ElasticSearch安装中文分词器IK

1、安装IK分词器，下载对应版本的插件，elasticsearch-analysis-ik中文分词器的开发者一直进行维护的，对应着elasticsearch的版本，所以选择好自己的版本即可。IKAnalyzer中文分词器原作者已经不进行维护了，但是Lucece在不断更新，所以使用Lucece和IKAnalyzer中文分词器集成，需要你进行修改IKAnalyzer中文分词器。

下载地址：https://github.com/medcl/elasticsearch-analysis-ik/releases

将下载好的中文分词器上传到你的服务器，或者使用wget命令联网下载，萝卜白菜各有所爱吧。我的IK中文分词器版本对应了ElasticSearch的版本。下载好开始安装，由于我是伪分布集群，就一台集群，就安装一次即可，但是如果是分布式的话，每一台机器都要安装中文分词器的。

2、开始解压缩操作，将elasticsearch-analysis-ik-5.4.3.zip拷贝到一个目录里面进行解压缩操作，安装IK中文分词器。

 1 [root@slaver4 package]# mkdir elasticsearch-analysis-ik
 2 [root@slaver4 package]# cp elasticsearch-analysis-ik-5.4.3.zip elasticsearch-analysis-ik
 3 [root@slaver4 elasticsearch-analysis-ik]# unzip elasticsearch-analysis-ik-5.4.3.zip 
 4 Archive:  elasticsearch-analysis-ik-5.4.3.zip
 5   inflating: elasticsearch-analysis-ik-5.4.3.jar  
 6   inflating: httpclient-4.5.2.jar    
 7   inflating: httpcore-4.4.4.jar      
 8   inflating: commons-logging-1.2.jar  
 9   inflating: commons-codec-1.9.jar   
10    creating: config/
11    creating: config/custom/
12   inflating: config/surname.dic      
13   inflating: config/preposition.dic  
14   inflating: config/custom/mydict.dic  
15   inflating: config/custom/single_word_full.dic  
16   inflating: config/custom/sougou.dic  
17   inflating: config/custom/ext_stopword.dic  
18   inflating: config/custom/single_word.dic  
19   inflating: config/custom/single_word_low_freq.dic  
20   inflating: config/main.dic         
21   inflating: config/IKAnalyzer.cfg.xml  
22   inflating: config/quantifier.dic   
23   inflating: config/stopword.dic     
24   inflating: config/suffix.dic       
25   inflating: plugin-descriptor.properties  
26 [root@slaver4 elasticsearch-analysis-ik]# ls
27 commons-codec-1.9.jar  commons-logging-1.2.jar  config  elasticsearch-analysis-ik-5.4.3.jar  elasticsearch-analysis-ik-5.4.3.zip  httpclient-4.5.2.jar  httpcore-4.4.4.jar  plugin-descriptor.properties
28 [root@slaver4 elasticsearch-analysis-ik]# 

由于unzip的默认解压缩到当前目录，这里可以将elasticsearch-analysis-ik-5.4.3.zip包删除掉。

1 [root@slaver4 elasticsearch-analysis-ik]# ls
2 commons-codec-1.9.jar  commons-logging-1.2.jar  config  elasticsearch-analysis-ik-5.4.3.jar  elasticsearch-analysis-ik-5.4.3.zip  httpclient-4.5.2.jar  httpcore-4.4.4.jar  plugin-descriptor.properties
3 [root@slaver4 elasticsearch-analysis-ik]# rm -rf elasticsearch-analysis-ik-5.4.3.zip 
4 [root@slaver4 elasticsearch-analysis-ik]# ls
5 commons-codec-1.9.jar  commons-logging-1.2.jar  config  elasticsearch-analysis-ik-5.4.3.jar  httpclient-4.5.2.jar  httpcore-4.4.4.jar  plugin-descriptor.properties
6 [root@slaver4 elasticsearch-analysis-ik]#

然后将解压缩好的IK移动到ElasticSearch的plugins目录下面。记得三个节点plugins目录里面都需要放的哦。如下所示：

注意：放到plugins目录里面的IK中文分词器插件，必须放到一个目录里面，再放到plugins目录里面。如我的elasticsearch-analysis-ik里面存的就是IK中文分词器解压缩后的文件。

