鍘熸枃鍑鴻嚜 http://blog.csdn.net/woshichenxu/archive/2006/01/22/586361.aspx
1. 鍏充簬hibernate緙? 瀛樼殑闂錛?/font>
1.1.1. 鍩烘湰鐨勭紦瀛樺師鐞?/font>
Hibernate緙撳瓨鍒嗕負浜岀駭錛岀涓綰у瓨鏀句簬session涓О涓轟竴綰х紦瀛橈紝榛樿甯︽湁涓斾笉鑳藉嵏杞姐?/span>
絎簩綰ф槸鐢?/span>sessionFactory鎺у埗鐨勮繘紼嬬駭緙撳瓨銆傛槸鍏ㄥ眬鍏變韓鐨勭紦瀛橈紝鍑℃槸浼氳皟鐢ㄤ簩綰х紦瀛樼殑鏌? 璇㈡柟娉?/span>閮戒細浠庝腑鍙楃泭銆傚彧鏈夌粡姝ｇ‘鐨勯厤緗悗浜岀駭緙撳瓨鎵嶄細鍙戞尌浣滅敤銆傚悓鏃? 鍦ㄨ繘琛屾潯浠舵煡璇㈡椂蹇呴』浣跨敤鐩稿簲鐨勬柟娉曟墠鑳戒粠緙撳瓨涓幏鍙栨暟鎹傛瘮濡?/span>Query.iterate()鏂規硶銆?/span>load銆?/span>get鏂規硶絳夈傚繀欏繪敞鎰忕殑鏄?/span>session.find鏂規硶姘歌繙鏄粠鏁版嵁搴撲腑鑾峰彇鏁版嵁錛屼笉浼氫粠浜岀駭緙撳瓨涓幏鍙栨暟鎹紝鍗? 渚垮叾涓湁鍏舵墍闇瑕佺殑鏁版嵁涔熸槸濡傛銆?/span>
鏌ヨ鏃朵嬌鐢ㄧ紦瀛樼殑瀹炵幇榪囩▼涓猴細棣栧厛鏌ヨ涓綰х紦瀛樹腑鏄惁鍏鋒湁闇瑕? 鐨勬暟鎹紝濡傛灉娌℃湁錛屾煡璇簩綰х紦瀛橈紝濡傛灉浜岀駭緙撳瓨涓篃娌℃湁錛屾鏃跺啀鎵ц鏌ヨ鏁版嵁搴撶殑宸ヤ綔銆傝娉ㄦ剰鐨勬槸錛氭3縐嶆柟寮忕殑鏌ヨ閫熷害鏄緷嬈￠檷浣庣殑銆?/span>
1.2. 瀛樺湪鐨勯棶棰?/span>
1.2.1. 涓綰х紦瀛樼殑闂浠ュ強浣跨敤浜岀駭緙撳瓨 鐨勫師鍥?/font>
鍥犱負Session鐨勭敓鍛芥湡寰寰寰堢煭錛屽瓨鍦ㄤ簬Session鍐呴儴鐨勭涓綰ф渶蹇紦瀛樼殑鐢熷懡鏈熷綋鐒朵篃寰堢煭錛?span style="color: blue;">鎵浠ョ涓綰х紦瀛樼殑鍛戒腑鐜囨槸寰堜綆鐨?/span>銆傚叾瀵圭郴緇熸ц兘鐨勬敼鍠勪篃鏄緢鏈夐檺鐨勩傚綋鐒訛紝榪欎釜Session鍐呴儴緙撳瓨鐨勪富瑕佷綔鐢ㄦ槸淇濇寔Session鍐呴儴鏁版嵁鐘舵佸悓姝ャ傚茍闈炴槸hibernate涓轟簡澶у箙鎻愰珮緋葷粺鎬ц兘鎵鎻愪緵鐨勩?/span>
涓轟簡鎻愰珮浣跨敤hibernate鐨勬ц兘錛岄櫎浜嗗父瑙勭殑涓浜涢渶瑕佹敞鎰忕殑鏂規硶姣斿錛?/span>
浣跨敤寤惰繜鍔犺澆銆佽揩鍒囧榪炴帴銆佹煡璇㈣繃婊ょ瓑浠ュ錛岃繕闇瑕侀厤緗?/span>hibernate鐨勪簩綰х紦瀛樸傚叾瀵圭郴緇熸暣浣撴ц兘鐨勬敼鍠勫線寰鍏鋒湁绔嬬瑙佸獎鐨勬晥鏋滐紒
錛堢粡榪囪嚜宸變互鍓嶄綔欏圭洰鐨勭粡楠岋紝涓鑸細鏈?/span>3~4鍊嶇殑鎬ц兘鎻愰珮錛?/span>
1.2.2. N+1嬈? 鏌ヨ鐨勯棶棰?/font>
