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如何网站全部结构,传奇购买域名做网站,公司建设网站申请,仿《爱美眉》网站 dede闈㈣瘯鐜板満锛氳阿椋炴満澶ф垬浜掕仈缃戝ぇ鍘傞潰璇曞畼 绗竴杞細Java鍩虹绡#xfffd; 闈㈣瘯瀹#xfffd;锛氳浠嬬粛涓#xfffd;涓#xfffd; HashMap 鐨勫簳灞傚疄鐜板師鐞嗭紵 璋㈤鏈#xfffd;锛氬憙鈥︹#xfffd;ashMap 鍟婏紝灏辨槸 Map 鐨…闈㈣瘯鐜板満锛氳阿椋炴満澶ф垬浜掕仈缃戝ぇ鍘傞潰璇曞畼绗竴杞細Java鍩虹绡闈㈣瘯瀹锛氳浠嬬粛涓涓 HashMap 鐨勫簳灞傚疄鐜板師鐞嗭紵璋㈤鏈锛氬憙鈥︹ashMap 鍟婏紝灏辨槸 Map 鐨勪竴绉嶏紝key-value 瀛樻暟鎹紝鎴戝钩鏃剁敤瀹冨瓨鐢ㄦ埛ID鍜屽悕瀛椼俓n闈㈣瘯瀹锛氶偅浣犵煡閬撳畠鏄庝箞瑙喅鍝堝笇鍐茬獊鐨勫悧锛焅n璋㈤鏈锛氬啿绐侊紵澶氬垱寤哄嚑涓狹ap涓嶅氨琛屼簡锛熶竴涓彨userMap1锛屼竴涓彨userMap2鈥︹n闈㈣瘯瀹锛氣︹︽垜浠户缁侫rrayList 鍜 LinkedList 鏈変粈涔堝尯鍒紵璋㈤鏈锛欰rrayList 鏄暟缁勶紝LinkedList 鏄摼琛紒鎴戠煡閬撹繖涓紒鑰屼笖 LinkedList 鐗瑰埆閫傚悎鍒犻櫎锛屽洜涓轰笉鐢ㄧЩ鍔ㄥ厓绱狅紒闈㈣瘯瀹锛堝井寰偣澶达級锛氫笉閿欙紝閭彃鍏ュ憿锛焅n璋㈤鏈锛氭彃鍏ワ紵ArrayList 鎻掍腑闂磋鎸悗闈㈡墍鏈夊厓绱狅紝鎵浠ユ參锛汱inkedList 鍙鏀规寚閽堬紝蹇紒鎴戣儗杩囧叓鑲℃枃鐨勶紒闈㈣瘯瀹锛氳繕琛屻傞偅 ArrayList 鎵╁鏈哄埗浜嗚В鍚楋紵璋㈤鏈锛氭墿瀹癸紵鍝︼紒榛樿10涓紝婊′簡灏卞彉鎴15涓紝1.5鍊嶏紒闈㈣瘯瀹锛氬棷锛岀畻浣犵瓟瀵逛簡銆俓n绗簩杞細骞跺彂缂栫▼涓嶫VM闈㈣瘯瀹锛氳璇 synchronized 鍜 ReentrantLock 鐨勫尯鍒紵璋㈤鏈锛歴ynchronized 鏄叧閿瓧锛孯eentrantLock 鏄被锛佽屼笖 ReentrantLock 鑳 tryLock锛屼笉浼氫竴鐩寸瓑锛乗n闈㈣瘯瀹锛氬緢濂姐傞偅绾跨▼姹犵殑鏍稿績鍙傛暟鏈夊摢浜涳紵璋㈤鏈锛歝orePoolSize銆乵aximumPoolSize銆亀orkQueue銆乼hreadFactory銆乭andler鈥︹︽垜鍏ㄤ細鑳岋紒闈㈣瘯瀹锛氬鏋滈槦鍒楁弧浜嗕笖绾跨▼鏁拌揪鍒 