1 [root@slaver4 package]# mv elasticsearch-analysis-ik/ /home/hadoop/soft/elasticsearch-5.4.3/plugins
2 [root@slaver4 package]# cd /home/hadoop/soft/elasticsearch-5.4.3/plugins
3 [root@slaver4 plugins]# ls
4 elasticsearch-analysis-ik
5 [root@slaver4 plugins]#

由于Elasticsearch没有提供关闭的命令，使用kill -9 进程号，在生产环境也是大忌的，生产环境如果使用kill命令的话，建议使用kill 进程号，让系统把任务处理完，再关闭进程。如果你的es是启动的，使用如下命令进行重启，如果es没有启动，直接启动即可。

1 -- 如果是集群式的，每个节点在每个机器上面，执行如下命令就可以停止es
2 [root@slaver4 elasticsearch-analysis-ik]# kill `ps -ef | grep Elasticsearch | grep -v grep | awk '{print $2}'`

我的es伪集群未启动，这里直接启动即可，伪集群，你启动最好同时启动，不然会出现一些报错，因为他们要感应到集群中的节点，但是没有很大影响的。

在启动head插件的时候，报这种错误，总感觉心里不爽，Local Npm module "grunt-contrib-jasmine" not found. Is it installed?。

 1 [elsearch@slaver4 soft]$ cd elasticsearch-head-master/
 2 [elsearch@slaver4 elasticsearch-head-master]$ ls
 3 crx         Dockerfile-alpine                   Gruntfile.js       index.html  node_modules  package-lock.json             proxy           _site  test
 4 Dockerfile  elasticsearch-head.sublime-project  grunt_fileSets.js  LICENCE     package.json  plugin-descriptor.properties  README.textile  src
 5 [elsearch@slaver4 elasticsearch-head-master]$ cd node_modules/grunt
 6 [elsearch@slaver4 grunt]$ ls
 7 bin  CHANGELOG  lib  LICENSE  node_modules  package.json  README.md
 8 [elsearch@slaver4 grunt]$ cd bin/
 9 [elsearch@slaver4 bin]$ ls
10 grunt
11 [elsearch@slaver4 bin]$ ./grunt -server &
12 [1] 8602
13 [elsearch@slaver4 bin]$ >> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
14 Warning: Task "jasmine" not found. Use --force to continue.
15 
16 Aborted due to warnings.
17 
18 [1]+  Exit 3                  ./grunt -server
19 [elsearch@slaver4 bin]$ jps
20 8388 Elasticsearch
21 8457 Elasticsearch
22 8527 Elasticsearch
23 8623 Jps
24 [elsearch@slaver4 bin]$ ls
25 grunt
26 [elsearch@slaver4 bin]$ ./grunt server &
27 [1] 8633
28 [elsearch@slaver4 bin]$ >> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
29 
30 Running "connect:server" (connect) task
31 Waiting forever...
32 Started connect web server on http://192.168.110.133:9100

如何解决上面的错误呢，如下所示，安装错误的缺失包即可。切记，进入到head的目录，执行命令即可npm install grunt-contrib-jasmine。

如果缺少下面的包，执行如是命令即可。

[elsearch@slaver4 elasticsearch-head-master]$  npm install grunt-contrib-clean grunt-contrib-concat grunt-contrib-watch grunt-contrib-connect grunt-contrib-copy grunt-contrib-jasmine

或者，使用淘宝的源，下载比较快些。

[elsearch@slaver4 elasticsearch-head-master]$  npm install grunt-contrib-clean grunt-contrib-concat grunt-contrib-watch grunt-contrib-connect grunt-contrib-copy grunt-contrib-jasmine --registry=https://registry.npm.taobao.org

 1 [elsearch@slaver4 elasticsearch-head-master]$ ls
 2 crx         Dockerfile-alpine                   Gruntfile.js       index.html  node_modules  package-lock.json             proxy           _site  test
 3 Dockerfile  elasticsearch-head.sublime-project  grunt_fileSets.js  LICENCE     package.json  plugin-descriptor.properties  README.textile  src
 4 [elsearch@slaver4 elasticsearch-head-master]$ npm install grunt-contrib-jasmine
 5 npm WARN elasticsearch-head@0.0.0 license should be a valid SPDX license expression
 6 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules/fsevents):
 7 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
 8 
 9 + grunt-contrib-jasmine@1.0.3
10 added 9 packages from 13 contributors in 30.811s
11 [elsearch@slaver4 elasticsearch-head-master]$

