鐢?a target="_self">Java鏉ュ鐞嗛珮綺懼害闂錛岀浉淇″寰堝ACMer鏉ヨ閮芥槸涓浠跺緢happy鐨勪簨錛岀畝鍗曟槗鎳傘傜敤Java鍒蜂簡涓浜涢錛屾劅瑙塉ava榪樹笉閿欙紝鍦ㄥ鐞嗛珮綺懼害鍜岃繘鍒惰漿鎹腑錛岃皟鐢ㄥ簱鍑芥暟鐨勬潵澶勭悊銆備笅闈㈡槸鍐欑殑涓浜汮ava涓竴浜涘熀鏈殑鍑芥暟鐨勫強鍏?#8230;…
澶存枃浠訛細import java.io.*;
璇誨叆錛?
杈撳嚭錛? 瀹氫箟錛? 鏁版嵁綾誨瀷錛?/p> 鏁版嵁綾誨瀷 甯冨皵鍨? 瀛楄妭鍨? 瀛楃鍨? 鐭暣鍨? 鏁村瀷 闀挎暣鍨? 嫻偣鍨? 鍙岀簿搴﹀瀷 榪欓噷鐗瑰埆瑕佹彁鍑哄嚭鐨勪袱縐嶇被鍨嬶細 BigInteger 浠繪剰澶х殑鏁存暟錛屽師鍒欎笂鏄紝鍙浣犵殑璁$畻鏈虹殑鍐呭瓨瓚沖澶э紝鍙互鏈夋棤闄愪綅鐨?/p> BigInteger 浠繪剰澶х殑瀹炴暟錛屽彲浠ュ鐞嗗皬鏁扮簿搴﹂棶棰樸?/p> BigInteger涓竴浜涘父瑙佺殑鍑芥暟錛?/p> A=BigInteger.ONE B=BigInteger.TEN C=BigInteger.ZERO 涓浜涘父瑙佺殑鏁扮殑璧嬪垵鍊箋傚皢int鍨嬬殑鏁拌祴鍊肩粰BigInteger錛孊igInteger.valueOf(k); 鍩烘湰鐨勫嚱鏁幫細 valueOf:璧嬪垵鍊?/p> add:+ subtract:- multiply:* divide:/ remainder錛歵his % val divideAndRemainder錛歛[0]=this / val; a[1]=this % val pow錛歛.pow(b)=a^b gcd,abs:鍏害鏁幫紝緇濆鍊?/p> negate錛氬彇璐熸暟 signum錛氱鍙峰嚱鏁?/p> mod錛歛.mod(b)=a%b; shiftLeft:宸︾Щ錛宼his << n 錛宼his*2^n; shiftRight:鍙崇Щ錛宼his >> n錛宼his/2^n; and:絳夊悓浜巆++鐨?amp;&,涓旓紱 or錛殀|錛屾垨; xor:寮傛垨錛孊igInteger xor(BigInteger val),this^val not:!,闈烇紱 bitLength錛氳繑鍥炶鏁扮殑鏈灝忎簩榪涘埗琛ョ爜琛ㄧず鐨勪綅鐨勪釜鏁幫紝鍗?*涓嶅寘鎷? 絎﹀彿浣?(ceil(log2(this <0 ? -this : this + 1)))銆傚姝f暟鏉ヨ錛岃繖絳変環浜庢櫘閫氫簩榪涘埗琛ㄧず鐨勪綅鐨勪釜鏁般?