maximum锛屾柊浠诲姟浼氭庢牱锛焅n璋㈤鏈锛氶偅灏扁︹﹀紑涓柊绾跨▼锛熶笉琛屽氨绛夌瓑锛焅n闈㈣瘯瀹锛氶敊浜嗭紝浼氳Е鍙戞嫆缁濈瓥鐣ャ傛瘮濡 AbortPolicy 鐩存帴鎶涘紓甯搞俓n璋㈤鏈锛氬摝鍝︼紝閭垜椤圭洰閲屾病閰嶈繃锛岄兘鏄 Async 榛樿鐨勩俓n闈㈣瘯瀹锛氶偅浣犱簡瑙 JVM 鍚楋紵璇磋鍐呭瓨缁撴瀯銆俓n璋㈤鏈锛氭湁鍫嗐佹爤銆佹柟娉曞尯锛佸爢鏀惧璞★紝鏍堟斁鏂规硶璋冪敤锛屾柟娉曞尯鏀剧被淇℃伅锛乗n闈㈣瘯瀹锛欸C 鍛紵CMS 鍜 G1 鏈変粈涔堝尯鍒紵璋㈤鏈锛欳MS 鏄佸勾浠紝骞跺彂鏍囪娓呴櫎锛屼絾浼氱鐗囧寲锛汫1 鍛⑩︹︽槸鈥淕鈥濆紑澶寸殑锛岃繕鑳藉垎 Region鈥︹﹀埆鐨勬垜蹇樹簡銆俓n闈㈣瘯瀹锛堟壎棰濓級锛氣︹︿笅涓涓棶棰樸俓n绗笁杞細涓绘祦妗嗘灦涓庝腑闂翠欢闈㈣瘯瀹锛歋pring 涓 Bean 鐨勪綔鐢ㄥ煙鏈夊摢浜涳紵璋㈤鏈锛歴ingleton 鍜 prototype锛佸崟渚嬪拰鍘熷瀷锛佹垜杩樼煡閬 request 鍜 session锛屼絾娌敤杩囥俓n闈㈣瘯瀹锛欱ean 寰幆渚濊禆鎬庝箞瑙喅鐨勶紵璋㈤鏈锛歋pring 鎻愬墠鏆撮湶涓涓滃崐鎴愬搧鈥滲ean锛岀敤涓夌骇缂撳瓨锛佷竴绾т簩绾т笁绾э紝鍍忎粨搴撲竴鏍凤紒闈㈣瘯瀹锛堢暐鎯婅锛夛細鍡紝涓嶉敊銆傞偅 MyBatis #{} 鍜 ${} 鏈変粈涔堝尯鍒紵璋㈤鏈锛#{} 鏄缂栬瘧锛岄槻SQL娉ㄥ叆锛${} 鏄瓧绗︿覆鎷兼帴锛佹垜鍦ㄥ啓 ORDER BY 鐨勬椂鍊欑敤杩 ${}锛乗n闈㈣瘯瀹锛氬嵄闄╂搷浣滃晩銆侱ubbo 鐨勮礋杞藉潎琛瓥鐣ユ湁鍝簺锛焅n璋㈤鏈锛氶殢鏈恒佽疆璇€佹渶灏戞椿璺冩暟鈥︹︽垜璁板緱鏈変釜鍙滀竴鑷存у搱甯屸濈殑锛岀敤鏉ュ仛缂撳瓨瀹氫綅锛乗n闈㈣瘯瀹锛氳繕琛屻俁edis 鎸佷箙鍖栨満鍒讹紵璋㈤鏈锛歊DB 鏄媿蹇収锛孉OF 鏄鏃ュ織锛丄OF 鏇村畨鍏紝浣嗘枃浠跺ぇ锛乗n闈㈣瘯瀹锛歁ySQL 鐨勭储寮曞け鏁堝満鏅紵璋㈤鏈锛歭ike %寮犱笁 浼氬け鏁堬紝杩樻湁瀵瑰瓧娈靛仛鍑芥暟鎿嶄綔锛屾瘮濡 where date(create_time) 2024-01-01锛乗n闈㈣瘯瀹锛氭渶鍚庝竴涓棶棰橈細DDD 