org.dromara.hutool.core.codec.hash

Class MurmurHash

java.lang.Object

org.dromara.hutool.core.codec.hash.MurmurHash

All Implemented Interfaces:

Encoder<byte[],Number>, Hash128<byte[]>, Hash32<byte[]>, Hash64<byte[]>

public class MurmurHash
extends Object
implements Hash32<byte[]>, Hash64<byte[]>, Hash128<byte[]>

Murmur3 32bit、64bit、128bit 哈希算法实现
此算法来自于：...

32-bit Java port of https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp#94
128-bit Java port of https://code.google.com/p/smhasher/source/browse/trunk/MurmurHash3.cpp#255

Since:

4.3.3

Author:

looly, Simhash4J

Field Summary

Fields

Modifier and Type	Field and Description
static MurmurHash	INSTANCE 单例

Constructor Summary

Constructors

Constructor and Description
MurmurHash()

Method Summary

Modifier and Type	Method and Description
Number	encode(byte[] bytes) 执行编码
Number128	hash128(byte[] data) Murmur3 128-bit 算法.
Number128	hash128(byte[] data, int length, int seed) Murmur3 128-bit variant.
Number128	hash128(byte[] data, int offset, int length, int seed) Murmur3 128-bit variant.
Number128	hash128(CharSequence data) Murmur3 128-bit Hash值计算
int	hash32(byte[] data) Murmur3 32-bit Hash值计算
int	hash32(byte[] data, int length, int seed) Murmur3 32-bit Hash值计算
int	hash32(byte[] data, int offset, int length, int seed) Murmur3 32-bit Hash值计算
int	hash32(CharSequence data) Murmur3 32-bit Hash值计算
long	hash64(byte[] data) Murmur3 64-bit 算法 This is essentially MSB 8 bytes of Murmur3 128-bit variant.
long	hash64(byte[] data, int length, int seed) 类Murmur3 64-bit 算法 This is essentially MSB 8 bytes of Murmur3 128-bit variant.
long	hash64(CharSequence data) Murmur3 64-bit Hash值计算

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final MurmurHash INSTANCE

单例

Constructor Detail

MurmurHash

public MurmurHash()

Method Detail

encode

public Number encode(byte[] bytes)

Description copied from interface: Encoder

执行编码

Specified by:

encode in interface Encoder<byte[],Number>

Specified by:

encode in interface Hash128<byte[]>

Specified by:

encode in interface Hash32<byte[]>

Specified by:

encode in interface Hash64<byte[]>

Parameters:

bytes - 被编码的数据

Returns:

编码后的数据

hash32

public int hash32(CharSequence data)

Murmur3 32-bit Hash值计算

Parameters:

data - 数据

Returns:

Hash值

hash32

public int hash32(byte[] data)

Murmur3 32-bit Hash值计算

Specified by:

hash32 in interface Hash32<byte[]>

Parameters:

data - 数据

Returns:

Hash值

hash32

public int hash32(byte[] data,
                  int length,
                  int seed)

Murmur3 32-bit Hash值计算

Parameters:

data - 数据

length - 长度

seed - 种子，默认0

Returns:

Hash值

hash32

public int hash32(byte[] data,
                  int offset,
                  int length,
                  int seed)

Murmur3 32-bit Hash值计算

Parameters:

data - 数据

offset - 数据开始位置

length - 长度

seed - 种子，默认0

Returns:

Hash值

hash64

public long hash64(CharSequence data)

Murmur3 64-bit Hash值计算

Parameters:

data - 数据

Returns:

Hash值

hash64

public long hash64(byte[] data)

Murmur3 64-bit 算法
This is essentially MSB 8 bytes of Murmur3 128-bit variant.

Specified by:

hash64 in interface Hash64<byte[]>

Parameters:

data - 数据

Returns:

Hash值

hash64

public long hash64(byte[] data,
                   int length,
                   int seed)

类Murmur3 64-bit 算法
This is essentially MSB 8 bytes of Murmur3 128-bit variant.

Parameters:

data - 数据

length - 长度

seed - 种子，默认0

Returns:

Hash值

hash128

public Number128 hash128(CharSequence data)

Murmur3 128-bit Hash值计算

Parameters:

data - 数据

Returns:

Hash值 (2 longs)

hash128

public Number128 hash128(byte[] data)

Murmur3 128-bit 算法.

Specified by:

hash128 in interface Hash128<byte[]>

Parameters:

data - -数据

Returns:

Hash值 (2 longs)

hash128

public Number128 hash128(byte[] data,
                         int length,
                         int seed)

Murmur3 128-bit variant.

Parameters:

data - 数据

length - 长度

seed - 种子，默认0

Returns:

Hash值(2 longs)

hash128

public Number128 hash128(byte[] data,
                         int offset,
                         int length,
                         int seed)

Murmur3 128-bit variant.

Parameters:

data - 数据

offset - 数据开始位置

length - 长度

seed - 种子，默认0

Returns:

Hash值(2 longs)