The IK Analysis plugin integrates Lucene IK analyzer (http://code.google.com/p/ik-analyzer/) into elasticsearch, support customized dictionary.
Analyzer: ik_smart
, ik_max_word
, Tokenizer: ik_smart
, ik_max_word
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
<comment>IK Analyzer 扩展配置</comment>
<!--用户可以在这里配置自己的扩展字典 -->
<entry key="ext_dict"></entry>
<!--用户可以在这里配置自己的扩展停止词字典-->
<entry key="ext_stopwords"></entry>
<!--用户可以在这里配置远程扩展字典 -->
<!-- <entry key="remote_ext_dict">words_location</entry> -->
<entry key="remote_ext_dict"></entry>
<!--用户可以在这里配置远程扩展停止词字典-->
<!-- <entry key="remote_ext_stopwords">words_location</entry> -->
<!-- redis 配置 -->
<entry key="redis.host"></entry>
<entry key="redis.port">6379</entry>
<entry key="redis.username"></entry>
<entry key="redis.password"></entry>
<entry key="redis.database">0</entry>
<!-- mysql 配置 <![CDATA[ 这里写url信息 ]]-->
<entry key="mysql.url"><![CDATA[ ]]></entry>
<entry key="mysql.username">root</entry>
<entry key="mysql.password">dbadmin</entry>
<!-- 刷新配置 -->
<entry key="refresh.delay">10</entry>
<entry key="refresh.period">60</entry>
</properties>
- 改造使用yml配置文件;
dict: # 扩展词库配置
local: # 本地扩展词典配置
main: # 本地主词典扩展词典文件
- extra_main.dic
- extra_single_word.dic
- extra_single_word_full.dic
- extra_single_word_low_freq.dic
stop: # 本地stop词典扩展词典文件
- extra_stopword.dic
remote: # 远程扩展词典配置
http:
# http 服务地址
# main-words path: ${base}/es-dict/main-words/{domain}
# stop-words path: ${base}/es-dict/stop-words/{domain}
base: http://localhost
redis:
# main-words key: es-ik-words:{domain}:main-words
# stop-words key: es-ik-words:{domain}:stop-words
host: localhost
port: 6379
database: 0
username:
password:
mysql:
url: jdbc:mysql://127.0.0.1/ik-db?useSSL=false&serverTimezone=GMT%2B8
username: root
password: dbadmin
refresh: # 刷新配置
delay: 10 # 延迟时间,单位s
period: 60 # 周期时间,单位s
- 调整优化重构Dictionary实现;
- 支持根据不同的业务指定远程动态词源
PUT es-ik-index
{
"settings": {
"analysis.analyzer": {
"ik_smart": {
"type": "ik_smart",
"enable_remote_dict": true,
"domain": "order", # 业务领域
"etymology": "redis" # 词源,可取值:redis,http,mysql,默认为http(xml配置适配)
}
}
},
"mappings": {
"properties": {
"field": {
"type": "text",
"analyzer": "ik_smart"
}
}
}
}
- 修复和重构Http扩展词提供方式的bug;
- 扩展RemoteDictionary,提供可配置的基于MySQL、Redis的扩展词库更新方式;
/*
@author Qicz
Date: 13/07/2021 10:18:19
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for ik_dict_state
-- ----------------------------
DROP TABLE IF EXISTS `ik_dict_state`;
CREATE TABLE `ik_dict_state` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`domain` varchar(100) NOT NULL COMMENT '所属领域',
`state` varchar(10) NOT NULL COMMENT 'newly有更新non-newly无更新',
PRIMARY KEY (`id`) USING BTREE,
UNIQUE KEY `domain` (`domain`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-- ----------------------------
-- Table structure for ik_words
-- ----------------------------
DROP TABLE IF EXISTS `ik_words`;
CREATE TABLE `ik_words` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`word` varchar(200) NOT NULL,
`word_type` tinyint(4) unsigned NOT NULL COMMENT 'word类型,1主词库,2stop词库',
`domain` varchar(100) NOT NULL COMMENT '所属领域',
`create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
PRIMARY KEY (`id`),
KEY `domain` (`domain`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
SET FOREIGN_KEY_CHECKS = 1;
jre/lib/security/java.policy
的grant中加入permission java.security.AllPermission;
- 【TODO】 整理一个完成的使用手册
- 基于SpringBoot的MySQL、Redis扩展词库写入starter
IK version | ES version |
---|---|
master | 7.x -> master |
6.x | 6.x |
5.x | 5.x |
1.10.6 | 2.4.6 |
1.9.5 | 2.3.5 |
1.8.1 | 2.2.1 |
1.7.0 | 2.1.1 |
1.5.0 | 2.0.0 |
1.2.6 | 1.0.0 |
1.2.5 | 0.90.x |
1.1.3 | 0.20.x |
1.0.0 | 0.16.2 -> 0.19.0 |
1.download or compile
-
optional 1 - download pre-build package from here: https://github.com/medcl/elasticsearch-analysis-ik/releases
create plugin folder
cd your-es-root/plugins/ && mkdir ik
unzip plugin to folder
your-es-root/plugins/ik
-
optional 2 - use elasticsearch-plugin to install ( supported from version v5.5.1 ):
