鍛ㄨ浼?BR>
涓錛?璁捐妯″紡閲嶈鎬?BR>閲囩敤錛ワ吉錛㈡妧鏈殑錛紥錛ワ譏欏圭洰涓紝錛ワ吉錛㈡灦鏋勭殑璁捐濂藉潖灝嗙洿鎺ュ獎鍝嶇郴緇熺殑鎬ц兘銆佸彲鎵╁睍鎬с佸彲緇存姢鎬с佺粍浠跺彲閲嶇敤鎬у強寮鍙戞晥鐜囥傞」鐩秺澶嶆潅錛岄」鐩槦浼嶈秺搴炲ぇ鍒欒秺鑳戒綋鐜拌壇濂借璁＄殑閲嶈鎬с?
浜岋紟 甯歌EJB璁捐妯″紡
Session Facade Pattern
閫氬父欏圭洰涓紝瀹㈡埛绔線寰闇瑕侀綣佺殑瀵規湇鍔″櫒绔暟鎹繘琛屾搷浣溿傚綋閲囩敤瀹炰綋錛ワ吉錛綔涓烘暟鎹殑鎶借薄灞傛椂錛屽鏋滅洿鎺ヨ瀹㈡埛绔▼搴忎笌瀹炰綋錛ワ吉錛氦浜掞紝浼氫駭鐢熷疄鐜頒竴涓笟鍔￠渶姹備究闇瑕佸ぇ閲忕殑錛ワ吉錛㈠睘鎬ф搷浣滐紙濡備笅鍥撅紤錛夈傝繖鐩存帴瀵艱嚧濡備笅闂錛氱綉緇滆礋杞藉ぇ錛堣繙紼嬪鎴風鏃訛級銆佸茍鍙戞ц兘浣庛佸鎴風涓庢湇鍔″櫒绔叧鑱斿害澶с佸彲閲嶇敤鎬у拰鍙淮鎶ゆу樊銆佹ц兘
鍥犳鏈夊繀瑕佸湪瀹㈡埛绔笌瀹炰綋錛ワ吉錛㈠眰闂村姞鍏ession銆錛ワ吉錛㈠眰錛屽湪Sessino EJB涓疄鐜板晢涓氶昏緫騫跺皝瑁呭瀹炰綋錛ワ吉錛㈢殑鎿嶄綔銆傦紙濡備笅鍥撅紥錛?BR>
鍥撅紤錛氬鎴風鐩存帴涓庡疄浣擄譏錛饑浜や簰
鍥撅紥錛氶氳繃SessionEJB灞傚疄鐜?BR>Session Fa?ade妯″紡鐨勫ソ澶勬槸錛氶檷浣庝簡緗戠粶璐熻澆錛孲essionEjb鍙互璋冪敤瀹炰綋錛ワ吉錛㈢殑鏈湴鎺ュ彛錛涘皢鍟嗕笟閫昏緫涓庡晢涓氭暟鎹殧紱伙紱緇存姢涓庡紑鍙戞柟渚匡紱鏄捐憲鎻愰珮鎬ц兘銆?BR>Session Fa?ade妯″紡鍥犲叾綆鍗曚嬌鐢紝鏄洰鍓嶄嬌鐢ㄥ緢騫跨殑妯″紡銆備絾鍏蜂綋搴旂敤榪囩▼涓簲娉ㄦ剰錛氶伩鍏嶅皢鎵鏈夌殑鎿嶄綔灝佽鍒頒竴涓緢澶х殑SessionEJB鍐咃紱鏈嶅姟鍣ㄧ鏁版嵁緇撴瀯搴旂敱瀹炰綋EJB瀹炵幇,闄ら潪鐗逛緥鍚﹀垯閬垮厤鐩存帴鐨勬暟鎹簱鎿嶄綔錛汼essionEjb鍐呮煇浜涚郴緇熼氱敤鎿嶄綔鐨勪唬鐮佸鏄撻噸澶嶏紙姣斿鏉冮檺媯鏌ョ瓑錛岃В鍐沖姙娉曟槸灝嗙郴緇熼氱敤鏈嶅姟灝佽鍦↗ava Class鍐咃級銆?/P>
Message Facade Pattern
寰堝鏃跺欙紝涓嬈equest闇瑕佹搷浣滃涓譏錛饑鍙堜笉闇瑕佸緱鍒板嵆鏃惰繑鍥炪傚榪欑寮傛璋冪敤錛岄氬父搴旂敤Message Fa?ade Pattern.