鎵ц鏉′歡鏌ヨ鏃訛紝iterate錛堬級鏂規硶鍏鋒湁钁楀悕鐨?/span>“n+1”嬈℃煡璇㈢殑闂錛屼篃灝辨槸璇村湪絎竴 嬈℃煡璇㈡椂iterate鏂規硶浼氭墽琛屾弧瓚蟲潯浠剁殑鏌ヨ緇撴灉鏁板啀鍔犱竴嬈★紙n+1錛夌殑鏌ヨ銆備絾鏄闂鍙瓨鍦ㄤ簬絎竴嬈℃煡璇㈡椂錛屽湪鍚庨潰鎵ц鐩稿悓鏌? 璇㈡椂鎬ц兘浼氬緱鍒版瀬澶х殑鏀瑰杽銆傛鏂規硶閫傚悎浜庢煡璇㈡暟鎹噺杈冨ぇ鐨勪笟鍔℃暟鎹?/span>
浣嗘槸娉ㄦ剰錛氬綋鏁版嵁閲忕壒鍒ぇ鏃訛紙姣斿嫻佹按綰挎暟鎹瓑錛夐渶瑕侀拡瀵規鎸? 涔呭寲瀵硅薄閰嶇疆鍏跺叿浣撶殑緙撳瓨絳栫暐錛屾瘮濡傝緗叾瀛樺湪浜庣紦瀛樹腑鐨勬渶澶ц褰曟暟銆佺紦瀛樺瓨鍦ㄧ殑鏃墮棿絳夊弬鏁幫紝浠ラ伩 鍏嶇郴緇熷皢澶ч噺鐨勬暟鎹悓鏃惰杞藉叆鍐呭瓨涓紩璧峰唴瀛樿祫婧愮殑榪呴熻楀敖錛屽弽鑰岄檷浣庣郴緇熺殑鎬ц兘錛侊紒錛?/span>
1.3. 浣跨敤hibernate浜岀駭緙撳瓨鐨勫叾浠栨敞鎰? 浜嬮」錛?/font>
1.3.1. 鍏充簬鏁版嵁鐨勬湁鏁堟?/font>
鍙﹀錛?/span>hibernate浼氳嚜琛岀淮鎶や簩綰х紦瀛樹腑鐨勬暟鎹紝浠ヤ繚璇佺紦瀛樹腑鐨勬暟鎹拰鏁版嵁搴撲腑鐨勭湡瀹炴暟鎹殑涓鑷存э紒鏃犺浣曟椂錛屽綋浣犺皟鐢?/span>save()銆?/span>update()鎴?/span> saveOrUpdate()鏂規硶浼犻掍竴涓璞℃椂錛屾垨浣跨敤load()銆?/span> get()銆?/span>list()銆?/span>iterate() 鎴?/span>scroll()鏂規硶鑾峰緱涓涓璞℃椂, 璇ュ璞￠兘灝嗚鍔犲叆鍒?/span>Session鐨勫唴閮ㄧ紦瀛樹腑銆?/span> 褰撻殢鍚?/span>flush()鏂規硶琚皟鐢ㄦ椂錛屽璞＄殑鐘舵佷細鍜屾暟鎹簱鍙栧緱鍚屾銆?/span>
涔熷氨鏄鍒犻櫎銆佹洿鏂般佸鍔犳暟鎹殑鏃跺欙紝鍚屾椂鏇存柊緙撳瓨銆傚綋鐒惰繖涔? 鍖呮嫭浜岀駭緙撳瓨錛?/span>
鍙鏄皟鐢?/span>hibernate API鎵ц鏁版嵁搴撶浉鍏崇殑宸ヤ綔銆?/span>hibernate閮戒細涓轟綘鑷姩淇濊瘉緙撳瓨鏁版嵁鐨勬湁鏁堟э紒錛?/span>
浣嗘槸錛屽鏋滀綘浣跨敤浜?/span>JDBC緇曡繃hibernate鐩存帴鎵ц瀵規暟鎹簱鐨勬搷浣溿傛鏃訛紝Hibernate涓嶄細/涔熶笉鍙兘鑷鎰熺煡鍒版暟鎹簱琚繘琛岀殑鍙樺寲鏀瑰姩錛屼篃灝變笉鑳藉啀淇濊瘉緙? 瀛樹腑鏁版嵁鐨勬湁鏁堟э紒錛?/span>
榪欎篃鏄墍鏈夌殑ORM浜у搧鍏卞悓鍏鋒湁鐨勯棶棰樸傚垢榪愮殑鏄紝Hibernate涓烘垜浠毚闇蹭簡Cache鐨勬竻闄ゆ柟娉曪紝榪欑粰鎴戜滑鎻愪緵浜嗕竴涓墜鍔ㄤ繚璇佹暟鎹湁鏁堟х殑鏈轟細錛侊紒
涓綰х紦瀛橈紝浜岀駭緙撳瓨閮芥湁鐩稿簲鐨勬竻闄ゆ柟娉曘?/span>
鍏朵腑浜岀駭緙撳瓨鎻愪緵鐨勬竻闄ゆ柟娉曚負錛?/span>
鎸夊璞?/span>class娓呯┖緙撳瓨
鎸夊璞?/span>class鍜屽璞＄殑涓婚敭id娓呯┖緙撳瓨