鐨勬牳蹇冩蹇垫槸浠涔堬紵璋㈤鏈锛欴DD锛熸槸鈥樻晫閮藉掆欏悧锛熷摝鍝︼紝棰嗗煙椹卞姩璁捐锛佹湁瀹炰綋銆佸煎璞°佽仛鍚堟牴鈥︹︾劧鍚庘︹︾劧鍚庢垜椤圭洰閲屾病鐢ㄨ繃锛岄兘鏄疌RUD銆俓n闈㈣瘯瀹锛堝徆姘旓級锛氬ソ鐨勶紝璋㈠厛鐢燂紝浠婂ぉ鍏堝埌杩欓噷锛屽洖鍘荤瓑閫氱煡鍚с俓n璋㈤鏈锛氬ソ鍢烇紒鎴戝洖鍘诲氨鎶婂叓鑲℃枃鍐嶈儗涓閬嶏紒绛旀璇﹁В锛氭妧鏈偣娣卞害瑙瀽1. HashMap 搴曞眰鍘熺悊HashMap 鍦 JDK 8 涓噰鐢ㄢ滄暟缁 閾捐〃 绾㈤粦鏍戔濈粨鏋勩傞氳繃 key 鐨 hashCode 璁畻 hash 鍊硷紝纭畾鏁扮粍涓嬫爣銆傚綋閾捐〃闀垮害瓒呰繃 8 涓旀暟缁勯暱搴﹀ぇ浜 64 鏃讹紝閾捐〃杞负绾㈤粦鏍戯紝鎻愬崌鏌ユ壘鏁堢巼銆傚搱甯屽啿绐侀氳繃閾惧湴鍧娉曡В鍐筹紝鍗冲悓涓涓《浣嶆寕澶氫釜鑺傜偣銆俓n2. ArrayList 鎵╁鏈哄埗榛樿鍒濆瀹归噺涓10锛屾瘡娆℃墿瀹逛负鍘熷閲忕殑1.5鍊嶏紙oldCapacity (oldCapacity 1)锛夈傛墿瀹归氳繃 Arrays.copyOf 瀹炵幇锛屾秹鍙婃暟缁勬嫹璐濓紝杈冭楁ц兘锛屽缓璁垵濮嬪寲鏃舵寚瀹氬悎鐞嗗閲忋俓n3. synchronized vs ReentrantLocksynchronized 鏄 JVM 灞傞潰鐨勪簰鏂ラ攣锛岃嚜鍔ㄩ噴鏀撅紝涓嶅彲涓柇銆俓n- ReentrantLock 鏄 API 灞傞潰鐨勫彲閲嶅叆閿侊紝闇鎵嬪姩 lock/unlock锛屾敮鎸佸叕骞抽攣銆侀潪鍏钩閿併佸彲涓柇銆佽秴鏃惰幏鍙栫瓑楂樼骇鐗规с俓n4. 绾跨▼姹犱竷澶у弬鏁癨n- corePoolSize锛氭牳蹇冪嚎绋嬫暟maximumPoolSize锛氭渶澶х嚎绋嬫暟keepAliveTime锛氶潪鏍稿績绾跨▼绌洪棽瀛樻椿鏃堕棿unit锛氭椂闂村崟浣峔n- workQueue锛氶樆濉為槦鍒梊n- threadFactory锛氱嚎绋嬪伐鍘俓n- handler锛氭嫆缁濈瓥鐣ワ紙AbortPolicy銆丆allerRunsPolicy 绛夛級5. JVM 鍐呭瓨缁撴瀯鍫嗭紙Heap锛夛細瀛樻斁瀵硅薄瀹炰緥锛孏C 涓昏鍖哄煙铏氭嫙鏈烘爤锛氬瓨鏀炬柟娉曡皟鐢ㄦ爤甯э紝灞閮ㄥ彉閲忚〃銆佹搷浣滄暟鏍堢瓑鏂规硶鍖猴紙鍏冪┖闂达級锛氬瓨鏀剧被淇℃伅銆佸父閲忋侀潤鎬佸彉閲廫n- 