鍦℉ibernate涓鐞嗘壒閲忔洿鏂板拰鎵歸噺鍒犻櫎
鍙戝竷鏃墮棿錛?007.08.03 06:06 鏉ユ簮錛氳禌榪綉 浣滆咃細dxaw
鎵歸噺鏇存柊鏄寚鍦ㄤ竴涓簨鍔′腑鏇存柊澶ф壒閲忔暟鎹紝鎵歸噺鍒犻櫎鏄寚鍦ㄤ竴涓簨鍔′腑鍒犻櫎澶ф壒閲忔暟鎹備互涓嬬▼搴忕洿鎺ラ氳繃Hibernate API鎵歸噺鏇存柊CUSTOMERS琛ㄤ腑騫撮緞澶т簬闆剁殑鎵鏈夎褰曠殑AGE瀛楁錛?
tx = session.beginTransaction();
Iterator customers=session.find("from Customer c where c.age>0").iterator();
while(customers.hasNext()){
Customer customer=(Customer)customers.next();
customer.setAge(customer.getAge()+1);
}
tx.commit();
session.close();
濡傛灉CUSTOMERS琛ㄤ腑鏈?涓囨潯騫撮緞澶т簬闆剁殑璁板綍錛岄偅涔圫ession鐨刦ind()鏂規硶浼氫竴涓嬪瓙鍔犺澆1涓囦釜Customer瀵硅薄鍒板唴瀛樸傚綋鎵цtx.commit()鏂規硶鏃訛紝浼氭竻鐞嗙紦瀛橈紝Hibernate鎵ц1涓囨潯鏇存柊CUSTOMERS琛ㄧ殑update璇彞錛?
update CUSTOMERS set AGE=? …. where ID=i;
update CUSTOMERS set AGE=? …. where ID=j;
……
update CUSTOMERS set AGE=? …. where ID=k;
浠ヤ笂鎵歸噺鏇存柊鏂瑰紡鏈変袱涓己鐐癸細
(1) 鍗犵敤澶ч噺鍐呭瓨錛屽繀欏繪妸1涓囦釜Customer瀵硅薄鍏堝姞杞藉埌鍐呭瓨錛岀劧鍚庝竴涓鏇存柊瀹冧滑銆?
(2) 鎵ц鐨剈pdate璇彞鐨勬暟鐩お澶氾紝姣忎釜update璇彞鍙兘鏇存柊涓涓狢ustomer瀵硅薄錛屽繀欏婚氳繃1涓囨潯update璇彞鎵嶈兘鏇存柊涓涓囦釜Customer瀵硅薄錛岄綣佺殑璁塊棶鏁版嵁搴擄紝浼氬ぇ澶ч檷浣庡簲鐢ㄧ殑鎬ц兘銆?
涓轟簡榪呴熼噴鏀?涓囦釜Customer瀵硅薄鍗犵敤鐨勫唴瀛橈紝鍙互鍦ㄦ洿鏂版瘡涓狢ustomer瀵硅薄鍚庯紝灝辮皟鐢⊿ession鐨別vict()鏂規硶绔嬪嵆閲婃斁瀹冪殑鍐呭瓨錛?
tx = session.beginTransaction();
Iterator customers=session.find("from Customer c where c.age>0").iterator();
while(customers.hasNext()){
Customer customer=(Customer)customers.next();
customer.setAge(customer.getAge()+1);
session.flush();
session.evict(customer);
}
tx.commit();
session.close();
鍦ㄤ互涓婄▼搴忎腑錛屼慨鏀逛簡涓涓狢ustomer瀵硅薄鐨刟ge灞炴у悗錛屽氨绔嬪嵆璋冪敤Session鐨?flush()鏂規硶鍜宔vict()鏂規硶錛宖lush()鏂規硶浣縃ibernate绔嬪埢鏍規嵁榪欎釜Customer瀵硅薄鐨勭姸鎬佸彉鍖栧悓姝ユ洿鏂版暟鎹簱錛屼粠鑰岀珛鍗蟲墽琛岀浉鍏崇殑update璇彞錛沞vict()鏂規硶鐢ㄤ簬鎶婅繖涓狢ustomer瀵硅薄浠庣紦瀛樹腑娓呴櫎鍑哄幓錛屼粠鑰屽強鏃墮噴鏀懼畠鍗犵敤鐨勫唴瀛樸?
浣唀vict()鏂規硶鍙兘紼嶅井鎻愰珮鎵歸噺鎿嶄綔鐨勬ц兘錛屽洜涓轟笉綆℃湁娌℃湁浣跨敤evict()鏂規硶錛孒ibernate閮藉繀欏繪墽琛?涓囨潯update璇彞錛屾墠鑳芥洿鏂?涓囦釜Customer瀵硅薄錛岃繖鏄獎鍝嶆壒閲忔搷浣滄ц兘鐨勯噸瑕佸洜绱犮傚亣濡侶ibernate鑳界洿鎺ユ墽琛屽涓婼QL璇彞錛?
update CUSTOMERS set AGE=AGE+1 where AGE>0;
閭ｄ箞浠ヤ笂涓鏉pdate璇彞灝辮兘鏇存柊CUSTOMERS琛ㄤ腑鐨?涓囨潯璁板綍銆備絾鏄疕ibernate騫舵病鏈夌洿鎺ユ彁渚涙墽琛岃繖縐島pdate璇彞鐨勬帴鍙ｃ傚簲鐢ㄧ▼搴忓繀欏葷粫榪嘓ibernate API錛岀洿鎺ラ氳繃JDBC API鏉ユ墽琛岃SQL璇彞錛?
