杞嚜錛歨ttp://blog.csdn.net/fenglibing/article/details/7083071
榪欑瀹炵幇鏂瑰紡錛屾劅瑙夊拰鎴戜滑閫氬父鐨勫紑鍙戞柟寮忓樊涓嶅錛岄兘鏄畾涔変竴涓帴鍙ｏ紝鐒跺悗瀛愮被瀹炵幇鐖剁被涓畾涔夌殑鏂規硶錛屼負浠涔堣鎼炶繖涔堜竴濂楁爣鍑嗕互鍙婂崟鐙悶涓涓厤緗枃浠訛紵榪欑鏂瑰紡涓昏鏄拡瀵逛笉鍚岀殑鏈嶅姟鎻愪緵鍘傚晢錛屽涓嶅悓鍦烘櫙鐨勬彁渚涗笉鍚岀殑瑙ｅ喅鏂規鍒跺畾鐨勪竴濂楁爣鍑嗭紝涓句釜綆鍗曠殑渚嬪瓙錛屽鐜板湪鐨凧DK涓湁鏀寔闊充箰鎾斁錛屽亣璁懼彧鏀寔mp3鐨勬挱鏀撅紝鏈変簺鍘傚晢鎯沖湪榪欎釜鍩虹涔嬩笂鏀寔mp4鐨勬挱鏀撅紝鏈夌殑鎯蟲敮鎸乵p5錛岃岃繖浜涘巶鍟嗛兘鏄涓夋柟鍘傚晢錛屽鏋滄病鏈夋彁渚汼PI榪欑瀹炵幇鏍囧噯錛岄偅灝卞彧鏈変慨鏀笿AVA鐨勬簮浠ｇ爜浜嗭紝閭ｈ繖涓紛绔篃鏄樉鑰屾槗瑙佺殑錛屼篃灝辨槸涓嶈兘澶熼殢鐫JDK鐨勫崌綰ц屽崌綰х幇鍦ㄧ殑搴旂敤浜嗭紝鑰屾湁浜哠PI鏍囧噯錛孲UN鍏徃鍙渶瑕佹彁渚涗竴涓挱鏀炬帴鍙ｏ紝鍦ㄥ疄鐜版挱鏀劇殑鍔熻兘涓婇氳繃ServiceLoad鐨勬柟寮忓姞杞芥湇鍔★紝閭ｄ箞絎笁鏂瑰彧闇瑕佸疄鐜拌繖涓挱鏀炬帴鍙ｏ紝鍐嶆寜SPI鏍囧噯榪涜鎵撳寘鎴恓ar錛屽啀鏀懼埌classpath涓嬮潰灝監K浜嗭紝娌℃湁涓鐐逛唬鐮佺殑渚靛叆鎬с?/span>
浠ヤ笅鏄壘鍒扮殑鍑犵瘒鏂囩珷錛?/p>
1銆?a target="_blank" style="color: #ca0000; text-decoration: none;">http://docs.oracle.com/javase/6/docs/api/java/util/ServiceLoader.html錛岃繖涓槸瀹樻柟鐨勬枃妗ｏ紝鏈夊service鐨勮緇嗕粙緇嶏紝鍖呮嫭瑙勮寖浠ュ強涓涓畝鍗曠殑紺轟緥錛岃繖涓槸瀛︿範SPI蹇呴』鐪嬬殑鏂囨。錛?/p>
娉細http://docs.oracle.com/javase/1.4.2/docs/guide/jar/jar.html#Service%20Provider錛岃繖涓槸1.4涓Service Provider鐨勪粙緇嶏紝鍔犺澆鏈嶅姟鏄氳繃sun.misc.Service榪涜鍔犺澆鐨勶紝榪欎釜涔熸湁鐩稿簲鐨勭ず渚嬶紝鐓у仛灝監K錛?/p>
2銆丣ava鐨凷PI鏈哄埗錛?a target="_blank" style="color: #ca0000; text-decoration: none;">http://www.2cto.com/kf/201012/79868.html錛岃繖涓槸鍥戒漢鍐欑殑涓綃囩ず渚嬫枃绔狅紝涔熸尯涓嶉敊錛岄噷闈篃鏈変竴涓畝鍗曠殑紺轟緥錛?/p>
3銆丏eveloping a Service Provider using Java API(Service Provider Interface)錛?a style="color: #ca0000; text-decoration: none;">http://blog.csdn.net/fenglibing/article/details/7083526錛岃繖綃囨枃绔犳槸杞殑alexa鍙戣〃鍦╞logspot涓婇潰鐨勶紝涔熸槸涓涓紑鍙慡PI鐨勭ず渚嬶紝鏈夊叴瓚ｇ殑涔熷彲浠ョ湅鐪嬶紱
4銆丄dd Mp3 capabilities to Java Sound with SPI錛?a target="_blank" style="color: #ca0000; text-decoration: none;">http://www.javaworld.com/javaworld/jw-11-2000/jw-1103-mp3.html錛岃繖鏄竴涓瘮杈冭佺殑渚嬪瓙錛屽熀浜巎dk1.3鐨勶紝鍥犱負鍦╦dk1.3鐨勬椂鍊欒繕娌℃湁鏀寔mp3鏍煎紡錛屽彧鏀寔AU, AIF, MIDI, and WAV絳夋牸寮忥紝涔熸槸涓涓煎緱鍙傝冪殑紺轟緥銆?/p>