搞了一下，把head插件搞的起不来了，也是郁闷。启动错误如下所示。

1 [elsearch@slaver4 bin]$ >> No "clean" targets found.
2 Warning: Task "clean" failed. Use --force to continue.
3 
4 Aborted due to warnings.
5 
6 [1]+  Exit 3                  ./grunt -server

起不来了，估计是依赖包，出现了问题，我这里直接就将所有的依赖包都更新到最新了。

注意：我使用命令./grunt -server &，这个命令是使用错误了，所以下面更新到最新的依赖包可以不进行操作，浪费时间。

 1 [elsearch@slaver4 bin]$ npm install grunt@latest
 2 stall grunt-contrib-connect@latest
 3 npm ERR! code ENOSELF
 4 npm ERR! Refusing to install package with name "grunt" under a package
 5 npm ERR! also called "grunt". Did you name your project the same
 6 npm ERR! as the dependency you're installing?
 7 npm ERR! 
 8 npm ERR! For more information, see:
 9 npm ERR!     //docs.npmjs.com/cli/install#limitations-of-npms-install-algorithm>
10 
11 npm ERR! A complete log of this run can be found in:
12 npm ERR!     /home/elsearch/.npm/_logs/2019-10-20T09_08_08_039Z-debug.log
13 [elsearch@slaver4 bin]$ npm install grunt-cli@latest
14 npm notice created a lockfile as package-lock.json. You should commit this file.
15 + grunt-cli@1.3.2
16 added 148 packages from 121 contributors, updated 2 packages and audited 984 packages in 180.566s
17 found 0 vulnerabilities
18 
19 [elsearch@slaver4 bin]$ npm install grunt-contrib-copy@latest
20 + grunt-contrib-copy@1.0.0
21 added 9 packages from 3 contributors and audited 994 packages in 36.523s
22 found 0 vulnerabilities
23 
24 [elsearch@slaver4 bin]$ npm install grunt-contrib-concat@latest
25 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
26 
27 + grunt-contrib-concat@1.0.1
28 added 1 package from 1 contributor and audited 1004 packages in 5.282s
29 found 0 vulnerabilities
30 
31 [elsearch@slaver4 bin]$ npm install grunt-contrib-uglify@latest
32 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
33 
34 + grunt-contrib-uglify@4.0.1
35 added 18 packages from 44 contributors and audited 1032 packages in 84.271s
36 found 0 vulnerabilities
37 
38 [elsearch@slaver4 bin]$ npm install grunt-contrib-clean@latest
39 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
40 npm WARN grunt-contrib-clean@2.0.0 requires a peer of grunt@>=0.4.5 but none is installed. You must install peer dependencies yourself.
41 
42 + grunt-contrib-clean@2.0.0
43 added 15 packages from 8 contributors and audited 1050 packages in 16.732s
44 found 0 vulnerabilities
45 
46 [elsearch@slaver4 bin]$ npm install grunt-contrib-watch@latest
47 npm WARN grunt-contrib-clean@2.0.0 requires a peer of grunt@>=0.4.5 but none is installed. You must install peer dependencies yourself.
48 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
49 
50 + grunt-contrib-watch@1.1.0
51 added 24 packages from 28 contributors in 46.459s
52 [elsearch@slaver4 bin]$ npm install grunt-contrib-connect@latest
53 npm WARN grunt-contrib-clean@2.0.0 requires a peer of grunt@>=0.4.5 but none is installed. You must install peer dependencies yourself.
54 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
55 npm WARN grunt-contrib-connect@2.1.0 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
56 
57 + grunt-contrib-connect@2.1.0
58 added 69 packages from 69 contributors and audited 1226 packages in 77.331s
59 found 0 vulnerabilities
60 
61 [elsearch@slaver4 bin]$ npm install grunt-contrib-jasmine@latest
62 
63 > puppeteer@1.20.0 install /home/hadoop/soft/elasticsearch-head-master/node_modules/grunt/node_modules/puppeteer
64 > node install.js
65 
66 Downloading Chromium r686378 - 114 Mb [====================] 100% 0.0s 
67 Chromium downloaded to /home/hadoop/soft/elasticsearch-head-master/node_modules/grunt/node_modules/puppeteer/.local-chromium/linux-686378
68 npm WARN grunt-contrib-clean@2.0.0 requires a peer of grunt@>=0.4.5 but none is installed. You must install peer dependencies yourself.
69 npm WARN grunt-contrib-concat@1.0.1 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
70 npm WARN grunt-contrib-connect@2.1.0 requires a peer of grunt@>=0.4.0 but none is installed. You must install peer dependencies yourself.
71 npm WARN grunt-eslint@22.0.0 requires a peer of grunt@>=1 but none is installed. You must install peer dependencies yourself.
72 
73 + grunt-contrib-jasmine@2.1.0
74 added 244 packages from 120 contributors and audited 2725 packages in 424.187s
75 found 3 high severity vulnerabilities
76   run `npm audit fix` to fix them, or `npm audit` for details
77 [elsearch@slaver4 bin]$ ls
78 grunt
79 [elsearch@slaver4 bin]$ ./grunt server &
80 [1] 8297
81 [elsearch@slaver4 bin]$ Running "connect:server" (connect) task
82 Waiting forever...
83 Started connect web server on http://192.168.110.133:9100
84 
85 [elsearch@slaver4 bin]$