娓呯┖瀵硅薄鐨勯泦鍚堜腑鐨勭紦瀛樻暟鎹瓑銆?/span>
1.3.2. 閫傚悎浣跨敤鐨勬儏鍐?/font>
騫墮潪鎵鏈夌殑鎯呭喌閮介傚悎浜庝嬌鐢ㄤ簩綰х紦瀛橈紝闇瑕佹牴鎹叿浣撴儏鍐墊潵鍐? 瀹氥傚悓鏃跺彲浠ラ拡瀵規煇涓涓寔涔呭寲瀵硅薄閰嶇疆鍏跺叿浣撶殑緙撳瓨絳栫暐銆?/span>
閫傚悎浜庝嬌鐢ㄤ簩綰х紦瀛樼殑鎯呭喌錛?/span>
1銆?/font>鏁版嵁涓嶄細琚涓夋柟淇敼錛?/span>
涓鑸儏鍐典笅錛屼細琚?/span>hibernate浠ュ淇敼鐨勬暟鎹渶濂戒笉瑕侀厤緗簩綰х紦瀛橈紝浠ュ厤寮曡搗涓嶄竴鑷寸殑鏁版嵁銆? 浣嗘槸濡傛灉姝ゆ暟鎹洜涓烘ц兘鐨勫師鍥犻渶瑕佽緙撳瓨錛屽悓鏃跺張鏈夊彲鑳借絎?/span>3鏂規瘮濡?/span>SQL淇敼錛屼篃鍙互涓哄叾閰嶇疆浜岀駭緙撳瓨銆傚彧鏄鏃墮渶瑕佸湪sql鎵ц淇敼鍚庢墜鍔ㄨ皟鐢?/span>cache鐨勬竻闄ゆ柟娉曘備互淇濊瘉鏁版嵁鐨勪竴鑷存?/span>
2銆佹暟鎹ぇ灝忓湪鍙帴鏀惰寖鍥翠箣鍐咃紱
濡傛灉鏁版嵁琛ㄦ暟鎹噺鐗瑰埆宸ㄥぇ錛屾鏃朵笉閫傚悎浜庝簩綰х紦瀛樸傚師鍥犳槸緙撳瓨鐨勬暟鎹噺榪囧ぇ鍙兘浼氬紩璧峰唴瀛樿祫婧愮揣寮狅紝鍙嶈岄檷浣庢ц兘銆?/span>
濡傛灉鏁版嵁琛ㄦ暟鎹噺鐗瑰埆宸ㄥぇ錛屼絾鏄粡甯鎬嬌鐢ㄧ殑寰寰鍙槸杈冩柊鐨勯偅閮? 鍒嗘暟鎹傛鏃訛紝涔熷彲涓哄叾閰嶇疆浜岀駭緙撳瓨銆備絾鏄繀欏誨崟鐙厤緗叾鎸佷箙鍖栫被鐨勭紦瀛樼瓥鐣ワ紝姣斿鏈澶х紦瀛樻暟銆佺紦瀛樿繃鏈熸椂闂寸瓑錛屽皢榪欎簺鍙傛暟闄嶄綆鑷充竴涓悎鐞嗙殑鑼冨洿錛堝お楂樹細 寮曡搗鍐呭瓨璧勬簮绱у紶錛屽お浣庝簡緙撳瓨鐨勬剰涔変笉澶э級銆?/span>
3銆佹暟鎹洿鏂伴鐜囦綆錛?/span>
瀵逛簬鏁版嵁鏇存柊棰戠巼榪囬珮鐨勬暟鎹紝棰戠箒鍚屾緙撳瓨涓暟鎹殑浠ｄ環鍙兘鍜?/span>鏌ヨ緙撳瓨涓殑鏁版嵁浠庝腑鑾峰緱鐨勫ソ澶勭浉褰擄紝鍧忓鐩婂鐩告姷娑堛傛鏃剁紦 瀛樼殑鎰忎箟涔熶笉澶с?/span>
4銆侀潪鍏抽敭鏁版嵁錛堜笉鏄儲鍔℃暟鎹瓑錛?/span>
璐㈠姟鏁版嵁絳夋槸闈炲父閲嶈鐨勬暟鎹紝緇濆涓嶅厑璁稿嚭鐜版垨浣跨敤鏃犳晥鐨勬暟鎹紝鎵浠ユ鏃朵負浜嗗畨鍏ㄨ搗瑙佹渶濂戒笉瑕佷嬌鐢ㄤ簩綰х紦瀛樸?/span>
鍥犱負姝ゆ椂“姝ｇ‘鎬?#8221;鐨勯噸瑕佹ц繙榪滃ぇ浜?/span>“楂樻ц兘”鐨勯噸瑕佹с?/span>
2. 鐩墠緋葷粺涓嬌鐢?/span>hibernate緙? 瀛樼殑寤鴻
1.4. 鐩墠鎯呭喌
涓鑸郴緇熶腑鏈変笁縐嶆儏鍐典細緇曞紑hibernate鎵ц鏁版嵁搴?/span>鎿嶄綔錛?/span>
姝ょ鎯呭喌浣跨敤hibernate浜岀駭緙撳瓨浼氫笉鍙伩鍏嶇殑閫犳垚鏁版嵁涓嶄竴鑷寸殑闂錛?/font>
璇︾粏鐨勮璁°傛瘮濡傚湪璁捐涓? 閬垮厤瀵瑰悓涓鏁版嵁琛ㄧ殑鍚屾椂鐨勫啓鍏ユ搷浣滐紝
浣跨敤鏁版嵁搴撳悇縐嶇駭鍒殑閿佸畾鏈哄埗絳夈?/font>
2銆佸姩鎬佽〃鐩稿叧