榪欑鏃跺欙紝濡傞噰鐢⊿ession Fa?ade Pattern瀛樺湪濡備笅闂錛?BR>1. 瀹㈡埛绔瓑寰呰繑鍥炵殑鏃墮棿榪囬暱銆備竴涓猄essionEjb鐨勫疄渚嬪湪瀹屾垚瀹㈡埛璇鋒眰榪囩▼涓腑娑夊強鍒扮殑姣忎竴嬈″鍏朵粬瀹炰綋Ejb鐨勮皟鐢ㄨ繃紼嬩腑閮戒細琚攣瀹氱洿鍒板緱鍒板疄浣揈JB榪斿洖淇℃伅鍚庢墠鑳借繘琛屼笅涓姝ユ搷浣溿傝繖鏍烽犳垚瀹㈡埛涓嶅繀瑕佺殑絳夊緟錛屽茍寰堝鏄撳洜鏃墮棿瀵艱嚧鏁翠釜浜嬪姟澶辮觸銆?BR>2. 緋葷粺鍙潬鎬у拰瀹歸敊鎬т綆銆傚鏋滈渶瑕佽皟鐢ㄤ笉鍚岀郴緇熸垨鏈嶅姟鍣ㄤ笂鎴栧涓紓鏋勬暟鎹簮鐨勫涓譏錛饑鏃訛紝浠諱綍涓涓幆鑺傚嚭閿欙紝鍧囧鑷村鎴瘋姹傚け璐ャ?BR>浠essage-Driven Bean涓哄熀紜鐨凪essage Facade Pattern鍒欏彲浠ヨВ鍐充笂榪板紓姝ヨ姹傞渶姹傘傚叿浣撴灦鏋勮涓嬪浘錛?
銆鍥撅紦錛氫嬌鐢∕essage Facade Pattern
Message Facade Pattern鐨勪笉瓚充箣澶勫湪浜庯細
錛戯紟 Message-Driven Bean娌℃湁榪斿洖鍊箋傝繖鏍烽氱煡瀹㈡埛鎵ц緇撴灉鍙兘渚濊禆浜庯譏锝嶏絹锝夛綄鎴栦漢宸ョ瓑鍏朵粬鎵嬫銆?BR>錛掞紟 Message-Driven Bean鎵ц榪囩▼涓棤娉曞皢鎹曡幏鐨勫紓甯哥洿鎺ヨ繑鍥炵粰瀹㈡埛绔紝鍗蟲棤娉曚嬌瀹㈡埛绔洿鎺ョ洿鍒伴敊璇俊鎭?BR>錛擄紟 Message-Driven Bean閫氳繃鎺ユ敹Message鍝嶅簲瀹㈡埛璇鋒眰錛屽Message鍐呭鐨勫悎娉曟э紙姣斿瀵硅薄鐨勭被鍨嬬瓑錛変緷璧栦笌瀹㈡埛绔?瀹規槗浜х敓榪愯鏃墮敊璇?BR>Message Facade Pattern緇忓父涓嶴ession Facade Pattern鍦ㄥ悓涓涓」鐩噷鍏卞悓浣跨敤銆?/P>
EJB Command Pattern
Session Facade Pattern涓皢鍟嗕笟閫昏緫瀹炵幇灝佽鍦⊿ession EJB涓紝榪欑鍋氭硶甯︽潵璇稿鐩婂涔嬪涔熷甫鏉ュ涓嬮棶棰橈細
錛戯紟 鐢變簬涓氬姟緇忓父鐨勫彉鍖栵紝瀵艱嚧緇忓父闇瑕佹洿鏂癝ession EJB浠ｇ爜銆?BR>錛掞紟 瀹㈡埛绔唬鐮佷笉寰椾笉鍖呭惈澶ч噺EJB鐩稿叧鐨勶肌錛幫緝錛屼笉鍒╀簬鍚庢湡欏圭洰緇存姢銆?BR>錛擄紟 欏圭洰寮鍙戞祴璇曢渶瑕佺粡甯哥殑EJB閲嶉儴緗茶繃紼嬨?BR>寮曡搗涓婅堪闂鐨勯噸瑕佹牴緇撳氨鏄疭ession EJB鏈韓閲嶉噺綰х粍浠訛紝鍏跺紑鍙戞祴璇曢儴緗插伐浣滈噺杈冨ぇ錛屽紑鍙戝懆鏈熻緝闀褲備互涓婁笉瓚沖彲浠ラ氳繃EJB Command Pattern鍏嬫湇銆?BR>EJB Command Pattern涓皢鍟嗕笟閫昏緫瀹炵幇灝佽鍦ㄦ櫘閫氱殑Java Class錛堢О涔嬩負Command Bean錛変腑銆傝妯″紡鐨勫叿浣撳疄鐜版湁寰堝縐嶏紝閫氬父鐨勬鏋墮兘鍖呮嫭涓夐儴鍒嗭細
