ElasticSearch fuzzy模糊查询（英文检索）

亦凉 2023-07-16 03:49 22阅读 0赞

###  fuzzy实现模糊查询 ###

value:查询的关键字  
boost:查询的权值，默认值是1.0  
min\_similarity:设置匹配的最小相似度，默认值为0.5, 对于字符串,取值为0-1(包括0和1);对于数值，取值可能大于1;对于日期型取值为1d,1m等，1d就代表1天  
prefix\_length:指明区分词项的共同前缀长度，默认是0  
max\_expansions:查询中的词项可以扩展的数目，默认可以无限大  
GET /ib3/user/ search \{ "queny":\{ "fuzy\*:\{ \*interests": "chagge\* \}\}\}  
GET /ib3/user/\_ search \{ "query":\{ "fuzzy\*: \{ "interests":\{ "value\*: "chagge" \}\}\}

\#下面可以明显查询条件写错了，但是我们使用模糊查询就可以查询出来，模糊查询很简单

#fuzzy模糊查询
    GET /lib3/user/_search
    {
      "query": {
        "fuzzy": {"name": "zholiu"}
      }
    }

{
      "took" : 587,
      "timed_out" : false,
      "_shards" : {
        "total" : 5,
        "successful" : 5,
        "skipped" : 0,
        "failed" : 0
      },
      "hits" : {
        "total" : 1,
        "max_score" : 0.23973508,
        "hits" : [
          {
            "_index" : "lib3",
            "_type" : "user",
            "_id" : "1",
            "_score" : 0.23973508,
            "_source" : {
              "name" : "zhaoliu",
              "address" : "hei long jiang sheng tie ling shi",
              "age" : 50,
              "birthday" : "1970-12-12",
              "interests" : "xi buan hejiu, duanlian, lvyou"
            }
          }
        ]
      }
    }

GET /lib3/user/_search
    {
      "query": {
        "fuzzy": {
          "interests": {"value": "chagge"}
        }
      }
    }

{
      "took" : 35,
      "timed_out" : false,
      "_shards" : {
        "total" : 5,
        "successful" : 5,
        "skipped" : 0,
        "failed" : 0
      },
      "hits" : {
        "total" : 3,
        "max_score" : 0.57762265,
        "hits" : [
          {
            "_index" : "lib3",
            "_type" : "user",
            "_id" : "2",
            "_score" : 0.57762265,
            "_source" : {
              "name" : "zhaoming",
              "address" : "bei jing hai dian qu qing he zhen",
              "age" : 20,
              "birthday" : "1998-10-12",
              "interests" : "xi huan hejiu, duanlian, changge"
            }
          },
          {
            "_index" : "lib3",
            "_type" : "user",
            "_id" : "5",
            "_score" : 0.23973508,
            "_source" : {
              "name" : "zhangsan",
              "address" : "bei jing chao yang qu",
              "age" : 29,
              "birthday" : "1988-10-12",
              "interests" : "xi huan tingyinyue , changge , tiaowu"
            }
          },
          {
            "_index" : "lib3",
            "_type" : "user",
            "_id" : "3",
            "_score" : 0.23973508,
            "_source" : {
              "name" : "lisi",
              "address" : "bei jing hai dian qu qing he zhen",
              "age" : 23,
              "birthday" : "1998-10-12",
              "interests" : "xi huan hejiu,duanlian, changge"
            }
          }
        ]
      }
    }