鎵璋?#8220;鍔ㄦ佽〃”鏄寚鍦ㄧ郴緇熻繍琛屾椂鏍規嵁鐢ㄦ埛鐨勬搷浣滅郴緇熻嚜鍔ㄥ緩 绔嬬殑鏁版嵁琛ㄣ?/span>
姣斿“鑷畾涔夎〃鍗?#8221;絳夊睘浜庣敤鎴瘋嚜瀹氫箟鎵╁睍寮鍙戞ц川鐨勫姛鑳芥ā鍧楋紝鍥犱負姝ゆ椂鏁版嵁琛ㄦ槸榪愯鏃跺緩绔嬬殑錛屾墍浠ヤ笉鑳借繘琛宧ibernate鐨勬槧灝勩傚洜姝ゅ瀹冪殑鎿嶄綔鍙兘 鏄粫寮hibernate鐨勭洿鎺ユ暟鎹簱JDBC鎿嶄綔銆?/span>
濡傛灉姝ゆ椂鍔ㄦ佽〃涓殑鏁版嵁娌℃湁璁捐緙撳瓨錛屽氨涓嶅瓨鍦ㄦ暟鎹笉涓鑷寸殑闂? 棰樸?/span>
濡傛灉姝ゆ椂鑷璁捐浜嗙紦瀛樻満鍒訛紝鍒欒皟鐢ㄨ嚜宸辯殑緙撳瓨鍚屾鏂規硶鍗? 鍙?/span>
3銆佷嬌鐢?/span>sql瀵? hibernate鎸佷箙鍖栧璞¤〃榪涜鎵歸噺鍒犻櫎鏃?/span>
姝ゆ椂鎵ц鎵歸噺鍒犻櫎鍚庯紝緙撳瓨涓細瀛樺湪宸茶鍒犻櫎鐨勬暟鎹?/span>
鍒? 鏋愶細
褰撴墽琛屼簡絎?鏉★紙sql鎵歸噺鍒犻櫎錛夊悗錛屽悗緇殑鏌ヨ鍙彲鑳芥槸浠ヤ笅涓夌鏂瑰紡錛?/span>
a. session.find錛堬級鏂規硶錛?/span>
鏍規嵁鍓嶉潰鐨勬葷粨錛?/span>find鏂規硶涓嶄細鏌ヨ浜岀駭緙撳瓨鐨勬暟鎹紝鑰屾槸鐩存帴鏌ヨ鏁版嵁搴撱?/span>
鎵浠ヤ笉瀛樺湪鏁版嵁鏈夋晥鎬х殑闂銆?/span>
b. 璋冪敤iterate鏂規硶鎵ц鏉′歡鏌ヨ鏃訛細
鏍規嵁iterate鏌ヨ鏂規硶鐨勬墽琛屾柟寮忥紝鍏舵瘡嬈￠兘浼氬埌鏁版嵁搴撲腑鏌ヨ婊¤凍鏉′歡鐨?/span>id鍊鹼紝鐒跺悗鍐嶆牴鎹id 鍒扮紦瀛樹腑鑾峰彇鏁版嵁錛屽綋緙撳瓨涓病鏈夋id鐨勬暟鎹墠浼氭墽琛屾暟鎹簱鏌ヨ錛?/span>
濡傛灉姝よ褰曞凡琚?/span>sql鐩存帴鍒犻櫎錛屽垯iterate鍦ㄦ墽琛?/span>id鏌ヨ鏃朵笉浼氬皢姝?/span>id鏌ヨ鍑烘潵銆傛墍浠ワ紝鍗充究緙撳瓨涓湁姝ゆ潯璁板綍涔熶笉浼氳瀹㈡埛鑾峰緱錛屼篃灝? 涓嶅瓨鍦ㄤ笉涓鑷寸殑鎯呭喌銆傦紙姝ゆ儏鍐電粡榪囨祴璇曢獙璇侊級
c. 鐢?/span>get鎴?/span>load鏂規硶鎸?/span>id鎵ц鏌ヨ錛?/span>
瀹㈣涓婃鏃朵細鏌ヨ寰楀埌宸茶繃鏈熺殑鏁版嵁銆備絾鏄張鍥犱負緋葷粺涓墽琛?span style="font-size: 12pt;">sql鎵歸噺鍒犻櫎涓鑸槸
閽堝涓棿鍏寵仈鏁版嵁琛紝瀵逛簬
涓棿鍏寵仈琛ㄧ殑鏌ヨ涓鑸兘鏄噰鐢ㄦ潯浠舵煡璇?/span> ,鎸?/span>id鏉ユ煡璇㈡煇涓鏉″叧鑱斿叧緋葷殑鍑犵巼寰堜綆,鎵浠ユ闂涔熶笉瀛樺湪!
濡傛灉鏌愪釜鍊煎璞＄‘瀹為渶瑕佹寜id鏌ヨ涓鏉″叧鑱斿叧緋?/span>,鍚屾椂鍙堝洜涓烘暟鎹噺澶т嬌鐢?/span>浜?/span>sql鎵ц鎵歸噺鍒犻櫎銆傚綋婊¤凍姝や袱涓潯浠舵椂,涓轟簡淇濊瘉鎸?/span>id 鐨勬煡璇㈠緱鍒版紜殑緇撴灉,鍙互浣跨敤鎵嬪姩娓呮浜岀駭緙撳瓨涓瀵硅薄鐨勬暟鎹殑鏂規硶!!
