elastic search自定义分析器

这里我们定义两个字段分别用n-gram与ik两种分词器。n-gram可以分成最小最大的用法，也可指定分词器，我们这里指定使用snowball。

准备索引，删除以前的

DELETE /book2

1.定义索引

PUT book2
{
  "settings": {
    "analysis": {
      "filter": {
        "autocomplete_filter": {
          "type": "edge_ngram",
          "min_gram": 1,
          "max_gram": 20
        }
      },
      "analyzer": {
        "autocomplete": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "snowball"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "name": {
        "type": "text",
        "analyzer": "autocomplete"
      },
      "title": {
        "type": "text",
        "analyzer": "ik_max_word"
      }
    
    }
  }
}

这里定义了索引book2,两个字段name与title,分别用snowball的n-gram分词器与ik分词器。

2.再放置三条记录(document)

PUT /book2/_doc/1
{
  "age":   1,  
  "email":  "1@com", 
  "name":   "administrators",
  "title": "中华人民共和国"
}

PUT /book2/_doc/2
{
  "age":   2,  
  "email":  "2@com", 
  "name":   "admin",
  "title": "中华人民"
}

PUT /book2/_doc/3
{
  "age":   3,  
  "email":  "3@com", 
  "name":   "administr",
  "title": "中华"
}

然后我们分别用term与match来进行查询：

GET /book2/_search
{
  "explain": true,
  "query": {
    "bool":{
      "must": { "match_all": {} },
      
      "filter": {
        "term":{
          "name":"administrators"
        }
      }
    }
  }
}

GET /book2/_search
{
  "explain": true,
  "query": {
    "bool":{
      "must": { "match_all": {} },
      
      "filter": {
        "match":{
          "name":"administrators"
        }
      }
    }
  }
}

3.最后，用一个bool查询两个字段都需满足条件的。

用match,没有问题。

换成term,相当于like '%xx%'

GET /book2/_search
{
  "explain": true,
  "query": {
    "bool":{
      "must": { "match_all": {} },
      
      "filter": {
        "bool":{
          "must":[
          {
            "match":{
              "title":"人民"
            }
          },
          {
            "match":{
              "name":"administrators"
            }
          }
          ]
        }
      }
    }
  }
}

试验结果: