return (hash & 0x7FFFFFFF);
}
/**//* End Of SDBM Hash Function */
/**//**
* DJB算法
*/
public static int DJBHash(String str)
{
int hash = 5381;
for(int i = 0; i < str.length(); i++)
{
hash = ((hash << 5) + hash) + str.charAt(i);
}
return (hash & 0x7FFFFFFF);
}
/**//* End Of DJB Hash Function */
/**//**
* DEK算法
*/
public static int DEKHash(String str)
{
int hash = str.length();
for(int i = 0; i < str.length(); i++)
{
hash = ((hash << 5) ^ (hash >> 27)) ^ str.charAt(i);
}
return (hash & 0x7FFFFFFF);
}
/**//* End Of DEK Hash Function */
/**//**
* AP算法
*/
public static int APHash(String str)
int hash = 0;
for(int i = 0; i < str.length(); i++)
{
hash ^= ((i & 1) == 0) ( (hash << 7) ^ str.charAt(i) ^ (hash >> 3)) :
(~((hash << 11) ^ str.charAt(i) ^ (hash >> 5)));
}
// return (hash & 0x7FFFFFFF);
return hash;
}
/**//* End Of AP Hash Function */
/**//**
* JAVA自己带的算法
*/
public static int java(String str)
{
int h = 0;
int off = 0;
int len = str.length();
for (int i = 0; i < len; i++)
{
h = 31 * h + str.charAt(off++);
}
return h;
}
/**//**
* 混合hash算法，输出64位的值
*/
public static long mixHash(String str)
{
long hash = str.hashCode();
hash <<= 32;
hash |= FNVHash1(str);
return hash;
}
}
作者“成长的日子”