(姝ょ鎯呭喌鍑虹幇鐨勫彲鑳芥ц緝灝?/span>)
1.5. 寤鴻
1銆佸緩璁笉瑕佷嬌鐢?/span>sql鐩存帴鎵ц鏁版嵁鎸佷箙鍖栧璞＄殑鏁版嵁鐨勬洿鏂幫紝浣嗘槸鍙互鎵ц鎵歸噺鍒犻櫎銆傦紙緋葷粺涓渶瑕佹壒閲忔洿鏂扮殑鍦版柟涔熻緝灝戯級
2銆佸鏋滃繀欏諱嬌鐢?/span>sql鎵ц鏁版嵁鐨勬洿鏂幫紝蹇呴』娓呯┖姝ゅ璞＄殑緙撳瓨鏁版嵁銆傝皟鐢?/span>
SessionFactory.evict(class)
SessionFactory.evict(class,id)
絳夋柟娉曘?/span>
3銆佸湪鎵歸噺鍒犻櫎鏁版嵁閲忎笉澶х殑鏃跺欏彲浠ョ洿鎺ラ噰鐢?/span>hibernate鐨勬壒閲忓垹闄わ紝榪欐牱灝變笉瀛樺湪緇曞紑hibernate鎵цsql浜х敓鐨勭紦瀛樻暟鎹竴鑷存х殑闂銆?/span>
4銆佷笉鎺ㄨ崘閲囩敤hibernate鐨勬壒閲忓垹闄ゆ柟娉曟潵鍒犻櫎澶ф壒閲忕殑璁板綍鏁版嵁銆?/span>
鍘熷洜鏄?/span>hibernate鐨勬壒閲忓垹闄や細鎵ц1鏉℃煡璇㈣鍙ュ鍔?/span>婊¤凍鏉′歡鐨?/span>n鏉″垹闄よ鍙ャ傝屼笉鏄竴嬈℃墽琛屼竴鏉℃潯浠跺垹闄よ鍙ワ紒錛?/span>
褰撳緟鍒犻櫎鐨勬暟鎹緢澶氭椂浼氭湁寰堝ぇ鐨勬ц兘鐡墮錛侊紒錛佸鏋滄壒閲忓垹闄ゆ暟 鎹噺杈冨ぇ,姣斿瓚呰繃50鏉?/span>,鍙互閲囩敤JDBC鐩存帴鍒犻櫎銆傝繖鏍蜂綔鐨勫ソ澶勬槸鍙墽琛屼竴鏉?/span>sql鍒犻櫎璇彞,鎬ц兘浼氭湁寰堝ぇ鐨勬敼鍠勩傚悓鏃訛紝緙撳瓨鏁版嵁鍚屾鐨勯棶棰?/span>,鍙互閲囩敤 hibernate娓? 闄や簩綰х紦瀛樹腑鐨勭浉鍏蟲暟鎹殑鏂規硶銆?/span>
璋冪敤 SessionFactory.evict(class) 錛?/span>SessionFactory.evict(class,id)絳夋柟娉曘?/span>
鎵浠ヨ錛屽浜庝竴鑸殑搴旂敤緋葷粺寮鍙戣岃█錛堜笉娑夊強鍒伴泦緹わ紝鍒嗗竷寮忔暟 鎹悓姝ラ棶棰樼瓑錛夛紝鍥犱負鍙湪涓棿鍏寵仈琛ㄦ墽琛屾壒閲忓垹闄ゆ椂璋冪敤浜?/span>sql鎵ц錛屽悓鏃朵腑闂村叧鑱旇〃涓鑸槸鎵ц鏉′歡鏌ヨ涓嶅お鍙兘鎵ц鎸?/span>id鏌ヨ銆傛墍浠ワ紝姝ゆ椂鍙互鐩存帴鎵цsql鍒犻櫎錛岀敋鑷充笉闇瑕佽皟鐢ㄧ紦瀛樼殑娓呴櫎鏂規硶銆傝繖鏍峰仛涓嶄細瀵艱嚧浠ュ悗閰嶇疆 浜嗕簩綰х紦瀛樺紩璧鋒暟鎹湁鏁堟х殑闂銆?/span>
閫涓姝ヨ錛屽嵆浣夸互鍚庣湡鐨勮皟鐢ㄤ簡鎸?/span>id鏌ヨ涓棿琛ㄥ璞＄殑鏂規硶錛屼篃鍙互閫氳繃璋冪敤娓呴櫎緙撳瓨鐨勬柟娉曟潵瑙ｅ喅銆?/span>
4銆佸叿浣撶殑閰嶇疆鏂規硶
鏍規嵁鎴戜簡瑙ｇ殑寰堝hibernate鐨勪嬌鐢ㄨ呭湪璋冪敤鍏剁浉搴旀柟娉曟椂閮借糠淇＄殑鐩鎬俊“hibernate浼氳嚜琛屼負鎴戜滑澶勭悊鎬ц兘鐨勯棶棰?#8221;錛屾垨 鑰?#8220;hibernate浼氳嚜鍔ㄤ負鎴戜滑鐨勬墍鏈夋搷浣滆皟鐢ㄧ紦瀛?#8221;,瀹為檯鐨勬儏鍐墊槸hibernate铏界劧涓烘垜浠彁渚涗簡寰堝ソ鐨勭紦瀛樻満鍒跺拰鎵╁睍緙撳瓨妗嗘灦鐨勬敮鎸侊紝浣嗘槸蹇? 欏葷粡榪囨紜殑璋冪敤鍏舵墠鏈夊彲鑳藉彂鎸ヤ綔鐢紒錛佹墍浠ラ犳垚寰堝浣跨敤hibernate鐨勭郴緇熺殑鎬ц兘闂錛屽疄闄呬笂騫朵笉鏄痟ibernate涓嶈鎴栬呬笉濂斤紝鑰屾槸鍥犱負浣? 鐢ㄨ呮病鏈夋紜殑浜嗚В鍏朵嬌鐢ㄦ柟娉曢犳垚鐨勩傜浉鍙嶏紝濡傛灉閰嶇疆寰楀綋hibernate鐨勬ц兘琛ㄧ幇浼氳浣犳湁鐩稿綋“鎯婂枩鐨?#8221;鍙戠幇銆備笅闈㈡垜璁茶В鍏蜂綋鐨勯厤緗柟娉?
ibernate鎻愪緵浜嗕簩綰х紦瀛樼殑鎺ュ彛錛?
net.sf.hibernate.cache.Provider,
鍚?