錛戯紟 Command Bean.鐢卞簲鐢ㄥ紑鍙戣呭啓鐨勫叿浣撳疄鐜版煇鍟嗕笟鎿嶄綔鐨凧ava Class.涓昏鍖呭惈getXXX(),setXXX(),execute()鏂規硶銆?BR>錛掞紟 Client-Side Routing Logic.鐢卞涓狢lass緇勬垚錛岀敤浜庡皢璇鋒眰杞彂鑷?B style="COLOR: black; BACKGROUND-COLOR: #ffff66">Command Sever錛岃繖涓繃紼嬪瀹㈡埛鏄忔槑鐨勩傝繖閮ㄥ垎浠ｇ爜鍙互璺ㄩ」鐩嬌鐢ㄣ傝礬鐢辮鍒欎腑鍙互鑰冭檻鐢幾錛棘鎶鏈?BR>錛擄紟 Remote Command Server.瀹為檯鎵ц鍟嗕笟鎿嶄綔璇鋒眰銆傞氬父鍙互鐢⊿ession EJB灞傚疄鐜般?/P>
銆鏁翠釜妗嗘灦瑙佷笅鍥撅紨錛?BR>
銆鍥撅紨錛?B style="COLOR: black; BACKGROUND-COLOR: #ffff66">Command鐨勫熀鏈鏋?BR>EJB Command Pattern鍏鋒湁濡備笅濂藉錛?BR>錛戯紟 閫傚簲涓庨渶瑕佸揩閫熷紑鍙戠幆澧冦傚洜Command Bean鏄交閲忕駭鐨凧ava Class錛屽叾緙栬瘧鍜岃皟璇曟瘮杈冩柟渚褲?BR>錛掞紟 灝嗚〃鐜板眰涓庡晢涓氬疄鐜板眰闅旂錛屽悓鏃跺皢瀹㈡埛绔唬鐮佷笌EJB灞傞殧紱匯?BR>錛擄紟 灝嗗鎴風浠ｇ爜寮鍙戜笌鏈嶅姟鍣ㄧ浠ｇ爜寮鍙戠浉瀵規竻鏅般傛棭鏈熷彲浠ュ垱寤虹┖鐨?B style="COLOR: black; BACKGROUND-COLOR: #ffff66">Command Bean鏂逛究瀹㈡埛绔唬鐮佽皟璇曘?BR>銆銆銆銆EJB Command Pattern鐨勫急澶勫湪浜庯細
錛戯紟 Command Bean涓浜嬪姟鐨勬帶鍒朵笉濡係ession EJB涓?BR>錛掞紟 Command Bean鏄棤鐘舵佺殑銆?BR>錛擄紟 鏃犳硶灝嗗紓甯哥洿鎺ヨ繑鍥炵粰瀹㈡埛銆?BR>錛旓紟 鍦ㄥぇ欏圭洰涓紝鐢變簬鍟嗕笟閫昏緫澶嶆潅錛屽父瀵艱嚧澶ф暟閲忕殑Command Bean瀛樺湪.
錛曪紟 浣滀負Command Server鐨凷ession EJB鎵撳寘鏃跺繀欏誨寘鍚?B style="COLOR: black; BACKGROUND-COLOR: #ffff66">Command Bean浠ヨ嚧瀛樺湪緇存姢涓婄殑涓嶄究銆?BR>銆銆EJB Command Pattern鐨勪竴涓疄闄呭疄鐜板彲浠ュ弬鑰僆BM's Command Framework.
Data Transfer Object Factory