/p> bitCount錛氳繑鍥炶鏁扮殑浜岃繘鍒惰ˉ鐮佽〃紺轟腑涓嶅寘鎵╃鍙蜂綅鍦ㄥ唴鐨勪綅鐨勪釜鏁般傝鏂規硶鍦?BigIntegers 涔嬩笂瀹炵幇浣嶅悜閲忛鏍肩殑闆嗗悎鏃跺緢鏈夌敤銆?/p> isProbablePrime錛氬鏋滆 BigInteger 鍙兘鏄礌鏁幫紝鍒欒繑鍥? true 錛涘鏋滃畠寰堟槑紜槸涓涓悎鏁幫紝鍒欒繑鍥?false 銆?鍙傛暟 certainty 鏄璋冪敤鑰呮効鎰忓繊鍙楃殑涓嶇‘瀹氭х殑搴﹂噺錛氬鏋滆鏁版槸绱犳暟鐨勬鐜囪秴榪囦簡 1 - 1/2**certainty鏂規硶錛屽垯璇ユ柟娉曡繑鍥?true 銆傛墽琛屾椂闂存姣斾簬鍙傛暟紜畾鎬х殑鍊箋?/p> compareTo錛氭牴鎹鏁板兼槸灝忎簬銆佺瓑浜庛佹垨澶т簬 val 榪斿洖 -1銆? 鎴?1錛?/p> equals錛氬垽鏂袱鏁版槸鍚︾浉絳夛紝涔熷彲浠ョ敤compareTo鏉ヤ唬鏇匡紱 min錛宮ax錛氬彇涓や釜鏁扮殑杈冨皬銆佸ぇ鑰咃紱 intValue錛宭ongValue錛宖loatValue錛宒oublue錛氭妸璇ユ暟杞崲涓鴻綾誨瀷鐨勬暟鐨勫箋?/p> 浠婂ぉ鍙傝冭鏈啓浜嗕竴涓叧浜庝簩榪涘埗涓庡崄榪涘埗杞崲鐨勭▼搴忥紝紼嬪簭綆楁硶涓嶉毦錛屼絾鍐欏畬鍚庢祴璇曞彂鐜頒笉璁烘槸浜岃漿鍗佽繕鏄崄杞簩錛屽浜庡ぇ浜?1浜垮嵆瓚呰繃鏁存暟鑼冨洿鐨勬暟涓嶈兘寰堝ソ鐨勮漿鎹€傞兘浼氬彉鎴?. 1錛孊igInteger灞炰簬java.math.BigInteger,鍥犳鍦ㄦ瘡嬈′嬌鐢ㄥ墠閮借import 榪欎釜綾匯傚伓寮濮嬪氨蹇樿import浜嗭紝浜庢槸鎬繪彁紺烘壘涓嶅埌鎻愮ず絎︺?/p> 2錛屽叾鏋勯犳柟娉曟湁寰堝錛屼絾鐜板湪鍋剁敤鍒扮殑鏈夛細 BigInteger(String val) 3錛孊igInteger綾繪ā鎷熶簡鎵鏈夌殑int鍨嬫暟瀛︽搷浣滐紝濡俛dd()==“+”,divide()==“-”絳夛紝浣嗘敞鎰忓叾鍐呭榪涜鏁板榪愮畻鏃朵笉鑳界洿鎺ヤ嬌鐢ㄦ暟瀛﹁繍綆楃榪涜榪愮畻錛屽繀欏諱嬌鐢ㄥ叾鍐呴儴鏂規硶銆傝屼笖鍏舵搷浣滄暟涔熷繀欏諱負BigInteger鍨嬨?br /> 濡傦細two.add(2)灝辨槸涓縐嶉敊璇殑鎿嶄綔錛屽洜涓?娌℃湁鍙樹負BigInteger鍨嬨?/p> 4錛屽綋瑕佹妸璁$畻緇撴灉杈撳嚭鏃跺簲璇ヤ嬌鐢?toString鏂規硶灝嗗叾杞崲涓?0榪涘埗鐨勫瓧絎︿覆錛岃緇嗚鏄庡涓嬶細 5,鍙﹀璇存槑涓変釜涓敤鍒扮殑鍑芥暟銆? compareTo 灝咮igInteger鐨勬暟杞負2榪涘埗錛?/p> public class TestChange {
