elasticsearch 中文分词（elasticsearch-analysis-ik）安装

elasticsearch 中文分词（elasticsearch-analysis-ik）安装

下载最新的发布版本
https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.3.0/elasticsearch-analysis-ik-6.3.0.zip

在elasticsearch的plugins目录下，创建ik目录

cd /usr/local/elasticsearch-6.3.0/plugins
mkdir ik

将解压的内容，放入其中

重新启动elasticsearch服务

elasticsearch restart

这个时候中文分词就生效了，数据重新插入即可

GET /megacorp/employee/_search
{
    "query" : {
        "match" : {
            "about" : "程序员 编程"
        }
    }
}

搜索结果

{
  "took": 8,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 1.654172,
    "hits": [
      {
        "_index": "megacorp",
        "_type": "employee",
        "_id": "2",
        "_score": 1.654172,
        "_source": {
          "first_name": "张",
          "last_name": "三",
          "age": 24,
          "about": "一个PHP程序员，热爱编程，热爱生活，充满激情。",
          "interests": [
            "英雄联盟"
          ]
        }
      }
    ]
  }
}

或者通过（elasticsearch-plugin）在线安装，速度有点慢。

./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.3.0/elasticsearch-analysis-ik-6.3.0.zip

-> Downloading https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.3.0/elasticsearch-analysis-ik-6.3.0.zip
[=================================================] 100%   
-> Installed analysis-ik

发现多了一个文件夹

使用

GET _analyze?pretty
{
  "analyzer": "ik_smart",
  "text": "中华人民共和国国歌"
}

{
  "tokens": [
    {
      "token": "中华人民共和国",
      "start_offset": 0,
      "end_offset": 7,
      "type": "CN_WORD",
      "position": 0
    },
    {
      "token": "国歌",
      "start_offset": 7,
      "end_offset": 9,
      "type": "CN_WORD",
      "position": 1
    }
  ]
}

再一个例子

GET _analyze?pretty
{
  "analyzer": "ik_smart",
  "text": "王者荣耀是最好玩的游戏"
}

{
  "tokens": [
    {
      "token": "王者",
      "start_offset": 0,
      "end_offset": 2,
      "type": "CN_WORD",
      "position": 0
    },
    {
      "token": "荣耀",
      "start_offset": 2,
      "end_offset": 4,
      "type": "CN_WORD",
      "position": 1
    },
    {
      "token": "是",
      "start_offset": 4,
      "end_offset": 5,
      "type": "CN_CHAR",
      "position": 2
    },
    {
      "token": "最",
      "start_offset": 5,
      "end_offset": 6,
      "type": "CN_CHAR",
      "position": 3
    },
    {
      "token": "好玩",
      "start_offset": 6,
      "end_offset": 8,
      "type": "CN_WORD",
      "position": 4
    },
    {
      "token": "的",
      "start_offset": 8,
      "end_offset": 9,
      "type": "CN_CHAR",
      "position": 5
    },
    {
      "token": "游戏",
      "start_offset": 9,
      "end_offset": 11,
      "type": "CN_WORD",
      "position": 6
    }
  ]
}