鍩轟簬EJB鐨凧2EE欏圭洰錛岀粡甯擱渶瑕佸湪瀹㈡埛绔笌鏈嶅姟鍣ㄧ浼犺緭澶ч噺鏁版嵁銆傛暟鎹殑緇勭粐褰㈠紡甯哥敤鐨勬槸DTO(Data Transfer Object錛屾湇鍔″櫒绔暟鎹璞＄殑鎶借薄)銆備絾鍥犱負瀹㈡埛绔〃鐜板眰緇忓父鏄彉鍖栫殑錛屾墍闇瑕佹湇鍔″櫒绔暟鎹篃鍙樺姩棰戠箒錛屾崲鍙ヨ瘽璇達紝DTO鐨勬暟閲忓拰灞炴х粡甯歌鏇存敼銆傚洜姝ゅ浣曚互鍙婂湪浣曞鐢熸垚鍜岀淮鎶TO渚挎槸闇瑕佽冭檻鐨勯棶棰樸?BR>涓縐嶈В鍐蟲柟妗堟槸鐩存帴鍦‥ntity EJB涓洿鎺ュ鐞嗭紝鍗沖湪Entity EJB鐨凚ean綾諱腑鍔犲叆getXXXDTO()銆乻etXXXDTO()絳夈備絾榪欐牱鍋氬鑷碋JB涓嶥TO灞傜揣绱х粦瀹氥備竴鏃TO鏇存敼錛屼笌璇TO鐩稿叧鐨凟JB鍗抽渶瑕侀噸緙栬瘧鎵撳寘銆侲JB灞備笌瀹㈡埛绔眰鐩稿叧鑱斾笉浠呬嬌緇存姢鍥伴毦鑰屼笖瀵艱嚧EJB鐨勯噸鐢ㄦуぇ澶ч檷浣庛?BR>鏇村ソ鐨勮В鍐蟲柟妗堟槸鍒╃敤Data Transfer Object Factory灝佽瀵笵TO鐨勬搷浣滈昏緫錛堝涓嬪浘錛栵級銆?BR>
鍥撅紪錛欴TO Factory紺轟緥
DTO Factory鍏蜂綋瀹炵幇鏂瑰紡閫氬父鏈変袱縐嶏細
錛戯紟 鏅欽ava Class瀹炵幇錛岀敤浜嶴ession Facade Pattern浣跨敤DTO鐜涓嬨?BR>錛掞紟 Stateless Session EJB瀹炵幇錛岀敤浜庨潪EJB瀹㈡埛绔嬌鐢―TO鐜涓嬶紙瑙佸浘錛楋級銆?BR>
鍥撅紬錛歋essionEJB瀹炵幇DTOFactory
DTO Factory甯︽潵濡備笅濂藉錛?BR>錛戯紟 浣縀ntity EJB鐨勯噸鐢ㄦ垚涓哄彲鑳姐傜敱浜庝笉鍚獶TO澶勭悊閫昏緫錛孍ntity EJB鍔熻兘鍗曚竴鍖栵紝鍙綔涓烘暟鎹簮銆備笉閫氬鎴風閫氳繃鍚勮嚜鐨凞TO Factory鍙互浠庡悓涓涓狤ntity EJB寰楀埌鍚勮嚜鎵闇鐨勪釜鎬у寲鏁版嵁錛堣嚜瀹氫箟DTO錛夈?BR>錛掞紟 鎻愰珮鍙淮鎶ゆу拰鎬ц兘銆?BR>錛擄紟 鍙互鏍規嵁鍦―TO Factory灞傜敓鎴愬緢澶嶆潅鐨凞TO緇撴瀯錛岃濡傜戶鎵褲佸叧鑱斿叧緋葷瓑錛岃屽瀹㈡埛绔彁渚涗竴涓忔槑銆佺粏鍖栫殑鏁版嵁鎺ュ彛銆?BR>銆銆銆浣跨敤DTO Factory鏃墮渶瑕佹敞鎰忕殑鏄細涓嶉渶涓烘瘡涓狤ntity EJB瀹氫箟涓涓狥actory銆傚彲浠ヤ負涓緋誨垪鐩稿叧鐨凟ntity EJB鍒涘緩涓涓狥actory錛屾垨鑰呭彧鍒涘緩涓涓狥actory銆?/P>
Generic Attribute Access