鍙傝冧功綾嶅彂鐜頒嬌鐢ㄤ嬌鐢˙igInteger鍙互瑙e喅榪欎釜闂銆?br /> 浜庢槸鏌ユ壘浜嗕笅JDK,鐒跺悗嫻嬭瘯鍑犳緇堜簬鍐欐垚鍔熶簡錛?br /> 浣跨敤蹇冨緱濡備笅錛?/p>
public int compareTo(BigInteger val)灝嗘 BigInteger 涓庢寚瀹氱殑 BigInteger 榪涜姣旇緝銆傚浜庨拡瀵瑰叚涓竷灝旀瘮杈冭繍綆楃 (<, ==, >, >=, !=, <=) 涓殑姣忎竴涓繍綆楃鐨勫悇涓柟娉曪紝浼樺厛鎻愪緵姝ゆ柟娉曘傛墽琛岃繖浜涙瘮杈冪殑寤鴻璇彞鏄細(x.compareTo(y) <op> 0)錛屽叾涓? <op> 鏄叚涓瘮杈冭繍綆楃涔嬩竴銆?br /> 鎸囧畾鑰咃細
鎺ュ彛 Comparable<BigInteger> 涓殑 compareTo
鍙傛暟錛?br /> val - 灝嗘 BigInteger 涓庝箣姣旇緝鐨?BigInteger銆?br /> 榪斿洖錛?/p>
public static void main(String[] args) {
System.out.println(change("3",10,2));
}
//num 瑕佽漿鎹㈢殑鏁?from婧愭暟鐨勮繘鍒?to瑕佽漿鎹㈡垚鐨勮繘鍒?br /> private static String change(String num,int from, int to){
return new java.math.BigInteger(num, from).toString(to);
}
}
寤虹珛瀹屾垚鍚庯紝鍙互鍙戠幇錛氥?strong>WebContent銆?銆?strong>WEB-INF銆?銆?strong>web.xml銆戯紝宸茬粡娣誨姞浜嗗垰鎵嶇殑閭d釜servlet鐨勪俊鎭?/p>
---------
闇瑕佹敞鎰忥細闇瑕佹妸tomcat涓殑servlet-api.jar import 鍒幫細銆?strong>WebContent銆?銆?strong>WEB-INF銆?銆恖ib銆戜腑1.嫻忚鍣ㄧ殑鍒鋒柊涓庤漿鍒扮殑鍖哄埆
2.Web鐜涓媟equest銆乫orward銆乺edirect銆乪rror涔嬮棿鐨勫叧鑱斾笌鍖哄埆
3.Web鐜涓嬭姹傛柟寮廏ET涓嶱OST鐨勫尯鍒?/p>
4.URL涓嶶RI鐨勫尯鍒?/p>
鍏充簬HTTP璇鋒眰嫻佺▼鍙傝涓嬮潰鐨刄RL鍦板潃錛?/p>
http://www.cnblogs.com/stg609/archive/2008/07/06/1236966.html
涓.嫻忚鍣ㄧ殑鍒鋒柊涓庤漿鍒扮殑鍖哄埆
