ES--IK分词器安装

1. github下载相应版本下载(这里提供7.5)

Releases · medcl/elasticsearch-analysis-ik · GitHubThe IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary. - Releases · medcl/elasticsearch-analysis-ikhttps://github.com/medcl/elasticsearch-analysis-ik/releases?after=v7.5.2

2.安装

解压到es的plugin目录下

3. 重启es 

4.使用

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。

# 创建索引ik_max_word
PUT books
{
  "mappings": {
    "properties":{
      "title":{
        "type":"text",
        "analyzer": "ik_max_word"
      },
      "price":{
        "type":"integer"
      },
      "addr":{
        "type":"keyword"
      },
      "company":{
        "properties":{
          "name":{"type":"text"},
          "company_addr":{"type":"text"},
          "employee_count":{"type":"integer"}
        }
      },
      "publish_date":{"type":"date","format":"yyy-MM-dd"}
      
    }
    
  }
}
# 插入数据
PUT books/_doc/1
{
  "title":"大头儿子小偷爸爸",
  "price":100,  
  "addr":"北京天安门",
  "company":{
    "name":"我爱北京天安门",
    "company_addr":"我的家在东北松花江傻姑娘",
    "employee_count":10
  },
  "publish_date":"2019-08-19"
}


PUT books/_doc/2
{
  "title":"白雪公主和十个小矮人",
  "price":"99",
  "addr":"黑暗森里",
  "company":{
    "name":"我的家乡在上海",
    "company_addr":"朋友一生一起走",
    "employee_count":10
  },
  "publish_date":"2018-05-19"
}

GET books/_mapping


# 查看分词
GET _analyze
{
  "analyzer": "ik_max_word",
  "text": "白雪公主和十个小矮人"
}
# 查看文档
GET books/_search
{
  "query": {
    "match": {
      "title": "十"
    }
  }
}

# 创建索引 ik_smart

PUT books2
{
  "mappings": {
    "properties":{
      "title":{
        "type":"text",
        "analyzer": "ik_smart"
      },
      "price":{
        "type":"integer"
      },
      "addr":{
        "type":"keyword"
      },
      "company":{
        "properties":{
          "name":{"type":"text"},
          "company_addr":{"type":"text"},
          "employee_count":{"type":"integer"}
        }
      },
      "publish_date":{"type":"date","format":"yyy-MM-dd"}
      
    }
    
  }
}


PUT books2/_doc/1
{
  "title":"大头儿子小偷爸爸",
  "price":100,  
  "addr":"北京天安门",
  "company":{
    "name":"我爱北京天安门",
    "company_addr":"我的家在东北松花江傻姑娘",
    "employee_count":10
  },
  "publish_date":"2019-08-19"
}


# 
PUT books2/_doc/2
{
  "title":"白雪公主和十个小矮人",
  "price":"99",
  "addr":"黑暗森里",
  "company":{
    "name":"我的家乡在上海",
    "company_addr":"朋友一生一起走",
    "employee_count":10
  },
  "publish_date":"2018-05-19"
}

# 查看分词
GET _analyze
{
  "analyzer": "ik_smart",
  "text": "白雪公主和十个小矮人"
}
# 查看文档
GET books2/_search
{
  "query": {
    "match": {
      "title": "十个"
    }
  }
}