浣跨敤Entity EJB浣滀負鍟嗕笟鏁版嵁灞傛椂錛屾垜浠鍏堥渶瑕佷粠鏁版嵁搴撳姞杞芥暟鎹紝鍒涘緩瀵瑰簲鐨凟ntity EJB瀹炰緥錛屼箣鍚庡鍐呭瓨涓璄ntity EJB瀹炰緥鐨勫睘鎬ц繘琛岀浉搴旀搷浣溿傚灞炴х殑鎿嶄綔姣旇緝鐩存帴鐨勫仛娉曟槸錛氱洿鎺ヨ皟鐢‥ntity EJB鐨刧etXXX()/setXXX()錛岄氬父鍒╃敤EJB2.0鐨勬湰鍦版帴鍙ｏ紱閫氳繃DTO Factory鐢熸垚DTO銆備絾榪欎袱縐嶅仛娉曢兘瀛樺湪濡備笅闂錛?BR>錛戯紟 褰揈ntity EJB鐨勫睘鎬х壒鍒鏃跺欙紝浠ヤ笂鍋氭硶浼氬甫鏉ュ鏉傜綏鍡︾殑浠ｇ爜錛屼嬌EJB鍙樼殑搴炲ぇ鏃犳瘮銆?BR>錛掞紟 浣縀ntity EJB鐨勫鎴風錛堟瘮濡係ession EJB錛夊拰Entity EJB鐨勬帴鍙ｇ揣瀵嗗叧鑱斻侲ntity EJB灞炴х殑澧炲垹閮介渶瑕佹洿鏀瑰鎴風浠ｇ爜錛岀粰欏圭洰寮鍙戝拰緇存姢甯︽潵涓嶄究銆?BR>浜嬪疄涓婂彲浠ュ埄鐢ㄦ洿閫氱敤鐨勬柟寮忚闂瓻ntity EJB鐨勫睘鎬э紝鍗沖畾涔塆eneric Attribute Access Interface銆傝涓嬪浘錛橈細
銆鍥撅紭錛欸eneric Attribute Access Interface紺轟緥
Generic Attribute Access Interface鐢盓ntity EJB鐨勬湰鍦版垨榪滅▼鎺ュ彛瀹炵幇錛屽茍鍒╃敤Hash Maps浼犺緭鏁版嵁銆傚疄鐜版柟寮忓父瑙佸涓嬶細
錛戯紟 BMP綾誨瀷瀹炰綋EJB鍙互鍦˙ean綾諱腑瀹氫箟鍖呭惈鎵鏈夊睘鎬х殑縐佹湁鎴愬憳鍙橀噺HashMap銆?BR>錛掞紟 CMP綾誨瀷瀹炰綋EJB鍙互鍦˙ean綾諱腑鍙互閫傜敤Java Reflection API瀹炵幇銆?BR>錛擄紟 寤虹珛涓涓埗綾伙紝鍦ㄤ笉鍚岀殑鎯呭喌涓嬪畾涔夊瓙綾婚噸杞界埗綾繪柟娉曘?BR>浣跨敤Generic Attribute Access Interface闇瑕佸湪瀹㈡埛绔笌鏈嶅姟鍣ㄧ瀵瑰睘鎬т互鍙婂搴旂殑鍏抽敭瀛楀緩绔嬬粺涓鐨勫懡鍚嶄範鎯傚父瑙佺殑鍋氭硶濡備笅錛?BR>錛戯紟 寤虹珛騫朵繚鎸佽壇濂界殑鏂囨。璁板綍鍜屽懡鍚嶇害瀹氥?BR>錛掞紟 鍦ㄥ疄浣揈JB鐨勫疄鐜扮被涓畾涔夐潤鎬佹垚鍛樻槧灝勫睘鎬с?BR>錛擄紟 鍒涘緩鍏變韓闈欐佺被錛岄氳繃鎴愬憳鍙橀噺鏄犲皠瀹炰綋EJB灞炴с?BR>錛旓紟 閫氳繃JNDI鍦ㄦ湇鍔″櫒绔繚瀛樺睘鎬ф槧灝勫叧緋匯?BR>Generic Attribute Access Interface鐨勮繍鐢ㄥ甫鏉ヤ竴涓嬬泭澶勶細
錛戯紟 鎺ュ彛瀹炵幇鍚庡涓嶉氬疄浣揈JB閮介傜敤銆?BR>錛掞紟 瀵瑰睘鎬ц緝澶氬疄浣揈JB鑳界簿綆浠ｇ爜錛屽茍鏇村叿緇存姢鎬с?BR>錛擄紟 浣胯繍琛屼腑鍔ㄦ佸鍒犲疄浣揈JB灞炴ф垚涓哄彲鑳姐?BR>Generic Attribute Access Interface鐨勭己鐐瑰湪浜庯細
錛戯紟 璁塊棶EJB灞炴ф椂澧炲姞浜嗛澶栫殑鎿嶄綔銆傞渶瑕侀氳繃鍏抽敭瀛楁槧灝勫睘鎬э紝鏈鍚庤繕闇榪涜綾誨瀷杞崲銆?BR>錛掞紟 闇瑕佸緩绔嬪鎴風涓庢湇鍔″櫒绔殑鍛藉悕綰﹀畾銆?
