銆銆鐢寵榪欎釜blog寰堥暱鏃墮棿浜嗭紟涓鐩存病鏈夋満浼?xì)鍙戠偣甯栧瓙锛堜竴鐩存兂鍐欑偣鑷繁鐨勪笢瑗匡紝浣嗘槸娌℃湁鑳芥壘鍒板悎閫傜殑涓婚錛夛紟浠婂ぉ琚悓浜?鍢茬瑧浜嗕竴鐩?錛庨偅灝辨潵鍚э紝鐣欎笅鐐瑰嚭娌¤繃鐨勭棔榪癸紟
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灝忚: J2EE欏圭洰 緙栫爜璋冧紭
銆銆鐪間笅寰堝j2ee欏圭洰鎬ц兘涓嶄匠鐨勪富瑕佺摱棰堝茍涓嶆槸鍙戠敓鍦ㄧ紪鐮侊紟浣嗘槸鏃犺皳鐨勭郴緇熷紑閿錛岀籂緙犱笉娓咃紝楗舵潵楗跺幓鐨勪笟鍔￠昏緫錛庤繖浜涢兘鏄彲浠ラ伩鍏嶇殑錛庡彲鑳芥瘡涓涓▼搴忓憳閮藉笇鏈涜嚜宸辮兘鍐欏嚭楂樻晥鐨勶紝婕備寒鐨勪唬鐮佸惂錛庤嚦灝戞垜鏄甫鐫榪欑偣鎯蟲硶錛屽紑濮嬪姹傝В鍐沖姙娉曠殑錛庯紟錛?BR>
銆涓嬮潰鐨勯儴鍒嗗唴瀹規(guī)槸閽堝瀹為檯欏圭洰涓亣鍒扮殑鎯呭喌錛庝婦渚嬩竴浜涗緥瀛愶紝鍙槸涓轟簡鏇村ソ鐨勮〃杈懼兊紜殑鎻忚堪錛?/P>
銆1) 閬垮厤瀵硅薄鐨勯噸澶嶅垱寤?/P>
銆銆鈻?瀵硅薄鐨勫垱寤哄浜庣郴緇熷唴瀛樿岃█鏄潪甯告槀璐電殑.鍦ㄩ潪蹇呰鐨勬椂鍊欏簲璇ラ伩鍏嶉噸澶嶅垱寤哄璞?闇瑕佺殑鏃跺欏０鏄庡畠,鍒濆鍖栧畠,涓嶈閲嶅鍒濆鍖栦竴涓璞?灝介噺
銆銆銆鑳藉仛鍒板啀浣跨敤,鑰岀敤瀹屽悗緗畁ull鏈夊埄浜庡瀮鍦炬敹闆嗐?BR>
銆銆 姣斿: request.getSession().removeAttribute("XXXX_XXXX");
銆銆銆銆銆銆................................................ ;
銆銆銆淇敼: HttpSession obj = request.getSession();
銆銆銆銆銆銆obj.removeAttribute("XXXX_XXXX");
銆銆銆銆銆銆............................... ;
銆銆銆銆銆銆obj = null;
銆銆鈻?閬垮厤鏂規(guī)硶鐨勯潪蹇呰閲嶅璋冪敤
銆銆銆銆姣斿:
銆銆銆銆銆銆for(int i=0;i
銆銆銆銆銆銆int size = obj.size();
for(int i=0;i
銆銆鈻?璁╃被瀹炵幇Cloneable鎺ュ彛,鍚屾椂閲囩敤宸ュ巶妯″紡,灝嗗噺灝戠被鐨勫垱寤?姣忔閮芥槸閫氳繃clone()鏂規(guī)硶鏉ヨ幏寰楀璞°?BR>銆銆鈻?鍙﹀浣跨敤鎺ュ彛涔熻兘鍑忓皯綾葷殑鍒涘緩
銆銆鈻?瀵逛簬鎴愬憳鍙橀噺鐨勫垵濮嬪寲涔熷簲灝介噺閬垮厤,鐗瑰埆鏄湪涓涓被媧劇敓鍙︿竴涓被鏃?
2) 浣跨敤鍚堥傜殑綾誨瀷
銆銆銆褰撳師濮嬬被鍨嬩笉鑳芥弧瓚蟲垜浠姹傛椂,浣跨敤澶嶆潅綾誨瀷銆係tring鍜孲tringBuffer鐨勫尯鍒嚜涓嶅繀璇翠簡,鏄垜浠嬌鐢ㄦ渶澶氱殑綾誨瀷,鍦ㄦ秹鍙?qiáng)鍒板瓧绗q愮畻鏃?寮虹儓寤鴻浣?BR>銆 鐢⊿tringBuffer銆傚湪鍋歋tring鍖歸厤鏃朵嬌鐢╥ntern()浠ｆ浛equal().