鍒鋒柊錛氬湪鐜版湁緗戦〉鐨勫熀紜涓婃鏌ョ綉欏電殑鏄惁鏈夋洿鏂扮殑鍐呭銆傚湪媯鏌ユ椂浼氫繚鐣欎箣鍓嶇殑涓浜涘彉閲忕殑鍊鹼紝鍥犳鏈夋椂鍙兘浼氶犳垚鍒鋒柊鍚庣綉欏靛嚭鐜伴敊璇紝鎴栬呮棤娉曟墦寮鐨勬儏鍐點備笌杞埌鐨勫尯鍒槸嫻忚鍣ㄥ彇緗戦〉鐨勬柊鍐呭鏉ユ洿鏂版湰鏈虹紦瀛橈紝鍦ㄦ洿鏂扮殑鍚屾椂淇濈暀涔嬪墠鐨勪竴浜涘彉閲忋?/p>
杞埌錛氱浉褰撲簬鍦ㄥ湴鍧鏍忎腑閲嶆柊杈撳叆緗戦〉鐨刄RL璁塊棶錛屾祻瑙堝櫒浼氬敖閲忎嬌鐢ㄥ凡緇忓瓨浜庢湰鏈轟腑鐨勭紦瀛樸傜浉瀵逛簬鍒鋒柊錛岃漿鍒版槸涓縐嶅叏鏂扮殑璁塊棶錛屽畠浼氬敖閲忎嬌鐢ㄦ湰鏈轟腑鐨勭紦瀛樻枃浠訛紝浣嗕笉淇濈暀涔嬪墠鐨勫彉閲忋?/p>
浜?web鐜涓媟equest銆乫orward銆乺edirect銆乪rror涔嬮棿鐨勫叧鑱斾笌鍖哄埆
request錛氬悜鏈嶅姟鍣ㄥ彂閫佷竴涓姹傦紝鐒跺悗鏈嶅姟鍣ㄤ細榪斿洖涓涓粨鏋滅粰璇鋒眰瀹㈡埛绔紝騫墮檮甯︿竴涓猺esponse code銆?/p>
forward錛氭槸鏈嶅姟鍣ㄥ唴閮ㄩ噸瀹氬悜錛岀▼搴忔敹鍒拌姹傚悗閲嶆柊瀹氬悜鍒板彟涓涓▼搴忥紝鑰屽鎴鋒満騫朵笉鐭ユ檽銆傚鎴風欏甸潰鐨剈rl鍦板潃涓嶄細鍙戠敓鏀瑰彉銆?/p>
redirect錛氭槸鏈嶅姟鍣ㄦ敹鍒拌姹傚悗鍙戦佷竴涓姸鎬佸ご緇欏鎴鳳紝瀹㈡埛灝嗗啀嬈¤姹傦紝灝辨湁涓ゆ緗戠粶閫氳鐨勬潵寰銆傚茍涓斿浜庡鎴鋒潵璇磚rl鍦板潃宸茬粡鍙戠敓浜嗗彉鍖栥?/p>
鍖哄埆:
綾誨埆 | 姒傚康 | 鍏變韓鏁版嵁 | 搴旂敤 |
Redirect | URL閲嶆柊瀹氬悜錛氬彲浠ユ槸浠繪剰鐨刄RL | 涓嶈兘鍏變韓request閲岄潰鐨勬暟鎹?/div> | 涓鑸敤浜庣敤鎴鋒敞閿鐧誨綍鏃惰繑鍥炰富欏甸潰鍜岃煩杞埌鍏跺畠鐨勭綉绔欑瓑絳?/div> |
Forward | 欏甸潰鐨勮漿鍙戯細鍙兘鏄悓涓涓猈eb搴旂敤紼嬪簭鐨勫叾浠朩eb緇勪歡 | 杞彂欏甸潰鍜岃漿鍙戝埌鐨勯〉闈㈠彲浠ュ叡鎬equest閲岄潰鐨勬暟鎹?/div> | 涓鑸敤浜庣敤鎴風櫥褰曠殑鏃跺欐牴鎹鑹茶漿鍙戝埌鐩稿簲鐨勬ā鍧楃瓑絳?/div> |
涓?GET涓嶱OST鏂規硶鐨勫尯鍒?/p>
HTTP 瀹氫箟浜嗕笌鏈嶅姟鍣ㄤ氦浜掔殑涓嶅悓鏂規硶錛屾渶鍩烘湰鐨勬柟娉曟槸 GET 鍜?POST銆備簨瀹炰笂 GET 閫傜敤浜庡鏁拌姹傦紝鑰屼繚鐣?POST 浠呯敤浜庢洿鏂扮珯鐐廣傛牴鎹? HTTP 瑙勮寖錛孏ET 鐢ㄤ簬淇℃伅鑾峰彇錛岃屼笖搴旇鏄?