tx = session.beginTransaction();
Connection con=session.connection();
PreparedStatement stmt=con.prepareStatement("update CUSTOMERS set AGE=AGE+1 "
+"where AGE>0 ");
stmt.executeUpdate();
tx.commit();
浠ヤ笂紼嬪簭婕旂ず浜嗙粫榪嘓ibernate API錛岀洿鎺ラ氳繃JDBC API璁塊棶鏁版嵁搴撶殑榪囩▼銆傚簲鐢ㄧ▼搴忛氳繃Session鐨刢onnection()鏂規硶鑾峰緱璇ession浣跨敤鐨勬暟鎹簱榪炴帴錛岀劧鍚庨氳繃瀹冨垱寤?PreparedStatement瀵硅薄騫舵墽琛孲QL璇彞銆傚煎緱娉ㄦ剰鐨勬槸錛屽簲鐢ㄧ▼搴忎粛鐒墮氳繃Hibernate鐨凾ransaction鎺ュ彛鏉ュ０鏄庝簨鍔¤竟鐣屻?
濡傛灉搴曞眰鏁版嵁搴擄紙濡侽racle錛夋敮鎸佸瓨鍌ㄨ繃紼嬶紝涔熷彲浠ラ氳繃瀛樺偍榪囩▼鏉ユ墽琛屾壒閲忔洿鏂般傚瓨鍌ㄨ繃紼嬬洿鎺ュ湪鏁版嵁搴撲腑榪愯錛岄熷害鏇村姞蹇傚湪Oracle鏁版嵁搴撲腑鍙互瀹氫箟涓涓悕涓篵atchUpdateCustomer()鐨勫瓨鍌ㄨ繃紼嬶紝浠ｇ爜濡備笅錛?
create or replace procedure batchUpdateCustomer(p_age in number) as
begin
update CUSTOMERS set AGE=AGE+1 where AGE>p_age;
end;
浠ヤ笂瀛樺偍榪囩▼鏈変竴涓弬鏁皃_age錛屼唬琛ㄥ鎴風殑騫撮緞錛屽簲鐢ㄧ▼搴忓彲鎸夌収浠ヤ笅鏂瑰紡璋冪敤瀛樺偍榪囩▼錛?
tx = session.beginTransaction();
Connection con=session.connection();
String procedure = "{call batchUpdateCustomer(?) }";
CallableStatement cstmt = con.prepareCall(procedure);
cstmt.setInt(1,0); //鎶婂勾榫勫弬鏁拌涓?
cstmt.executeUpdate();
tx.commit();
浠庝笂闈㈢▼搴忕湅鍑猴紝搴旂敤紼嬪簭涔熷繀欏葷粫榪嘓ibernate API錛岀洿鎺ラ氳繃JDBC API鏉ヨ皟鐢ㄥ瓨鍌ㄨ繃紼嬨?
Session鐨勫悇縐嶉噸杞藉艦寮忕殑update()鏂規硶閮戒竴嬈″彧鑳芥洿鏂頒竴涓璞★紝鑰宒elete()鏂規硶鐨勬湁浜涢噸杞藉艦寮忓厑璁鎬互HQL璇彞浣滀負鍙傛暟錛屼緥濡傦細
session.delete("from Customer c where c.age>0");
濡傛灉CUSTOMERS琛ㄤ腑鏈?涓囨潯騫撮緞澶т簬闆剁殑璁板綍錛岄偅涔堜互涓婁唬鐮佽兘鍒犻櫎涓涓囨潯璁板綍銆備絾鏄疭ession鐨刣elete()鏂規硶騫舵病鏈夋墽琛屼互涓媎elete璇彞錛?
delete from CUSTOMERS where AGE>0;
Session鐨刣elete()鏂規硶鍏堥氳繃浠ヤ笅select璇彞鎶?涓囦釜Customer瀵硅薄鍔犺澆鍒板唴瀛樹腑錛?
select * from CUSTOMERS where AGE>0;
鎺ヤ笅鏉ユ墽琛屼竴涓囨潯delete璇彞錛岄愪釜鍒犻櫎Customer瀵硅薄錛?
delete from CUSTOMERS where ID=i;
delete from CUSTOMERS where ID=j;
……
delete from CUSTOMERS where ID=k;
鐢辨鍙錛岀洿鎺ラ氳繃Hibernate API榪涜鎵歸噺鏇存柊鍜屾壒閲忓垹闄ら兘涓嶅煎緱鎺ㄨ崘銆傝岀洿鎺ラ氳繃JDBC API鎵ц鐩稿叧鐨凷QL璇彞鎴栬皟鐢ㄧ浉鍏崇殑瀛樺偍榪囩▼錛屾槸鎵歸噺鏇存柊鍜屾壒閲忓垹闄ょ殑鏈浣蟲柟寮忥紝榪欎袱縐嶆柟寮忛兘鏈変互涓嬩紭鐐癸細
(1) 鏃犻渶鎶婃暟鎹簱涓殑澶ф壒閲忔暟鎹厛鍔犺澆鍒板唴瀛樹腑錛岀劧鍚庨愪釜鏇存柊鎴栦慨鏀瑰畠浠紝鍥犳涓嶄細娑堣楀ぇ閲忓唴瀛樸?
(2) 鑳藉湪涓鏉QL璇彞涓洿鏂版垨鍒犻櫎澶ф壒閲忕殑鏁版嵁銆?
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