analysis-ik分词器

1、安装

离线

使用离线安装下载地址https://release.infinilabs.com/analysis-ik/stable/找到对应es版本的ik分词器、下载zip后放到/elasticsearch/plugins/ik文件夹下。重启es即可生效

在线

bin目录下执行脚本/elasticsearch/bin/elasticsearch-plugin install https://get.infini.cloud/elasticsearch/analysis-ik/es版本号（服务器能连通外网）

2、使用

参考官方地址：https://github.com/infinilabs/analysis-ik/blob/master/README.md

配置

ik_smart：最少切分模式。该模式会尽可能少地切分文本
ik_max_word：最细粒度划分模式。该模式会尽可能多地切分文本，将文本中的每个可能的词语都切分

curl -XPOST "http://localhost:9200/test/_mapping" -H 'Content-Type: application/json' -d
'{        "properties": {            "content": {                "type": "text",                "analyzer": "ik_max_word",                "search_analyzer": "ik_smart"            }        }}'

参数说明将索引 test 的content字段类型为text设置为创建时使用ik_max_word创建相关索引、搜索时用ik_smart

拓展词典

elasticsearch/plugins/ik/config/IKAnalyzer.cfg.xml配置文件进行相关修改

参考链接:
扩展字典
官网

3、测试

注意：已经建好索引

ik_smart

curl -XPOST "http://localhost:9200/_analyze" -H 'Content-Type: application/json' -d'{    "analyzer": "ik_smart",    "text": "中华人民共和国"  }'

分词结果

{"tokens": [{"token": "中华人民共和国","start_offset": 0,"end_offset": 7,"type": "CN_WORD","position": 0}]
}

ik_max_word

curl -XPOST "http://localhost:9200/_analyze" -H 'Content-Type: application/json' -d'{    "analyzer": "ik_max_word",    "text": "中华人民共和国"  }'

分词结果

{"tokens": [{"token": "中华人民共和国","start_offset": 0,"end_offset": 7,"type": "CN_WORD","position": 0},{"token": "中华人民","start_offset": 0,"end_offset": 4,"type": "CN_WORD","position": 1},{"token": "中华","start_offset": 0,"end_offset": 2,"type": "CN_WORD","position": 2},{"token": "华人","start_offset": 1,"end_offset": 3,"type": "CN_WORD","position": 3},{"token": "人民共和国","start_offset": 2,"end_offset": 7,"type": "CN_WORD","position": 4},{"token": "人民","start_offset": 2,"end_offset": 4,"type": "CN_WORD","position": 5},{"token": "共和国","start_offset": 4,"end_offset": 7,"type": "CN_WORD","position": 6},{"token": "共和","start_offset": 4,"end_offset": 6,"type": "CN_WORD","position": 7},{"token": "国","start_offset": 6,"end_offset": 7,"type": "CN_CHAR","position": 8}]
}