+--------------------------------------------------------------
| 銆鍏充簬 public native String intern() :
| 銆榪斿洖涓涓瓧絎︿覆瀵硅薄鐨勮鑼冭〃紺烘硶銆?
|銆銆濡傛灉 s 鍜?t 鏄?s.equals(t) 綾誨瀷鐨勫瓧絎︿覆錛岄偅灝變繚璇佷簡銆s.intern() == t.intern()
|銆榪斿洖:
| 銆銆涓涓悓璇ュ瓧絎︿覆鍐呭鐩稿悓鐨勫瓧絎︿覆錛屼絾鏄潵鑷簬鍞竴瀛楃涓茬殑緙撳啿姹?BR> +-----------------------------------------------------------------
3) 甯哥敤瀹瑰櫒鐨勯夋嫨
銆銆ArrayList鍜孷ector,HashMap鍜孒ashtable鏄垜浠粡甯哥敤鍒扮殑綾?鍓嶈呬笉鏀寔鍚屾,鍚庤呮敮鎸佸悓姝?鍓嶈呮ц兘鏇村ソ,澶у鏁版儏鍐典笅閫夋嫨鍓嶈?/P>
4) final 鐨勪嬌鐢?BR> 銆甯︽湁final淇グ絎︾殑綾繪槸涓嶅彲媧劇敓鐨? 濡傛灉鎸囧畾涓涓被涓篺inal錛屽垯璇ョ被鎵鏈夌殑鏂規(guī)硶閮芥槸final,Java緙栬瘧鍣ㄤ細(xì)瀵繪壘鏈轟細(xì)鍐呰仈鎵鏈夌殑final鏂規(guī)硶,
銆榪欏皢鑳藉浣挎ц兘騫沖潎鎻愰珮50%銆傜被鐨勫睘鎬у拰鏂瑰紡 浣跨敤final鎴栬卻tatic淇グ絎︿篃鏄湁濂藉鐨?浣嗘槸涓瀹氳鎱庣敤錛屽浠栫殑浣跨敤闇瑕佸仛鎬ц兘鍜屽悗
銆鏋滄潈琛★紟
寤鴻InitXxxAction涓?闇瑕佹嬁涓浜沺arameter鐨勬椂鍊欏彲浠ュ啓鎴恌inal鐨?灝忔柟娉曪紓錛?BR> 姣斿:
銆private final WebForward retrieveParam(WebActionMapping mapping,HttpServletRequest request){
// TODO....
銆}
錛曪級璋冪敤鏂規(guī)硶鏃朵紶閫掔殑鍙傛暟浠ュ強(qiáng)鍦ㄨ皟鐢ㄤ腑鍒涘緩鐨勪復(fù)鏃跺彉閲忛兘淇濆瓨鍦ㄦ爤錛圫tack錛変腑錛岄熷害杈冨揩銆傛墍浠ュ敖閲忎嬌鐢ㄥ眬閮ㄥ彉閲?/P>
錛栵級涓嶈璇敤浜?寮傚父
銆 銆寮傚父鎶涘嚭瀵規(guī)ц兘涓嶅埄銆傛姏鍑哄紓甯擱鍏堣鍒涘緩涓涓柊鐨勫璞°俆hrowable鎺ュ彛鐨勬瀯閫犲嚱鏁拌皟鐢ㄥ悕涓?fillInStackTrace()鐨勬湰鍦幫紙Native錛?BR>銆銆鏂規(guī)硶fillInStackTrace()鏂規(guī)硶媯鏌ュ爢鏍堬紝鏀墮泦璋冪敤璺熻釜淇℃伅銆傚彧瑕佹湁寮傚父琚姏鍑猴紝VM灝卞繀欏昏皟鏁磋皟鐢ㄥ爢鏍堬紝鍥犱負(fù)鍦ㄥ鐞嗚繃紼嬩腑鍒涘緩浜嗕竴
銆銆涓柊鐨勫璞°傚紓甯稿彧鑳界敤浜庨敊璇鐞嗭紝涓嶈璇曞浘鐢ㄦ潵鎺у埗紼嬪簭嫻佺▼錛?/P>
錛楋級鍠勭敤璋冭瘯
鈻?浠ｇ爜涓笉瑕佺暀涓嬬‖璋冭鍙?姣斿: System.out.println()銆銆
鈻?搴旇閫夌敤鍜岄厤緗殑璋冭瘯宸ュ叿.瀹炴柦鍚庨兘搴旇鍏抽棴杈撳嚭 姣斿:log4j
鈻?灝介噺灝戠敤涓茶鍖栥佸悓姝ユ搷浣滃拰鑰楁椂鏄傝吹鐨勬湇鍔?姣斿:Date()
銆銆鏆傛椂鍐欎笅榪欎簺鍚э紒絎竴嬈″啓blog鎰熻鏈夌偣绱漢鍛紒鏈変粈涔堟柊鐨勪綋浼?xì)鍐嶈ˉ鍏?..
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