鏃舵彁渚涗簡涓涓粯璁ょ殑 瀹炵幇net.sf.hibernate.cache.HashtableCacheProvider錛?
涔熷彲浠ラ厤緗?
鍏朵粬鐨勫疄鐜?姣斿ehcache,jbosscache絳夈?
鍏蜂綋鐨勯厤緗綅緗綅浜巋ibernate.cfg.xml鏂囦歡涓?
<property
name="hibernate.cache.use_query_cache">true</property>
<property
name="hibernate.cache.provider_class">net.sf.hibernate.cache.HashtableCacheProvider</property>
寰堝鐨刪ibernate浣跨敤鑰呭湪 閰嶇疆鍒?榪欎竴姝?灝變互涓?瀹屼簨浜嗭紝
娉ㄦ剰錛氬叾瀹炲厜榪欐牱閰嶏紝鏍規湰
灝辨病鏈変嬌鐢╤ibernate鐨勪簩綰х紦瀛樸傚悓鏃跺洜涓轟粬浠湪浣跨敤hibernate鏃跺ぇ澶氭椂鍊欐槸椹笂鍏抽棴session錛屾墍浠ワ紝涓綰х紦瀛樹篃娌℃湁璧峰埌浠諱綍浣?
鐢ㄣ傜粨鏋滃氨鏄病鏈変嬌鐢ㄤ換浣曠紦瀛橈紝鎵鏈夌殑hibernate鎿嶄綔閮芥槸鐩存帴鎿嶄綔鐨勬暟鎹簱錛侊紒鎬ц兘鍙互鎯寵銆?
姝ｇ‘鐨勫姙娉曟槸闄や簡浠ヤ笂鐨勯厤緗榪樺簲璇ラ厤緗瘡涓涓獀o瀵硅薄鐨勫叿浣撶紦瀛樼瓥鐣ワ紝鍦ㄥ獎灝勬枃浠朵腑閰嶇疆銆備緥濡傦細
<hibernate-mapping>
<class
name="com.sobey.sbm.model.entitySystem.vo.DataTypeVO"
table="dcm_datatype">
<cache usage="read-write"/>
<id
name="id" column="TYPEID" type="java.lang.Long">
<generator
class="sequence"/>
</id>
<property name="name" column="NAME"
type="java.lang.String"/>
<property name="dbType"
column="DBTYPE" type="java.lang.String"/>
</class>
</hibernate-mapping>
鍏抽敭灝辨槸榪欎釜<cache usage="read-write"/>錛屽叾鏈夊嚑涓夋嫨
read-
only,read-write,transactional,絳?
鐒跺悗鍦ㄦ墽琛屾煡璇㈡椂 娉ㄦ剰浜?
錛屽鏋滄槸鏉′歡鏌ヨ錛屾垨鑰呰繑鍥炴墍鏈夌粨鏋滅殑鏌ヨ錛屾鏃秙ession.find()鏂規硶
涓嶄細鑾峰彇緙撳瓨涓殑鏁版嵁銆傚彧鏈夎皟鐢╭uery.iterate()鏂規硶鏃舵墠浼氳皟緙撳瓨鐨勬暟鎹?
鍚屾椂 get 鍜?load鏂規硶 鏄兘浼氭煡璇㈢紦瀛樹腑鐨勬暟鎹?.
瀵逛簬涓嶅悓鐨勭紦瀛樻鏋跺叿浣撶殑閰嶇疆鏂規硶浼氭湁涓嶅悓錛屼絾鏄ぇ浣撴槸浠ヤ笂鐨勯厤緗?/font>
錛堝彟澶栵紝瀵逛簬鏀寔浜嬪姟鍨嬶紝浠ュ強鏀寔闆嗙兢鐨勭幆澧冪殑閰嶇疆鎴戜細浜夊彇鍦ㄥ悗緇殑鏂囩珷涓腑 鍙戣〃鍑烘潵錛?/font>
3. 鎬葷粨
鎬諱箣鏄牴鎹笉鍚岀殑涓氬姟鎯呭喌鍜岄」鐩儏鍐? 瀵?/span>hibernate榪涜鏈夋晥鐨勯厤緗拰姝ｇ‘鐨勪嬌鐢紝鎵暱閬跨煭銆備笉瀛樺湪閫傚悎浜庝換浣曟儏鍐電殑涓涓?#8220;涓囪兘”鐨勬柟妗堛?/span>
浠ヤ笂緇撹鍙婂緩璁潎寤虹珛鍦ㄨ嚜宸卞湪瀵?/span> Hibernate 2.1.2涓殑嫻嬭瘯緇撴灉浠ュ強浠ュ墠鐨勯」鐩粡楠岀殑鍩虹涓娿傚鏈夎艾澶勶紝璇鋒墦瀹舵彁 鍑烘寚姝?)!
