对面的程序员赶紧看过来！布隆过滤器又有新玩法了~-博学谷野架构师

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Java銆嬩竴涔︿腑鎺ㄨ崘鐨勬彁渚涘璞＄殑鏂规硶涔嬩竴銆侰OPYenumBloomFilterStrategiesimplementsBloomFilter.Strategy{MURMUR128_MITZ_32(){//....}MURMUR128_MITZ_64(){//...}}涓よ€呭垎鍒搴?2浣嶅搱甯屾槧灏勫嚱鏁板拰64浣嶅搱甯屾槧灏勫嚱鏁帮紝浠ュ強then鍚庤€呬娇鐢╩urmur3hash鐢熸垚鐨勫叏閮?28浣嶏紝绌洪棿鏇村ぇ锛屼絾鍘熺悊鏄竴鏍风殑銆傛垜浠€夋嫨姣旇緝绠€鍗曠殑MURMUR128_MITZ_32杩涜鍒嗘瀽銆傛垜浠厛鏉ョ湅鐪嬪畠鐨刾ut鏂规硶銆傚畠浣跨敤涓や釜鍝堝笇鍑芥暟鏉ユā鎷熷涓搱甯屽嚱鏁帮紝鏄竷闅嗚繃婊ゅ櫒鐨勪竴绉嶄紭鍖栥€俻utmethodCOPYpublicbooleanput(Tobject,Funnelfunnel,intnumHashFunctions,BitArraybits){longbitSize=bits.bitSize();}//棣栧厛浣跨敤murmur3hash璁＄畻杈撳叆funnel寰楀埌128浣嶇殑hash鍊硷紝funnel鐜板湪灏唎bject杞崲涓哄瓧鑺傛暟缁勶紝//鐒跺悗浣跨敤hash鍑芥暟灏嗗叾杞崲涓簂onglonghash64=Hashing.murmur3_128().hashObject(瀵硅薄锛屾紡鏂楋級.asLong();//鏍规嵁鍝堝笇鍊艰绠梙ash1鍜宧ash2inthash1=(int)hash64;inthash2=(int)(hash64>>>32);甯冨皵浣嶅凡鏇存敼=false锛?/鍦ㄥ惊鐜綋涓敤涓や釜鍑芥暟妯℃嫙鍏朵粬鍑芥暟鐨勬€濊矾鐩稿綋姣忔绱姞hash2for(inti=1;i<=numHashFunctions;i++){intcombinedHash=hash1+(i*hash2);//濡傛灉鏄礋鏁帮紝鍒欏彉涓烘鏁癷f(combinedHash<0){combinedHash=~combinedHash;}//鏍规嵁bitSize鍙栨ā寰楀埌浣嶆暟缁勪腑鐨勭储寮曪紝鐒跺悗璋冪敤set鍑芥暟杩涜璁剧疆銆俠itsChanged|=bits.set(combinedHash%bitSize);}returnbitsChanged;}鍦╬ut鏂规硶涓紝鍏堝皢绱㈠紩浣嶇疆鐨勪簩杩涘埗鏁拌缃负1锛岀劧鍚庝娇鐢╞itsChanged璁板綍鎻掑叆缁撴灉銆傚鏋滆繑鍥瀟rue锛岃鏄庢病鏈夐噸澶嶆彃鍏ユ垚鍔燂紝鑰宮ightContain鏂规硶灏辨槸鍙栧嚭绱㈠紩浣嶇疆鐨勫€硷紝鍒ゆ柇鏄惁涓?锛屽彧瑕侀噷闈㈡湁涓€涓?锛屽氨绔嬪嵆鍒ゆ柇涓轰笉瀛樺湪鐨勩€俶ightContain鏂规硶COPYpublicbooleanmightContain(Tobject,Funnelfunnel,intnumHashFunctions,BitArraybits){longbitSize=bits.bitSize();longhash64=Hashing.murmur3_128().hashObject(object,funnel).asLong();inthash1=(int)hash64;inthash2=(int)(hash64>>>32);for(inti=1;i<=numHashFunctions;i++){intcombinedHash=hash1+(i*hash2);//濡傛灉瀹冩槸璐熸暟锛堜繚璇佹鏁帮級鍒欑炕杞墍鏈変綅if(combinedHash<0){combinedHash=~combinedHash;}//put鍜宲ut鐨勫尯鍒氨鍦ㄨ繖閲岋紝浠巗et鍒囨崲鍒癵et鍒ゆ柇鏄惁瀛樺湪if(!bits.get(combinedHash%bitSize)){returnfalse;}}returntrue;}涓轰簡鎻愰珮鏁堢巼锛孏uava瀹炵幇浜哃ockFreeBitArray锛屾彁渚涗綅鏁扮粍鐨勬棤閿佽缃拰璇诲彇銆傛垜浠彧鐪嬩竴涓嬪畠鐨刾ut鍑芥暟銆侰OPYbooleanset(longbitIndex){if(get(bitIndex)){杩斿洖鍋囷紱}intlongIndex=(int)(bitIndex>>>LONG_ADDRESSABLE_BITS);闀挎帺鐮?1L<<浣嶇储寮曪紱//鍙叧蹇僢itIndex鐨勪綆6浣峫ongoldValue;闀挎柊鍊硷紱//缁忓吀鐨凜AS鑷棆閲嶈瘯鏈哄埗do{oldValue=data.get(longIndex);鏂板€?鏃у€紎闈㈠叿;濡傛灉锛堟棫鍊?=鏂板€硷級{杩斿洖鍋囷紱}}while(!data.compareAndSet(longIndex,oldValue,newValue));bitCount.increment();returntrue;}GuavaBloomfilter浣跨敤瀵煎叆鍧愭爣COPYcom.google.guavaguava28.0-jre浠ｇ爜瀹炵幇COPYpublicclassGuavaBloomFilter{/***璁剧疆甯冮殕杩囨护鍣ㄥぇ灏?/privatestaticfinalintsize=100000;/***鏋勫缓涓€涓狟loomFilter*绗竴涓弬鏁版槸涓€涓狥unnel绫诲瀷鐨勫弬鏁?绗簩涓弬鏁版槸鏈熸湜澶勭悊鐨勬暟鎹噺*绗笁涓弬鏁版槸鍙€夌殑锛岄粯璁ゆ槸0.03D*/privatestaticfinalBloomFilterbloomFilter=BloomFilter.create(Funnels.stringFunnel(),size);publicstaticvoidmain(String[]args){//鎴愬姛璁℃暟floatsuccess=0;//澶辫触璁℃暟floatfial=0;SetstringSet=newHashSet();for(inti=0;ibloomFilter=BloomFilter.create(Funnels.stringFunnel(),灏哄,0.00001);杈撳嚭COPY鎴愬姛鍒ゆ柇锛?00000.0锛屽垽鏂け璐ヤ釜鏁帮細0.0锛岃鍒ょ巼锛?.0鏈枃鐢变紶鏅烘暀鑲插崥闆胺鐙傞噹寤虹瓚甯堟暀鐮斿洟闃熷彂甯冦€傚鏋滄湰鏂囧鎮ㄦ湁甯姪锛岃鍏虫敞骞剁偣璧烇紱鍧氭寔鍒涢€犵殑鍔ㄥ姏銆傝浆杞借娉ㄦ槑鍑哄锛?/p>