錛擄紟 鍥犱負閫氳繃HashMap鎿嶄綔鏃跺欓渶瑕佽繘琛岀被鍨嬭漿鎹紝瀹規槗浜х敓榪愯鏃剁被鍨嬩笉鍖歸厤寮傚父銆?/P>
Business Interface
EJB瑙勮寖瑕佹眰Bean瀹炵幇綾誨繀欏誨疄鐜版墍鏈夊湪榪滅▼錛堟垨鏈湴錛夋帴鍙ｄ腑瀹氫箟鐨勬墍鏈夋柟娉曪紝鍚屾椂涓嶅厑璁窧ean瀹炵幇綾葷洿鎺ョ戶鎵胯繙紼嬶紙鎴栨湰鍦幫級鎺ュ彛銆傝繖灝卞鑷寸紪璇戞椂鍊欏緢瀹規槗浜х敓涓よ呬笉涓鑷寸殑闂錛屽嵆榪滅▼錛堟垨鏈湴錛夋帴鍙ｄ腑瀹氫箟鐨勬煇鏂規硶涓哄湪Bean瀹炵幇綾諱腑琚疄鐜扮瓑閿欒銆備負閬垮厤涓婅瘔閿欒錛屽彲浠ュ埄鐢ㄥ簲鐢ㄦ湇鍔″櫒鍘傚晢鎵鎻愪緵鐨勫伐鍏楓備絾涔熷彲浠ュ簲鐢‥JB鐨勮璁℃灦鏋勬潵瀹炵幇錛氬畾涔夊晢涓氭帴鍙ｃ?BR>Business Interface鍗沖垱寤鴻嚜瀹氫箟鍟嗕笟鎺ュ彛錛屽湪鎺ュ彛涓畾涔夋墍鏈塃JB鎻愪緵鐨勫晢涓氭柟娉曪紝騫惰Bean瀹炵幇綾誨拰榪滅▼錛堟垨鏈湴錛夋帴鍙ｉ兘瀹炵幇璇ュ晢涓氭帴鍙ｃ傚叾緇ф壙鍏崇郴瑙佷笅鍥撅紮錛?BR>
鍥撅紮錛氬晢涓氭帴鍙ｇ殑浣跨敤
Business Interface鏄釜鏅氱殑Java Class銆備緷璧栦簬浣跨敤鏈湴鎺ュ彛涓庤繙紼嬫帴鍙ｇ殑涓嶉氾紝Business Interface鐨勫畾涔夌暐鏈変笉鍚岋細搴旂敤涓庤繙紼嬫帴鍙ｆ椂錛屽湪鎺ュ彛涓殑鏂規硶闇瑕佹姏鍑簀ava.rmi.RemoteException錛涜屽簲鐢ㄤ笌鏈湴鎺ュ彛鏃跺欏垯涓嶉渶瑕佷綔浠諱綍鐗瑰埆澶勭悊銆?BR>搴旂敤Business Interface鏃跺欏繀欏繪敞鎰忎竴鐐癸細EJB瑙勮寖涓嶅厑璁哥洿鎺JB鐨勫疄渚嬪皢瀵硅嚜宸辯殑寮曠敤錛坱his瀵硅薄錛夎繑鍥炵粰瀹㈡埛绔紝鍚﹀垯緙栬瘧鏃跺欏嵆鎶ラ敊銆備絾浣跨敤Business Interface鍚庯紝緙栬瘧鏃跺欐棤娉曟鏌ュ嚭鏈夋棤灝唗his瀵硅薄榪斿洖緇欏鎴風銆傝繖涓鐐歸渶瑕佺▼搴忓憳鑷繁淇濊瘉銆?/P>
涓夛紟 鍐呴儴鏁版嵁杞崲絳栫暐
Data Transfer Object
鍩轟簬EJB鐨凧2EE澶氬眰鏋舵瀯搴旂敤涓紝緇忓父娑夊強鐨勪竴涓棶棰樺氨鏄浣曞湪鍚勫眰涔嬮棿浼犻掓壒閲忔暟鎹紝姣斿瀹㈡埛绔鏈嶅姟鍣ㄧ鏁版嵁鐨勬壒閲忚鍐欐搷浣滅瓑銆傛瘮濡傞渶瑕佸緱鍒板疄浣揈JB鐨勫睘鎬э紝鐩存帴鐨勬柟娉曟槸澶氭璋冪敤涓嶉氱殑灞炴э紝濡備笅鍥撅紤錛愶細
鍥撅紤錛愶細浣庢晥鐨勬暟鎹紶閫掓柟寮?BR>銆銆浣嗚繖縐嶆柟娉曞鏄撳鑷磋澶氶棶棰橈紝姣斿鎬ц兘浠ュ強浠ｇ爜鐨勫鏉傚害絳夛紝鏇存湁鏁堢殑鍔炴硶鏄湪涓涓皟鐢ㄤ腑寰楀埌鎵鏈夐渶瑕佺殑灞炴с傛墍浠ュ彲浠ュ紩鍏ata Transfer Object鏉ュ皝瑁呮墍闇瑕佺殑灞炴э紝騫跺湪瀹㈡埛涓庢湇鍔″櫒绔氳繃浼犻掕瀵硅薄涓嬈″疄鐜板鏁版嵁鐨勬搷浣溿傚涓嬪浘錛戯紤錛?BR>