鎴戣繖杈逛篃鍐欎簡涓涓畝鍗曞緱涓嶈兘澶熷啀綆鍗曠殑紺轟緥錛屾簮鐮佸彲浠ヨ繖閲屼笅杞斤細http://download.csdn.net/detail/fenglibing/3939882
鏈鍚庡緢閲嶈涓鐐癸細
濡傛灉鎯寵瑕嗙洊鏌愪釜Provider錛屽彲浠ュ湪瀵瑰簲鐨凪ETA-INF/services鐨勯厤緗枃浠朵腑鍔犱笂鏂皊ervice鐨勪竴琛岋紝鎴栬呬篃鍙互鍐欏湪鍙︿竴涓湁渚濊禆鍏崇郴鐨刯ar鍖呬腑錛屽彧瑕佸拰鍘熸潵鐨凱rovider鍛藉悕涓嶅悓鍗沖彲銆傚姞杞介『搴忎笂鍙互鑰冭檻浣跨敤@Priority娉ㄨВ鏉ヨ皟鏁村姞杞界殑浼樺厛綰с?/p>
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鍓嶇搴旂敤鍙傛暟閰嶇疆錛?/span>
JAVA_OPTS="-server -Xmx4096m -Xms4096m -Xmn480m -Xss256k -XX:PermSize=128m -XX:MaxPermSize=256m -XX:+UseConcMarkSweepGC -XX:ParallelGCThreads=8 -XX:CMSFullGCsBeforeCompaction=0
-XX:+UseCMSCompactAtFullCollection -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=7 -XX:GCTimeRatio=19
-Xnoclassgc -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:-CMSParallelRemarkEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:SoftRefLRUPolicyMSPerMB=0"
-XX:+UseCMSCompactAtFullCollection -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=7 -XX:GCTimeRatio=19
-Xnoclassgc -XX:+DisableExplicitGC -XX:+UseParNewGC -XX:-CMSParallelRemarkEnabled -XX:CMSInitiatingOccupancyFraction=70 -XX:SoftRefLRUPolicyMSPerMB=0"
鍙傛暟璇存槑錛?/p>
-Xmx1280m錛氳緗甁VM鏈澶у彲鐢ㄥ唴瀛樹負1280m銆傛渶澶у彲璁句負3550m銆傚叿浣撳簲鐢ㄥ彲閫傚綋璋冩暣銆?/p>
-Xms1280m錛氳緗甁VM鍒濆鍐呭瓨涓?280m銆傛鍊煎彲浠ヨ緗笌-Xmx鐩稿悓錛屼互閬垮厤姣忔鍨冨溇鍥炴敹瀹屾垚鍚嶫VM閲嶆柊鍒嗛厤鍐呭瓨銆?/p>
-Xmn480m錛氳緗勾杞諱唬澶у皬涓?80m銆傛暣涓爢澶у皬=騫磋交浠ｅぇ灝?+ 騫磋佷唬澶у皬 + 鎸佷箙浠ｅぇ灝忋傛寔涔呬唬涓鑸浐瀹氬ぇ灝忎負64m錛屾墍浠ュ澶у勾杞諱唬鍚庯紝灝嗕細鍑忓皬騫磋佷唬澶у皬銆傛鍊煎緋葷粺鎬ц兘褰卞搷杈冨ぇ錛孲un瀹樻柟鎺ㄨ崘閰嶇疆涓烘暣涓爢鐨?/8銆?/p>