鏈鍚庯紝紲濆ぇ瀹? 鏂板勾蹇箰錛侊紒鍦ㄦ柊鐨勪竴騫撮噷 鍙栧緱浜虹敓鐨勮繘姝ワ紒錛侊紒
]]>
鎵撳紑NetBeans 6.5.1錛岄夋嫨鏂囦歡鈥斻嬫柊寤洪」鐩紝閫夋嫨Java Web錛岀劧鍚庡湪欏圭洰鍒楄〃涓夋嫨 Web 搴旂敤紼嬪簭錛屼笅涓姝?
閫夋嫨浣跨敤涓撶敤鏂囦歡澶瑰瓨鍌ㄥ簱錛屾寚瀹氬簱鏂囦歡澶圭殑浣嶇疆錛岄氬父鏄粯璁ょ殑.\lib錛屽嵆欏圭洰鏂囦歡澶逛笅鐨刲ib鏂囦歡澶癸紝涓嬩竴姝?
閫夋嫨Web搴旂敤鏈嶅姟鍣ㄣ傝繖閲岄夋嫨Tomcat 6.0.18 錛孞ava EE鐗堟湰閫夋嫨 Java EE 5錛屼笅涓姝?
鍦ㄦ鏋跺璇濇涓粈涔堥兘涓嶉夋嫨錛岀洿鎺ョ偣鍑誨畬鎴愩?
閰嶇疆欏圭洰錛?/h4>
1. 閰嶇疆OperaMask
鍦╓EB-INF鏂囦歡澶逛笅鏂板緩涓涓猣aces-config.xml鏂囦歡錛屽唴瀹瑰涓嬶細
<?xml version="1.0" encoding="UTF-8"?>
<faces-config xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd" version="1.2">
<application>
<view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
</application>
</faces-config>
鍦ㄦ柊鍒涘緩鐨勯」鐩腑錛屽彸閿崟鍑?#8220;搴?#8221;鑺傜偣錛岄夋嫨娣誨姞搴?
鐒跺悗閫夋嫨瀵煎叆錛岄夋嫨Spring 2.5搴擄紝閫夋嫨瀵煎叆搴擄紝娣誨姞搴撱?
鍐嶆閫夋嫨娣誨姞搴擄紝鐒跺悗閫夋嫨鍒涘緩銆傚簱鍚嶇О涓篛peraMask錛屽簱綾誨瀷涓虹被搴擄細
鍦?#8220;瀹氬埗搴?#8221;涓夋嫨“娣誨姞JAR/鏂囦歡澶?#8221;錛屽湪寮瑰嚭鐨勫璇濇涓夋嫨OperaMask鐨勫熀鏈琷ar鍖咃紝騫跺皢瀵煎叆鏂瑰紡鎸囧畾涓猴細澶嶅埗鍒板簱鏂囦歡澶廣?
涓璺夋槸銆?
2. 閰嶇疆Spring浠ュ強涓嶰peraMask鐨勬暣鍚?/strong>
鐒跺悗鍐嶅垱寤轟竴涓狾peraMask_SpringCompatibility搴擄紝灝哋peraMask涓殑spring鏂囦歡澶逛笅鐨刼peramasks-spring.jar娣誨姞榪涙潵
鐒跺悗鍦ㄦ柊鍒涘緩鐨勯」鐩腑灞曞紑WEB-INF鏂囦歡澶癸紝鎵撳紑web.xml錛氭寜鐓peraMask鍖呬腑鐨刡lank鏍蜂緥紼嬪簭鐨勯厤緗繘琛岄厤緗?
涔嬪悗錛屽湪web.xml涓厤緗涓嬪唴瀹癸細
|
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> |
鐒跺悗錛屽湪婧愬寘鑺傜偣涓嬪垱寤篠pring閰嶇疆鏂囦歡applicationContext.xml錛岄夋嫨濡傚浘鎵紺虹殑鍑犱釜鍛藉悕絀洪棿錛?
閫夋嫨瀹屾垚錛岀劧鍚庡湪Beans鑺傜偣涔嬮棿娣誨姞濡備笅鍐呭錛?
|
<!-- 寮鍚熀浜庢敞瑙ｇ殑閰嶇疆 --> <context:annotation-config/> <!-- 浣?AOM 涓殑 LiteBean 鍚屾牱鑳藉琚?Spring 鎵鎰熷簲鍒?--> <bean class="org.operamasks.faces.spring.ManagedBeanConfigurer"/> |
3. 閰嶇疆JPA鎸佷箙鍖栨敮鎸?/strong>
鍦ㄦ湇鍔￠夐」鍗′腑錛岄夋嫨MySQL鏁版嵁搴撻┍鍔紝鐒跺悗鍙抽敭鍗曞嚮錛岄夋嫨榪炴帴璁劇疆錛岄厤緗綘瑕佷嬌鐢ㄧ殑鏁版嵁搴擄細
鏁版嵁搴撻厤緗畬姣曪紝鐒跺悗鍥炲埌欏圭洰閫夐」鍗★紝鍙抽敭鍗曞嚮鍒氬垱寤虹殑欏圭洰錛岄夋嫨鏂板緩-->鍏跺畠-->鎸佷箙鎬?->鎸佷箙鎬у崟鍏?
鍦ㄦ柊寤烘寔涔呮у崟鍏冨璇濇涓夋嫨鎸佷箙鎬у簱涓篐ibernate錛屽嵆閫夋嫨Hibernate涓篔PA鎸佷箙鍗曞厓鐨勫疄鐜幫紝鏁版嵁搴撹繛鎺ラ夋嫨鎴戜滑鍒氶厤緗ソ鐨凪ySQL榪炴帴銆?
