁鍦ㄧ‘瀹氬彧鏈変竴涓璞℃椂鍊欎嬌鐢╱niqueResult(); 2'鏌ヨcustomer涓殑鎵鏈夊鎴風殑騫沖潎騫撮緞 聽聽聽integer聽i聽=聽(Integer)聽session.createQuery("select聽avg(c.age)聽from聽customer聽c聽").uniqueResult(); 3'鏌ヨcustomer涓殑瀹㈡埛騫撮緞鐨勬渶澶у箋佹渶灝忓?br />涓涓暟緇勫彲浠ョ湅浣滀竴涓璞?br />聽聽聽object聽[]聽i聽=聽(Integer)聽session.createQuery("select聽max(c.age),min(c.age)聽from聽customer聽c聽").uniqueResult(); 聽聽聽Integer聽Maxage聽=聽(Integer)聽i聽[0]; 聽聽聽Integer聽Minage聽=聽(Integer)聽i聽[1]; 4'緇熻customer涓殑瀹㈡埛鐨勫悕縐版暟鐩紝蹇界暐閲嶅鐨勫鍚?br />聽聽聽Integer聽cout聽=聽(Integer)聽session.createQuery("select聽count(distinct聽c.name)聽from聽customer聽c").uniqueResult(); ////////////浣跨敤鍒嗙粍鏌ヨ 1'鎸夊鍚嶅垎緇勶紝緇熻customer涓殑鐩稿悓濮撳悕鐨勮褰曟暟鐩?br />聽聽聽Iterator聽iterator聽=聽(Integer)聽session.createQuery("select聽c.name聽,count(c)聽from聽customer聽c聽group聽by聽c.name").list.iterator(); 聽聽聽while(iterator.hasnext()){ 聽聽聽聽聽聽聽聽聽object[]聽p聽=聽(objcet[])iterator.next(); 聽聽聽聽聽聽聽聽聽String聽name聽=聽p[0]; 聽聽聽聽聽聽聽聽聽Integer聽cout聽=聽p[1]; 聽聽聽} 2'鎸夊鎴峰垎緇勶紝緇熻姣忎釜瀹㈡埛鐨勮鍗曟暟閲?br />聽聽聽Iterator聽iterator聽=聽session.crateQuery("select聽c.id聽,c.name聽,聽count(o)聽from聽customer聽c聽join聽c.order聽o聽group聽by聽c.id聽").list().iterator; 聽聽聽while(iterator.hasnext()){ 聽聽聽聽聽聽聽聽聽object[]聽p聽=聽(objcet[])iterator.next(); 聽聽聽聽聽聽聽聽聽Integer聽id聽=聽p[0] 聽聽聽聽聽聽聽聽聽String聽name聽=聽p[1]; 聽聽聽聽聽聽聽聽聽Integer聽cout聽=聽p[2]; 聽聽聽} 3'緇熻姣忎釜瀹㈡埛鐨勮鍗曟諱環 聽聽聽Iterator聽iterator聽=聽session.crateQuery("select聽c.id聽,c.name,sum(o.price)聽from聽customer聽c聽join聽c.order聽o聽group聽by聽c.id").list.iterator(); 聽聽聽while(iterator.hasnext()){ 聽聽聽聽聽聽聽聽聽object[]聽p聽=聽(objcet[])iterator.next(); 聽聽聽聽聽聽聽聽聽Integer聽id聽=聽p[0] 聽聽聽聽聽聽聽聽聽String聽name聽=聽p[1]; 聽聽聽聽聽聽聽聽聽Double聽cout聽=聽p[2]; 聽聽聽} //////////鎶ヨ〃鐨勪紭鍖?br />浣跨敤HQL鏃跺鏋滃彧鏌ヨ瀵硅薄鐨勪竴閮ㄥ垎灞炴т笉浼氳繑鍥炴寔涔呭寲瀵硅薄 from聽customer聽c聽join聽c.order聽o聽group聽by聽c.age;//榪斿洖鎸佷箙鍖栧璞★紝鍗犵敤緙撳瓨銆?br /> select聽c.id聽,聽c.name聽,聽c.age聽,o.id聽,o.price聽from聽customer聽c聽join聽c.order聽o聽group聽by聽c.age聽//榪斿洖鍏崇郴鎬ф暟鎹紝涓嶅崰鐢╯ession鐨勭紦瀛橈紝鍙互涓篔VM鍥炴敹 /////////HQL瀛愭煡璇㈢殑闆嗗悎鍑芥暟灞炴?br />size()聽榪斿洖闆嗗悎涓厓绱犵殑鏁扮洰 minIndex()聽寤虹珛绱㈠紩鐨勯泦鍚堣幏寰楁渶灝忕殑绱㈠紩 maxIndex()聽寤虹珛绱㈠紩鐨勯泦鍚堣幏寰楁渶澶х殑绱㈠紩 minElement()聽瀵逛簬鍖呭惈鍩烘湰鍏冪礌鐨勯泦鍚堣幏寰楅泦鍚堟渶灝忕殑鍏冪礌 maxElement()聽瀵逛簬鍖呭惈鍩烘湰鍏冪礌鐨勯泦鍚堣幏寰楅泦鍚堟渶澶х殑鍏冪礌 element()聽鑾峰緱闆嗗悎涓殑鎵鏈夊厓绱?br />///////////Hibernate鐨勭紦瀛樼鐞?br />綆＄悊涓綰х紦瀛橈紝涓嶅緩璁嬌鐢ㄤ笅鍒楁柟娉曟潵綆＄悊涓綰х紦瀛?br />evict(Object聽o)浠庣紦瀛樹腑娓呴櫎鍙傛暟鎸囧畾鐨勬寔涔呭寲瀵硅薄 clear()娓呯┖緙撳瓨涓墍鏈夌殑鎸佷箙鍖栧璞?br />///////////鎵歸噺鏇存柊鍜屾壒閲忓垹闄?br />鎵歸噺鏇存柊customer琛ㄤ腑鐨勫勾榫勫ぇ浜庨浂鐨勬墍鏈夎褰曠殑AGE瀛楁錛?br />聽聽聽聽tx聽=聽session.beginTransaction(); 聽聽聽聽Iterator聽customer聽=聽session.find("from聽customer聽c聽where聽c.age聽>聽0").iterator(); 聽聽聽聽while(iterator.hasnext()){ 聽聽聽聽聽聽聽聽customer聽customer聽=聽(customer)聽customer.next(); 聽聽聽聽聽聽聽聽customer.setAge(customer.getAge()+1); 聽聽聽聽} 聽聽聽聽tx.commit(); 聽聽聽聽session.close();//涓婅堪浠ｇ爜瀵規暟鎹簱鎿嶄綔鏁堟灉涓嶅ソ鍙互浣跨敤涓嬪垪鐨凧DBCAPI鐩磋繛 聽聽聽 聽聽聽聽tx聽=聽session.beginTranscation(); 聽聽聽聽Connection聽conn聽=聽session.connection(); 聽聽聽聽Preparedstatement聽ps聽=聽conn.preparedstatment("update聽customer聽set聽age聽=聽age聽+聽1聽where聽age聽>聽0聽"); 聽聽聽聽ps.executeupdate(); 聽聽聽聽tx.commit(); |
Dragonofson 2006-06-19 14:56 鍙戣〃璇勮
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