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  • 大小: 3KB
    文件類型: .zip
    金幣: 2
    下載: 0 次
    發(fā)布日期: 2021-06-14
  • 語(yǔ)言: Java
  • 標(biāo)簽: 哈希函數(shù)??Hash??Java??

資源簡(jiǎn)介

System.out.println(" 1. RS-Hash Function Value: " + ghl.RSHash(key)); System.out.println(" 2. JS-Hash Function Value: " + ghl.JSHash(key)); System.out.println(" 3. PJW-Hash Function Value: " + ghl.PJWHash(key)); System.out.println(" 4. ELF-Hash Function Value: " + ghl.ELFHash(key)); System.out.println(" 5. BKDR-Hash Function Value: " + ghl.BKDRHash(key)); System.out.println(" 6. SDBM-Hash Function Value: " + ghl.SDBMHash(key)); System.out.println(" 7. DJB-Hash Function Value: " + ghl.DJBHash(key)); System.out.println(" 8. DEK-Hash Function Value: " + ghl.DEKHash(key)); System.out.println(" 9. BP-Hash Function Value: " + ghl.BPHash(key)); System.out.println(" 9. FNV-Hash Function Value: " + ghl.FNVHash(key)); System.out.println("10. AP-Hash Function Value: " + ghl.APHash(key));

資源截圖

代碼片段和文件信息 

/*
?**************************************************************************
?*????????????????????????????????????????????????????????????????????????*
?*??????????General?Purpose?Hash?Function?Algorithms?Library??????????????*
?*????????????????????????????????????????????????????????????????????????*
?*?Author:?Arash?Partow?-?2002????????????????????????????????????????????*
?*?URL:?http://www.partow.net?????????????????????????????????????????????*
?*?URL:?http://www.partow.net/programming/hashfunctions/index.html????????*
?*????????????????????????????????????????????????????????????????????????*
?*?Copyright?notice:??????????????????????????????????????????????????????*
?*?Free?use?of?the?General?Purpose?Hash?Function?Algorithms?Library?is????*
?*?permitted?under?the?guidelines?and?in?accordance?with?the?most?current?*
?*?version?of?the?Common?Public?License.??????????????????????????????????*
?*?http://www.opensource.org/licenses/cpl.php?????????????????????????????*
?*????????????????????????????????????????????????????????????????????????*
?**************************************************************************
*/


class?GeneralHashFunctionLibrary
{


???public?long?RSHash（String?str）
???{
??????int?b?????=?378551;
??????int?a?????=?63689;
??????long?hash?=?0;

??????for（int?i?=?0;?i???????{
?????????hash?=?hash?*?a?+?str.charAt（i）;
?????????a????=?a?*?b;
??????}

??????return?hash;
???}
???/*?End?Of?RS?Hash?Function?*/


???public?long?JSHash（String?str）
???{
??????long?hash?=?1315423911;

??????for（int?i?=?0;?i???????{
?????????hash?^=?（（hash?<>?2））;
??????}

??????return?hash;
???}
???/*?End?Of?JS?Hash?Function?*/


???public?long?PJWHash（String?str）
???{
??????long?BitsInUnsignedInt?=?（long）（4?*?8）;
??????long?ThreeQuarters?????=?（long）（（BitsInUnsignedInt??*?3）?/?4）;
??????long?OneEighth?????????=?（long）（BitsInUnsignedInt?/?8）;
??????long?HighBits??????????=?（long）（0xFFFFFFFF）?<??????long?hash??????????????=?0;
??????long?test??????????????=?0;

??????for（int?i?=?0;?i???????{
?????????hash?=?（hash?<
?????????if（（test?=?hash?&?HighBits）??!=?0）
?????????{
????????????hash?=?（（?hash?^?（test?>>?ThreeQuarters））?&?（~HighBits））;
?????????}
??????}

??????return?hash;
???}
???/*?End?Of??P.?J.?Weinberger?Hash?Function?*/


???public?long?ELFHash（String?str）
???{
??????long?hash?=?0;
??????long?x????=?0;

??????for（int?i?=?0;?i???????{
?????????hash?=?（hash?<
?????????if（（x?=?hash?&?0xF0000000L）?!=?0）
?????????{
????????????hash?^=?（x?>>?24）;
?????????}
?????????hash?&=?~x;
??????}

??????return?hash;
???}
???/*?End?Of?ELF?Hash?Function?*/


???public?long?BKDRHash（String?str）
???{
??????long?seed?=?131;?//?31?131?1313?13131?131313?etc..
??????long?hash?=?0;

??????for（int?i?=?0;?i???????{
?????????hash?=?（hash?*?seed）?

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2000-01-01?00:00??GeneralHashFunctions_-_Java\
?????文件????????4741??2000-01-01?00:00??GeneralHashFunctions_-_Java\GeneralHashFunctionLibrary.java
?????文件????????2632??2000-01-01?00:00??GeneralHashFunctions_-_Java\GeneralHashTest.java
?????文件?????????695??2000-01-01?00:00??GeneralHashFunctions_-_Java\Makefile

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