銆鍥撅紤錛戯細閫氳繃DTO浼犻掓暟鎹?BR>銆銆
DTO涓烘櫘閫氱殑Java Class錛岄氬父鏄湇鍔″櫒绔暟鎹殑蹇収銆傜敱浜庣綉緇滀紶杈撶殑闇瑕侊紝DTO搴旇瀹炵幇java.io.Serializable鎺ュ彛銆?BR>DTO鐨勮璁℃湁涓ょ妯″瀷錛欴omain DTO浠ュ強Custom DTO銆?BR>Domain DTO浠呬粎瀹炵幇瀵規湇鍔″櫒鏁版嵁鐨勬嫹璐濓紝閫氬父涓庡疄浣揈JB涓轟竴瀵逛竴鐨勫叧緋?涔熷瓨鍦ㄤ負澶氫釜鐩稿叧鑱旂殑瀹炰綋EJB瀵瑰簲涓涓狣omain DTO)銆侱omain DTO閫氬父闄ょ敤浜庤鍙栨洿鏀瑰疄浣揈JB灞炴у涔熷彲鐢ㄤ簬鍒涘緩瀹炰綋EJB鏃跺欍傚疄浣揈JB涓嶥omain DTO瀵瑰簲鍏崇郴濡備笅鍥撅紤錛掞細
銆鍥撅紤錛掞細Account EJB 涓庛Account DomainDTO
Domain DTO鐨勫簲鐢ㄩ櫎浜咲TO鎵鍏鋒湁鐨勪竴鑸紭鐐瑰錛岃繕鏈夊埆鐨勭泭澶勶細
錛戯紟 寮鍙戣繀閫熴傚洜涓轟竴鏃﹀疄浣揈JB璁捐濂藉悗錛屽緢瀹規槗杞崲寰楀埌Domain DTO銆?BR>錛掞紟 鍙互鍒╃敤Domain DTO鐨剆etXXX()鏂規硶鍦ㄥ鎴風榪涜灞炴ф湁鏁堟ф晥楠屻?BR>Domain DTO鐨勭己鐐規湁錛?BR>錛戯紟 瀹㈡埛绔粦瀹氫簡鏈嶅姟鍣ㄧ鏁版嵁妯″瀷錛屼笉鍒╀簬緇存姢銆?BR>錛掞紟 涓嶅鐏墊椿錛屾棤娉曞鐞嗗鎴風鐨勫鏍峰寲鏁版嵁瑕佹眰銆傚涓涓暟鐧句釜灞炴х殑瀹炰綋EJB璇鋒眰涓涓睘鎬ф椂鍊欏嵈榪斿洖涓涓寘鍚墍鏈夊睘鎬у肩殑Domain DTO鏄庢樉鏄閲嶇殑瀹炵幇銆?BR>錛擄紟 瀵艱嚧浠ｇ爜鐨勯噸澶嶃?BR>錛旓紟 Domain DTO涓鏋滃祵濂楀寘鍚簡鍒殑Domain DTO鏃訛紝涓鏃﹂渶鏈嶅姟鍣ㄧ鏁版嵁鐨勬洿鏀硅岄渶瑕侀噸瀹氫箟Domain DTO妯″瀷鏃跺欏紓甯稿洶闅俱?/P>
Custom DTO鍒欏彲浠ュ厠鏈嶄笂榪扮殑涓浜涚己鐐廣侰ustomer DTO浠呬粎灝佽鐢ㄦ埛鎰熷叴瓚ｇ殑鏈嶅姟鍣ㄦ暟鎹泦鍗沖彲浠ユ牴鎹鎴風闇姹傚垱寤篊ustomer DTO銆傝繖鏍蜂綔鐨勪紭鐐規槸鐏墊椿楂樻晥錛涚己鐐規槸澶ч」鐩腑鍙兘瀵艱嚧澶ч噺鐨凜ustomer DTO瀛樺湪銆?BR>閫氬父Domain DTO鍙互鐢ㄤ簬鏁版嵁鐨勬洿鏂頒笌鍒涘緩錛汣ustomer DTO鍙互鐢ㄤ簬瀹㈡埛鐢ㄤ簬琛ㄧ幇灞傜殑鏁版嵁璇誨彇銆備袱鑰呭彲浠ョ浉杈呯浉鎴愩傝屼笖浣跨敤DTO涓鑸笌DTO Factory鍚屾椂浣跨敤銆?/P>
Domain Transfer Hash Map
銆銆DTO鐨勪嬌鐢ㄥ線寰緙轟箯閫氱敤鎬с備笉閫氱殑鐢ㄦ埛妗堜緥闇瑕佸垱寤轟笉鍚岀殑DTO銆傚綋欏圭洰寰堝鏉傛椂錛屼粠緇存姢鎬ц冭檻闇瑕佹洿濂界殑鏁版嵁浼犺緭鐨勫疄鐜版柟寮忋?