3、回归正题，由于安装好了IK中文分词器，现在需要测试一下，是否安装成功了。

首先创建索引名字叫news，创建完毕以后可以在head插件看到你创建的index索引名称news，如下所示：

1 [elsearch@slaver4 soft]$ ls
2 elasticsearch-5.4.3  elasticsearch-head-master  el_slave  node-v8.16.2-linux-x64  nohup.out
3 [elsearch@slaver4 soft]$ curl -XPUT http://192.168.110.133:9200/news
4 {"acknowledged":true,"shards_acknowledged":true}[elsearch@slaver4 soft]$ 
5 [elsearch@slaver4 soft]$ 

创建好索引以后，创建mapping映射（相当于数据中的schema信息，表名和字段名以及字段的类型），指定那些字段使用什么分词器。切记，三个节点的plugins目录都要放IK中文分词器。

注意：text是分词，存储，建索引。analyzer指定创建索引的时候使用的分词器是IK中文分词器。search_analyzer搜索的时候使用IK中文分词器。

 1 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/_mapping -d'
 2 {
 3         "properties": {
 4             "content": {
 5                 "type": "text",
 6                 "analyzer": "ik_max_word",
 7                 "search_analyzer": "ik_max_word"
 8             }
 9         }
10     
11 }'
12 {"acknowledged":true}[elsearch@slaver4 soft]$

然后开始测试，是否能将中文进行分词。指定中文分词器ik_max_word，-d后面是传参的。

 1 [elsearch@slaver4 soft]$ curl -XGET 'http://192.168.110.133:9200/_analyze?pretty&analyzer=ik_max_word' -d '我要成为java高级工程师'
 2 {
 3   "tokens" : [
 4     {
 5       "token" : "我",
 6       "start_offset" : 0,
 7       "end_offset" : 1,
 8       "type" : "CN_CHAR",
 9       "position" : 0
10     },
11     {
12       "token" : "要",
13       "start_offset" : 1,
14       "end_offset" : 2,
15       "type" : "CN_CHAR",
16       "position" : 1
17     },
18     {
19       "token" : "成为",
20       "start_offset" : 2,
21       "end_offset" : 4,
22       "type" : "CN_WORD",
23       "position" : 2
24     },
25     {
26       "token" : "java",
27       "start_offset" : 4,
28       "end_offset" : 8,
29       "type" : "ENGLISH",
30       "position" : 3
31     },
32     {
33       "token" : "高级工程师",
34       "start_offset" : 8,
35       "end_offset" : 13,
36       "type" : "CN_WORD",
37       "position" : 4
38     },
39     {
40       "token" : "高级工",
41       "start_offset" : 8,
42       "end_offset" : 11,
43       "type" : "CN_WORD",
44       "position" : 5
45     },
46     {
47       "token" : "高级",
48       "start_offset" : 8,
49       "end_offset" : 10,
50       "type" : "CN_WORD",
51       "position" : 6
52     },
53     {
54       "token" : "工程师",
55       "start_offset" : 10,
56       "end_offset" : 13,
57       "type" : "CN_WORD",
58       "position" : 7
59     },
60     {
61       "token" : "工程",
62       "start_offset" : 10,
63       "end_offset" : 12,
64       "type" : "CN_WORD",
65       "position" : 8
66     },
67     {
68       "token" : "师",
69       "start_offset" : 12,
70       "end_offset" : 13,
71       "type" : "CN_CHAR",
72       "position" : 9
73     }
74   ]
75 }
76 [elsearch@slaver4 soft]$ 