./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.3.0/elasticsearch-analysis-ik-6.3.0.zip
NOTE: replace
6.3.0
to your own elasticsearch version
2.restart elasticsearch
1.create a index
curl -XPUT http://localhost:9200/index
2.create a mapping
curl -XPOST http://localhost:9200/index/_mapping -H 'Content-Type:application/json' -d'
{
"properties": {
"content": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
}
}
}'
3.index some docs
curl -XPOST http://localhost:9200/index/_create/1 -H 'Content-Type:application/json' -d'
{"content":"美国留给伊拉克的是个烂摊子吗"}
'
curl -XPOST http://localhost:9200/index/_create/2 -H 'Content-Type:application/json' -d'
{"content":"公安部:各地校车将享最高路权"}
'
curl -XPOST http://localhost:9200/index/_create/3 -H 'Content-Type:application/json' -d'
{"content":"中韩渔警冲突调查:韩警平均每天扣1艘中国渔船"}
'
curl -XPOST http://localhost:9200/index/_create/4 -H 'Content-Type:application/json' -d'
{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}
'
4.query with highlighting
curl -XPOST http://localhost:9200/index/_search -H 'Content-Type:application/json' -d'
{
"query" : { "match" : { "content" : "中国" }},
"highlight" : {
"pre_tags" : ["<tag1>", "<tag2>"],
"post_tags" : ["</tag1>", "</tag2>"],
"fields" : {
"content" : {}
}
}
}
'
Result
{
"took": 14,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2,
"max_score": 2,
"hits": [
{
"_index": "index",
"_type": "fulltext",
"_id": "4",
"_score": 2,
"_source": {
"content": "中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"
},
"highlight": {
"content": [
"<tag1>中国</tag1>驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首 "
]
}
},
{
"_index": "index",
"_type": "fulltext",
"_id": "3",
"_score": 2,
"_source": {
"content": "中韩渔警冲突调查:韩警平均每天扣1艘中国渔船"
},
"highlight": {
"content": [
"均每天扣1艘<tag1>中国</tag1>渔船 "
]
}
}
]
}
}
IKAnalyzer.cfg.xml
can be located at {conf}/analysis-ik/config/IKAnalyzer.cfg.xml
or {plugins}/elasticsearch-analysis-ik-*/config/IKAnalyzer.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
<comment>IK Analyzer 扩展配置</comment>
<!--用户可以在这里配置自己的扩展字典 -->
<entry key="ext_dict">custom/mydict.dic;custom/single_word_low_freq.dic</entry>
<!--用户可以在这里配置自己的扩展停止词字典-->
<entry key="ext_stopwords">custom/ext_stopword.dic</entry>
<!--用户可以在这里配置远程扩展字典 -->
<entry key="remote_ext_dict">location</entry>
<!--用户可以在这里配置远程扩展停止词字典-->
<entry key="remote_ext_stopwords">http://xxx.com/xxx.dic</entry>
</properties>
目前该插件支持热更新 IK 分词,通过上文在 IK 配置文件中提到的如下配置
<!--用户可以在这里配置远程扩展字典 -->
<entry key="remote_ext_dict">location</entry>
<!--用户可以在这里配置远程扩展停止词字典-->
<entry key="remote_ext_stopwords">location</entry>
其中 location
是指一个 url,比如 http://yoursite.com/getCustomDict
,该请求只需满足以下两点即可完成分词热更新。
-
该 http 请求需要返回两个头部(header),一个是
Last-Modified
,一个是ETag
,这两者都是字符串类型,只要有一个发生变化,该插件就会去抓取新的分词进而更新词库。 -
该 http 请求返回的内容格式是一行一个分词,换行符用
\n
即可。
满足上面两点要求就可以实现热更新分词了,不需要重启 ES 实例。
可以将需自动更新的热词放在一个 UTF-8 编码的 .txt 文件里,放在 nginx 或其他简易 http server 下,当 .txt 文件修改时,http server 会在客户端请求该文件时自动返回相应的 Last-Modified 和 ETag。可以另外做一个工具来从业务系统提取相关词汇,并更新这个 .txt 文件。
have fun.
1.自定义词典为什么没有生效?
请确保你的扩展词典的文本格式为 UTF8 编码
2.如何手动安装?
git clone https://github.com/medcl/elasticsearch-analysis-ik
cd elasticsearch-analysis-ik
git checkout tags/{version}
mvn clean
mvn compile
mvn package
拷贝和解压release下的文件: #{project_path}/elasticsearch-analysis-ik/target/releases/elasticsearch-analysis-ik-*.zip 到你的 elasticsearch 插件目录, 如: plugins/analysis-ik 重启elasticsearch
3.分词测试失败 请在某个索引下调用analyze接口测试,而不是直接调用analyze接口 如:
curl -XGET "http://localhost:9200/your_index/_analyze" -H 'Content-Type: application/json' -d'
{
"text":"中华人民共和国MN","tokenizer": "my_ik"
}'
- ik_max_word 和 ik_smart 什么区别?
ik_max_word: 会将文本做最细粒度的拆分,比如会将“中华人民共和国国歌”拆分为“中华人民共和国,中华人民,中华,华人,人民共和国,人民,人,民,共和国,共和,和,国国,国歌”,会穷尽各种可能的组合,适合 Term Query;
ik_smart: 会做最粗粒度的拆分,比如会将“中华人民共和国国歌”拆分为“中华人民共和国,国歌”,适合 Phrase 查询。
自 v5.0.0 起
- 移除名为
ik
的analyzer和tokenizer,请分别使用ik_smart
和ik_max_word
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