绋嬪簭璁℃暟鍣細璁板綍褰撳墠绾跨▼鎵ц瀛楄妭鐮佺殑浣嶇疆鏈湴鏂规硶鏍堬細涓 Native 鏂规硶鏈嶅姟6. G1 涓 CMS 鍖哄埆CMS锛氫互鏈鐭仠椤挎椂闂翠负鐩爣锛岀敤浜庤佸勾浠紝閲囩敤鈥滃垵濮嬫爣璁-骞跺彂鏍囪-閲嶆柊鏍囪-骞跺彂娓呴櫎鈥濓紝瀛樺湪纰庣墖闂銆俓n- G1锛氶潰鍚戝ぇ鍫嗭紝灏嗗爢鍒掑垎涓哄涓 Region锛屾敮鎸佸苟琛屼笌骞跺彂锛屽彲棰勬祴鍋滈】鏃堕棿锛岄氳繃 Remembered Set 瑙喅璺 Region 寮曠敤锛岄伩鍏嶅叏灞鎵弿銆俓n7. Spring Bean 寰幆渚濊禆Spring 閫氳繃涓夌骇缂撳瓨瑙喅 singleton Bean 鐨勫惊鐜緷璧栵細涓绾х紦瀛橈細singletonObjects锛屽瓨鏀惧畬鏁 Bean浜岀骇缂撳瓨锛歟arlySingletonObjects锛屽瓨鏀炬棭鏈熸毚闇茬殑 Bean锛堟湭瀹屽叏鍒濆鍖栵級涓夌骇缂撳瓨锛歴ingletonFactories锛屽瓨鏀 ObjectFactory锛岀敤浜庡垱寤轰唬鐞嗗璞n8. Redis 鎸佷箙鍖朶n- RDB锛氬畾鏃跺揩鐓э紝鎭㈠蹇紝鏁版嵁鍙兘涓㈠けAOF锛氳褰曟瘡鏉″啓鍛戒护锛屾棩蹇楄拷鍔狅紝鏁版嵁鏇村畨鍏紝鍙氳繃 rewrite 浼樺寲鏃ュ織9. MySQL 绱㈠紩澶辨晥鍦烘櫙浣跨敤鍑芥暟鎴栬繍绠楋細where year(create_time) 2024宸︽ā绯婃煡璇細like %abc绫诲瀷杞崲锛氬瓧绗︿覆瀛楁浼犳暟瀛梊n- OR 鏉′欢鏈叏閮ㄤ娇鐢ㄧ储寮昞n- 鏈宸﹀墠缂鍘熷垯鐮村潖锛氳仈鍚堢储寮 (a,b,c)锛屾煡璇㈡潯浠舵棤 a10. DDD 鏍稿績姒傚康瀹炰綋锛圗ntity锛夛細鏈夊敮涓鏍囪瘑锛岀敓鍛藉懆鏈熻繛缁璡n- 鍊煎璞★紙Value Object锛夛細鏃犳爣璇嗭紝閫氳繃灞炴у垽鏂浉绛塡n- 鑱氬悎锛圓ggregate锛夛細涓缁勭浉鍏冲璞殑闆嗗悎锛岃仛鍚堟牴璐熻矗杈圭晫鍐呯殑涓鑷存n- 棰嗗煙鏈嶅姟銆佸簲鐢ㄦ湇鍔°佷粨鍌ㄣ佷簨浠剁瓑涔熸槸閲嶈缁勬垚閮ㄥ垎鎬荤粨锛氳阿椋炴満铏界劧鏈変簺闂绛斿緱绂昏氨锛屼絾閮ㄥ垎鍩虹鎺屾彙灏氬彲銆傜湡瀹為潰璇曚腑锛岀悊瑙師鐞嗚繙姣旇儗璇垫洿閲嶈銆傚缓璁ぇ瀹舵繁鍏ュ涔犲簳灞傛満鍒讹紝缁撳悎涓氬姟鍦烘櫙鎬濊冿紝鎵嶈兘鐪熸鑴遍鑰屽嚭銆