-Xss256k錛氳緗瘡涓嚎紼嬬殑鍫嗘爤澶у皬銆侸DK5.0浠ュ悗姣忎釜綰跨▼鍫嗘爤澶у皬涓?M錛屼互鍓嶆瘡涓嚎紼嬪爢鏍堝ぇ灝忎負256K銆傛洿鍏峰簲鐢ㄧ殑綰跨▼鎵闇鍐呭瓨澶у皬榪涜璋冩暣銆傚湪鐩稿悓鐗╃悊鍐呭瓨涓嬶紝鍑忓皬榪欎釜鍊艱兘鐢熸垚鏇村鐨勭嚎紼嬨備絾鏄搷浣滅郴緇熷涓涓繘紼嬪唴鐨勭嚎紼嬫暟榪樻槸鏈夐檺鍒剁殑錛屼笉鑳芥棤闄愮敓鎴愶紝緇忛獙鍊煎湪3000~5000宸﹀彸銆?/p>
-XX:PermSize=64m錛氭寚瀹?jvm 涓?Perm Generation 鐨勬渶灝忓箋?榪欎釜鍙傛暟闇瑕佺湅浣犵殑瀹為檯鎯呭喌銆傚彲浠ラ氳繃jmap 鍛戒護鐪嬬湅鍒板簳闇瑕佸灝戙?/p>
-XX:MaxPermSize=128m錛氭寚瀹?Perm Generation 鐨勬渶澶у?/p>
-XX:+UseConcMarkSweepGC錛?/strong>璁劇疆騫跺彂鏀墮泦鍣?/p>
-XX:ParallelGCThreads=8錛?/strong>閰嶇疆騫惰鏀墮泦鍣ㄧ殑綰跨▼鏁幫紝鍗籌細鍚屾椂澶氬皯涓嚎紼嬩竴璧瘋繘琛屽瀮鍦懼洖鏀躲傛鍊兼渶濂介厤緗笌澶勭悊鍣ㄦ暟鐩浉絳夈?/p>
-XX:CMSFullGCsBeforeCompaction=0錛?/strong>鐢變簬騫跺彂鏀墮泦鍣ㄤ笉瀵瑰唴瀛樼┖闂磋繘琛屽帇緙┿佹暣鐞嗭紝鎵浠ヨ繍琛屼竴孌墊椂闂翠互鍚庝細浜х敓“紕庣墖”錛屼嬌寰楄繍琛屾晥鐜囬檷浣庛傛鍊艱緗繍琛屽灝戞GC浠ュ悗瀵瑰唴瀛樼┖闂磋繘琛屽帇緙┿佹暣鐞嗐?/p>
-XX:+UseCMSCompactAtFullCollection錛?/strong>鎵撳紑瀵瑰勾鑰佷唬鐨勫帇緙┿傚彲鑳戒細褰卞搷鎬ц兘錛屼絾鏄彲浠ユ秷闄ょ鐗囥?/p>
-XX:SurvivorRatio=8錛?/strong>姣忎釜survivor space 鍜?eden涔嬮棿鐨勬瘮渚嬨?/p>
-XX:MaxTenuringThreshold=7錛?/strong>璁劇疆鍨冨溇鏈澶у勾榫勩傚鏋滆緗負0鐨勮瘽錛屽垯騫磋交浠ｅ璞′笉緇忚繃Survivor鍖猴紝鐩存帴榪涘叆騫磋佷唬銆傚浜庡勾鑰佷唬姣旇緝澶氱殑搴旂敤錛屽彲浠ユ彁楂樻晥鐜囥傚鏋滃皢姝ゅ艱緗負涓涓緝澶у鹼紝鍒欏勾杞諱唬瀵硅薄浼氬湪Survivor鍖鴻繘琛屽嬈″鍒訛紝榪欐牱鍙互澧炲姞瀵硅薄鍐嶅勾杞諱唬鐨勫瓨媧繪椂闂達紝澧炲姞鍦ㄥ勾杞諱唬鍗寵鍥炴敹鐨勬鐜囥?/p>
-XX:GCTimeRatio=19錛?/strong>璁劇疆鍨冨溇鍥炴敹鏃墮棿鍗犵▼搴忚繍琛屾椂闂寸殑鐧懼垎姣旓紝鍏紡涓?/(1+n)銆?/p>
-Xnoclassgc錛?/strong>紱佺敤綾誨瀮鍦懼洖鏀訛紝鎬ц兘浼氭湁涓瀹氭彁楂樸?/p>
-XX:+DisableExplicitGC錛?/strong>褰撴鍙傛暟鎵撳紑鏃訛紝鍦ㄧ▼搴忎腑璋冪敤System.gc()灝嗕細涓嶈搗浣滅敤銆傞粯璁ゆ槸off銆?/p>
-XX:+UseParNewGC錛?/strong>璁劇疆騫磋交浠ｄ負騫惰鏀墮泦銆傚彲涓嶤MS鏀墮泦鍚屾椂浣跨敤銆?/p>
-XX:-CMSParallelRemarkEnabled錛?/strong>鍦ㄤ嬌鐢?UseParNewGC 鐨勬儏鍐典笅 , 灝介噺鍑忓皯 mark 鐨勬椂闂淬?/p>
-XX:CMSInitiatingOccupancyFraction=70錛?/strong>鎸囩ず鍦?old generation 鍦ㄤ嬌鐢ㄤ簡 70% 鐨勬瘮渚嬪悗 , 鍚姩 concurrent collector銆?/p>
-XX:SoftRefLRUPolicyMSPerMB=0錛?/strong>姣忓厗鍫嗙┖闂茬┖闂翠腑SoftReference鐨勫瓨媧繪椂闂淬?/p>
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