ik_smart是更加智能的分词器，推荐使用的，效果如下所示：

 1 [elsearch@slaver4 soft]$ curl -XGET 'http://192.168.110.133:9200/_analyze?pretty&analyzer=ik_smart' -d '我要成为Java高级工程师'
 2 {
 3   "tokens" : [
 4     {
 5       "token" : "我",
 6       "start_offset" : 0,
 7       "end_offset" : 1,
 8       "type" : "CN_CHAR",
 9       "position" : 0
10     },
11     {
12       "token" : "要",
13       "start_offset" : 1,
14       "end_offset" : 2,
15       "type" : "CN_CHAR",
16       "position" : 1
17     },
18     {
19       "token" : "成为",
20       "start_offset" : 2,
21       "end_offset" : 4,
22       "type" : "CN_WORD",
23       "position" : 2
24     },
25     {
26       "token" : "java",
27       "start_offset" : 4,
28       "end_offset" : 8,
29       "type" : "ENGLISH",
30       "position" : 3
31     },
32     {
33       "token" : "高级工程师",
34       "start_offset" : 8,
35       "end_offset" : 13,
36       "type" : "CN_WORD",
37       "position" : 4
38     }
39   ]
40 }
41 [elsearch@slaver4 soft]$

至此，IK中文分词器就创建完毕了。

如何向索引Index中类型Type中添加数据，数据插入成功可以在head插件进行浏览，如下所示。

 1 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/1 -d'
 2 > {"content":"美国留给伊拉克的是个烂摊子吗"}'
 3 {"_index":"news","_type":"fulltext","_id":"1","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"created":true}[elsearch@slaver4 soft]$ 
 4 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/2 -d'
 5 > {"content":"公安部：各地校车将享最高路权"}'
 6 {"_index":"news","_type":"fulltext","_id":"2","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"created":true}[elsearch@slaver4 soft]$ 
 7 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/3 -d'
 8 > {"content":"中韩渔警冲突调查：韩警平均每天扣1艘中国渔船"}'
 9 {"_index":"news","_type":"fulltext","_id":"3","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"created":true}[elsearch@slaver4 soft]$ 
10 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/4 -d'
11 > {"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}'
12 {"_index":"news","_type":"fulltext","_id":"4","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"created":true}[elsearch@slaver4 soft]$ x":"news","_type":"fulltext","_id":"4","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"created":true}[elsearch@slaver4 soft]$ 

数据插入成功以后，可以进行查询高亮显示，如下所示：

 1 [elsearch@slaver4 soft]$ curl -XPOST http://192.168.110.133:9200/news/fulltext/_search  -d'
 2 > {
 3 >     "query" : { "match" : { "content" : "中国" }},
 4 >     "highlight" : {
 5 >         "pre_tags" : ["", ""],
 6 >         "post_tags" : ["", ""],
 7 >         "fields" : {
 8 >             "content" : {}
 9 >         }
10 >     }
11 > }'
12 {"took":194,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":2,"max_score":0.5347766,"hits":[{"_index":"news","_type":"fulltext","_id":"4","_score":0.5347766,"_source":
13 {"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"},"highlight":{"content":["中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"]}},{"_index":"news","_type":"fulltext","_id":"3","_score":0.27638745,"_source":
14 {"content":"中韩渔警冲突调查：韩警平均每天扣1艘中国渔船"},"highlight":{"content":["中韩渔警冲突调查：韩警平均每天扣1艘中国渔船"]}}]}}[elsearch@slaver4 soft]$ 
15 [elsearch@slaver4 soft]$ 

作者：别先生

博客园：https://www.cnblogs.com/biehongli/

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