Domain Transfer Hash Map鍗沖埄鐢℉ashMap浣滀負瀹㈡埛鎵闇鏁版嵁闆嗙殑灝佽銆傚ソ澶勬槸錛?BR>錛戯紟 鑹ソ鐨勭淮鎶ゆс?BR>錛掞紟 杈冨ぇ鐨勯氱敤鎬с備笉鍚岀殑瀹㈡埛绔彲浠ヤ嬌鐢ㄧ浉鍚岀殑鏁版嵁浼犻掓柟寮忋?BR>緙虹偣鏄細
錛戯紟 闇瑕佺淮鎶ゅ鎴風涓庢湇鍔″櫒绔湪灞炴у強鍏跺搴斿叧閿瓧鐨勬槧灝勫叧緋匯?BR>錛掞紟 褰撻渶瑕佷嬌鐢ㄥ熀鏈被鍨嬬殑鏁版嵁鏃跺欙紝鍥犱負Hash Map鐨勯檺鍒跺繀欏誨皢鍩烘湰綾誨瀷鍏堣漿鎹㈡垚瀵硅薄銆?BR>錛擄紟 浣跨敤寰楀埌鐨勬暟鎹椂錛岄渶瑕佽繘琛岀被鍨嬪己鍒惰漿鎹€?/P>
Data Transfer RowSet
褰撻渶瑕佸鐞嗙洿鎺ョ殑JDBC璋冪敤寰楀埌鐨勭粨鏋滈泦鏃訛紝鏄劇劧鐢―TO/Hash Map宸茬粡涓嶅悎閫傦紝鍥犱負闇瑕佸澶ч噺鏁版嵁榪涜綾誨瀷杞崲絳夐澶栨搷浣滄槸寰堣垂璧勬簮鍜屼笉蹇呰鐨勶紝鑰屼笖鏈緇堢敤鎴峰父闇瑕佷互琛ㄦ牸寮忔牱鏄劇ず鏁版嵁銆?
鎵浠ュ浜岀淮琛ㄥ紡鏁版嵁錛屾洿濂界殑澶勭悊鏂瑰紡鏄埄鐢―ata Transfer RowSet銆侱ata Transfer RowSet閫氳繃灝哛esultSet鐩存帴杞崲涓篟owSet浼犻掔粰瀹㈡埛绔?BR>鍦⊿ession EJB涓嬌鐢≧owSet鐨勪竴孌電ず渚嬩唬鐮佸涓嬪浘錛戯紦錛?BR>
鍥撅紤錛擄細浣跨敤RowSet
浣跨敤RowSet鐨勫ソ澶勫緢澶氾細
錛戯紟 鎺ュ彛閫氱敤浜庡悇鏍風殑鏁版嵁搴撴煡璇㈡搷浣溿?BR>錛掞紟 褰撻渶瑕佽〃鏍煎紡鏁版嵁鏄劇ず鏃訛紝鍥犱負鐩存帴浠嶳esultSet寰楀埌錛屾墍浠ヤ笉闇瑕侀澶栫殑鏁版嵁綾誨瀷杞崲銆?BR>緙虹偣鏄細
錛戯紟 鏁版嵁搴撶粨鏋勬毚闇茬粰瀹㈡埛绔?BR>錛掞紟 涓嶇鍚堥潰鍚戝璞¤璁℃濇兂銆?BR>錛擄紟 渚濊禆浜嶴QL銆?BR>Data Transfer RowSet閫氬父鐢ㄤ簬鍙寮忔暟鎹殑鏄劇ず鎿嶄綔錛岀粡甯稿拰JDBC for Reading Pattern榪炵敤銆?/P>
鍥涳紟浜嬪姟鍜屾暟鎹寔涔呮満鍒?/P>
銆銆JDBC for Reading Pattern
鍩轟簬EJB鐨凧2EE搴旂敤涓紝閫氳繃EJB瀵規暟鎹簱鐨勬搷浣滃彲浠ユ湁涓ょ鏂瑰紡錛氬疄浣揈JB鎴栬匰ession EJB涓洿鎺ュ埄鐢↗DBC璁塊棶銆?BR>瀹㈡埛寰堝鏃跺欏彇鍑烘暟鎹簱涓暟鎹茍浠ヨ〃鏍兼柟寮忔樉紺恒傝繖縐嶆儏褰㈠鏋滀嬌鐢ㄥ疄浣揈JB浼氬鑷村涓嬮棶棰橈細
錛戯紟 寮曠敤鏈嶅姟鍣ㄧ棰戠箒鐨勬暟鎹簱鏌ヨ鍜屽姞杞芥搷浣溿傚洜涓哄姞杞絅涓疄浣揈JB鎬婚渶瑕佽繘琛屼竴嬈ind()鎿嶄綔銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆銆N嬈℃暟鎹姞杞姐?BR>錛掞紟 濡傛灉浣跨敤Remote鎺ュ彛錛屽紩璧烽綣佺殑棰濆緗戠粶鎿嶄綔銆?BR>錛擄紟 瀵瑰叧鑱斿叧緋繪瘮杈冨鏉傜殑鏁版嵁搴撹〃緇撴瀯錛屽緢闅劇洿鎺ラ氳繃Entity EJB琛ㄧ幇銆?BR>鍥犳寤鴻鍦ㄥ彧闇瀵規暟鎹簱琛ㄦ暟鎹繘琛屽彧璇昏闂椂鍊欙紝搴旇閲囩敤JDBC for Reading Pattern錛屽嵆閫氳繃JDBC鐩存帴璁塊棶鏁版嵁搴撱傞櫎浜嗛伩鍏嶄笂榪頒嬌鐢ㄥ疄浣揈JB鐨勭己鐐硅繕甯︽潵涓涓嬪ソ澶勶細
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