鍗曞嚮瀹屾垚銆傛鏃訛紝Hibernate鐨凧PA搴撳凡緇忚娣誨姞鍒伴」鐩殑lib鐩綍涓嬩簡銆傚寘鍚簡鍩烘湰鐨凥ibernate jar鍖呭拰Hibernate JPA鏀寔jar鍖呫?
娉細浣跨敤JPA鐨勪竴涓ソ澶勫氨鏄垜浠笉闇瑕佸湪涓涓粺涓鐨勯厤緗枃浠墮噷緗楀垪鎵鏈夌殑瀹炰綋綾伙紝鑰屾槸鍙互璁╁疄浣撶鐞嗗櫒鑷姩鎵弿鎵鏈夎@Entity娉ㄨВ浜嗙殑瀹炰綋綾匯傝瀹炵幇榪欑鍔熻兘錛屽鏋滈」鐩殑JPA瀹炵幇榪佺Щ鍒癟opLink Essential錛岄渶瑕佸姞鍏ヤ笅闈㈢殑閰嶇疆錛?
鎵懼埌欏圭洰涓殑“閰嶇疆鏂囦歡”鑺傜偣錛屾墦寮persistence.xml鏂囦歡錛岃皟鏁村埌XML瑙嗗浘涓紝鍦?lt;provider> </provider>鑺傜偣鍚庢坊鍔狅細
<exclude-unlisted-classes>false</exclude-unlisted-classes> 涓琛屻傚鏋滃笇鏈涗嬌鐢℉ibernate瀹炵幇錛岃涓瀹氫笉瑕佸姞鍏ヨ繖涓琛岋紝鍚﹀垯錛屾偍蹇呴』灝嗘偍鍒涘緩鐨勬墍鏈夊疄浣撶被閫愪竴娣誨姞鍒皃ersistence.xml涓?
濡傛灉瑕佷嬌鐢⊿pring鎻愪緵鐨凧paTemplate錛堝嵆瀹炵幇JpaDaoSupport鏂瑰紡錛夛紝鍒欏洖鍒皊pring鐨刟pplicationContext.xml鏂囦歡錛屽湪<beans>鑺傜偣閲岄潰娣誨姞錛?
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<!-- 鍒╃敤Spring鐨勫疄浣撶鐞嗗櫒宸ュ巶鏉ュ垱寤篔PA瀹炰綋綆＄悊鍣紝浼犲叆鐨勫弬鏁頒負persistence.xml涓寚瀹氱殑鎸佷箙鍖栧崟鍏冨悕縐?--> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> <property name="persistenceUnitName" value="DMCSv1PU"/> </bean> <!-- 澹版槑涓涓猄pring鎻愪緵鐨凧PA浜嬪姟綆＄悊鍣紝浼犲叆鐨勫弬鏁版鏄疭pring涓殑瀹炰綋綆＄悊鍣ㄥ伐鍘?--> <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory"/> </bean> <!-- 寮鍚疭pring鎻愪緵鐨勫熀浜庢敞瑙ｇ殑澹版槑寮忎簨鍔＄鐞?--> <tx:annotation-driven transaction-manager="txManager"/> |
鑷蟲錛屾寔涔呭寲鏀寔閰嶇疆瀹屾瘯銆?
鍒涘緩瀹炰綋綾誨拰鐩稿簲鐨凧PA鎺у埗綾?/h4>
鍙抽敭鍗曞嚮欏圭洰錛岄夋嫨鏂板緩-->鍏跺畠-->鎸佷箙鎬?->閫氳繃鏁版嵁搴撶敓鎴愬疄浣撶被錛岄夋嫨鏁版嵁搴撹〃錛?
鐐瑰嚮涓嬩竴姝ワ紝杈撳叆鍚堥傜殑鍖呭悕
涓嬩竴姝ワ紝鏄犲皠閫夐」濡備笅鍥炬墍紺猴細
閫夋嫨鏂板緩-->鍏跺畠-->鎸佷箙鎬?->鍩轟簬瀹炰綋綾葷殑JPA鎺у埗鍣ㄧ被錛屼笅涓姝ワ細
娣誨姞瑕佺敓鎴愭帶鍒跺櫒綾葷殑瀹炰綋綾伙紝涓嬩竴姝ワ細
閫夋嫨鍚堥傜殑鍖咃紝鐒跺悗瀹屾垚銆?
鍚庨潰鐨勯厤緗棤闈炲氨鏄皢JPA鐨勬帶鍒跺櫒綾誨啓鍏pring鐨勯厤緗枃浠訛紝鐒跺悗鍦ˋOM鐨凩iteBean涓敞鍏ヨ繖浜涙帶鍒跺櫒綾伙紝瀹炵幇鏁版嵁搴撴搷浣滀互鍙婄浉搴旂殑涓氬姟閫昏緫銆?
娉細瑙ｅ喅Spring涓嶩ibernate JPA鐨勫啿紿侊細
濡備笂鍥炬墍紺猴細閫夋嫨宸ュ叿--> 搴?--> 搴撲綅緗?->閫夋嫨褰撳墠緙栬緫鐨勯」鐩紝閫変腑Spring Framework 2.5錛岀劧鍚庡幓鎺塩glib2.2閭ｄ釜jar鍖呫傝繖涓寘涓嶩ibernate JPA涓殑cglib 2.1.3.jar鏈夊啿紿?
鏂囩珷鏉ユ簮:http://x-spirit.spaces.live.com/Blog/cns!CC0B04AE126337C0!776.entry
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