瀹夊叏鐨勫拰 騫傜瓑鐨勩傛墍璋撳畨鍏ㄧ殑鎰忓懗鐫璇ユ搷浣滅敤浜庤幏鍙栦俊鎭岄潪淇敼淇℃伅銆傛崲鍙ヨ瘽璇達紝GET 璇鋒眰涓鑸笉搴斾駭鐢熷壇浣滅敤銆傚箓絳夌殑鎰忓懗鐫瀵瑰悓涓 URL 鐨勫涓姹傚簲璇ヨ繑鍥炲悓鏍風殑緇撴灉銆傚畬鏁寸殑瀹氫箟騫朵笉鍍忕湅璧鋒潵閭f牱涓ユ牸銆備粠鏍規湰涓婅錛屽叾鐩爣鏄綋鐢ㄦ埛鎵撳紑涓涓摼鎺ユ椂錛屽ス鍙互紜俊浠庤嚜韜殑瑙掑害鏉ョ湅娌℃湁鏀瑰彉璧勬簮銆?姣斿錛屾柊闂葷珯鐐圭殑澶寸増涓嶆柇鏇存柊銆傝櫧鐒剁浜屾璇鋒眰浼氳繑鍥炰笉鍚岀殑涓鎵規柊闂伙紝璇ユ搷浣滀粛鐒惰璁や負鏄畨鍏ㄧ殑鍜屽箓絳夌殑錛屽洜涓哄畠鎬繪槸榪斿洖褰撳墠鐨勬柊闂匯傚弽涔嬩害鐒躲侾OST 璇鋒眰灝變笉閭d箞杞繪澗浜嗐侾OST 琛ㄧず鍙兘鏀瑰彉鏈嶅姟鍣ㄤ笂鐨勮祫婧愮殑璇鋒眰銆備粛鐒朵互鏂伴椈绔欑偣涓轟緥錛岃鑰呭鏂囩珷鐨勬敞瑙e簲璇ラ氳繃 POST 璇鋒眰瀹炵幇錛屽洜涓哄湪娉ㄨВ鎻愪氦涔嬪悗绔欑偣宸茬粡涓嶅悓浜嗭紙姣旀柟璇存枃绔犱笅闈㈠嚭鐜頒竴鏉℃敞瑙o級錛?br />
鍦‵ORM鎻愪氦鐨勬椂鍊欙紝濡傛灉涓嶆寚瀹歁ethod錛屽垯榛樿涓?GET璇鋒眰錛孎orm涓彁浜ょ殑鏁版嵁灝嗕細闄勫姞鍦╱rl涔嬪悗錛屼互?鍒嗗紑涓巙rl鍒嗗紑銆傚瓧姣嶆暟瀛楀瓧絎﹀師鏍峰彂閫侊紝浣嗙┖鏍艱漿鎹負“+“鍙鳳紝鍏跺畠絎﹀彿杞崲涓?XX,鍏?涓璛X涓鴻絎﹀彿浠?6榪涘埗琛ㄧず鐨凙SCII錛堟垨ISO Latin-1錛夊箋侴ET璇鋒眰璇鋒彁浜ょ殑鏁版嵁鏀劇疆鍦℉TTP璇鋒眰鍗忚澶翠腑錛岃孭OST鎻愪氦鐨勬暟鎹垯鏀懼湪瀹炰綋鏁版嵁涓紱
GET鏂瑰紡鎻愪氦鐨勬暟鎹渶澶氬彧鑳芥湁1024瀛楄妭錛岃孭OST鍒欐病鏈夋闄愬埗銆?/p>
鍥?URL涓嶶RI鐨勫尯鍒?/p>
url:鍚屼竴璧勬簮瀹氫綅絎?
uri:鍚屼竴璧勬簮鏍囧織絎?/p>
url瀹氫綅瀹㈡埛绔繛鎺ュ埌鏈嶅姟鍣ㄦ墍闇瑕佺殑淇℃伅錛屽
http://www.csdn.net
http://tcc.com:8080/servlet/logon?name=zhangsan&addr=tttt
瀹屾暣鏋勬垚
<protocol>://<servername>[:port]/<url-path>[?query-string]
uri鏄痷rl緇勬垚鐨勪竴閮ㄥ垎錛屾病鏈夊煙鍚嶅拰鏌ヨ瀛楃涓詫紝
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http://java.sun.com/products/servlet/index.html?id=09
url--->http://java.sun.com/products/servlet/index.html?id=09
uri--->/products/servlet/index.html