org.nlpcn.commons.lang.finger

Class SimHashService

java.lang.Object

org.nlpcn.commons.lang.finger.SimHashService

public class SimHashService
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SimHashService.Index

Field Summary

Fields

Modifier and Type	Field and Description
protected static Forest	forest 默认停用词词典

Constructor Summary

Constructors

Constructor and Description
SimHashService()

Method Summary

Modifier and Type	Method and Description
List<String>	analysis(String content) 调用分词器，如果你想用自己的分词器。需要覆盖这个方法
SimHashService.Index	createIndex()
long	fingerprint(String content) 获得simhash的指纹
long	hash(String word) hash 方法生成hashcode ， 默认采用murmur64的hash算法，如果需要则覆盖这个方法
int	hmDistance(long a, long b) 比较 ab 的汉明距离
int	hmDistance(String c1, String c2) 传入两个文章进行汉明距离比较

Methods inherited from class java.lang.Object

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

Field Detail

forest

protected static Forest forest

默认停用词词典

Constructor Detail

SimHashService

public SimHashService()

Method Detail

hmDistance

public int hmDistance(long a,
                      long b)

比较 ab 的汉明距离

Parameters:

a -

b -

Returns:

hmDistance

public int hmDistance(String c1,
                      String c2)

传入两个文章进行汉明距离比较

Parameters:

c1 -

c2 -

Returns:

fingerprint

public long fingerprint(String content)

获得simhash的指纹

Parameters:

content -

Returns:

analysis

public List<String> analysis(String content)

调用分词器，如果你想用自己的分词器。需要覆盖这个方法

Returns:

hash

public long hash(String word)

hash 方法生成hashcode ， 默认采用murmur64的hash算法，如果需要则覆盖这个方法

Parameters:

word -

Returns:

createIndex

public SimHashService.Index createIndex()