添加数据

PUT /ecommerce/_doc/1
{
  "name": "jiajieshi yagao",
  "desc": "youxiao fangzhu",
  "price": 25,
  "producer": "jiajieshi producer",
  "tags": [
    "fangzhu"
  ]
}

PUT /ecommerce/_doc/2
{
  "name": "jiajieshi yagao",
  "desc": "youxiao fangzhu",
  "price": 25,
  "producer": "jiajieshi producer",
  "tags": [
    "fangzhu"
  ]
}

PUT /ecommerce/_doc/3
{
  "name": "zhonghua yagao",
  "desc": "caoben zhiwu",
  "price": 40,
  "producer": "zhonghua producer",
  "tags": [
    "qingxin"
  ]
}

query string search

搜索全部:GET /ecommerce/_search/

1	GET /ecommerce/_search/

结果：

{
  "took" : 48,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "ecommerce",
        "_type" : "1",
        "_id" : "PBRZU2oB2AOCCrYzyACo",
        "_score" : 1.0,
        "_source" : {
          "name" : "gaolujie yagao",
          "desc" : "gaoxiao meibai",
          "price" : 30,
          "producer" : "gaolujie producer",
          "tags" : [
            "meibai",
            "fangzhu"
          ]
        }
      },
      {
        "_index" : "ecommerce",
        "_type" : "1",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "jiaqiangban gaolujie yagao",
          "desc" : "gaoxiao meibai",
          "price" : 30,
          "producer" : "gaolujie producer",
          "tags" : [
            "meibai",
            "fangzhu"
          ]
        }
      }
    ]
  }
}

took：耗费了几毫秒。
timed_out：是否超时，这里是没有。
_shards：数据拆成了5个分片，所以对于搜索请求，会打到所有的primary shard（或者是它的某个replica shard也可以）。
hits.total：查询结果的数量，3个document。
hits.max_score：score的含义，就是document对于一个search的相关度的匹配分数，越相关，就越匹配，分数也高。
hits.hits：包含了匹配搜索的document的详细数据。

query DSL

DSL：Domain Specified Language，特定领域的语言
http request body：请求体，可以用json的格式来构建查询语法，比较方便，可以构建各种复杂的语法，比query string search肯定强大多了。

查询所有的商品

GET /ecommerce/_search
{
  "query": { "match_all": {} }
}

查询名称包含yagao的商品，同时按照价格降序排序

GET /ecommerce/_search
{
  "query": {
   "match": {
     "name": "yagao"
   }
  },
  "sort": [
    {
      "price": {
        "order": "desc"
      }
    }
  ]
}

分页查询商品，总共2条商品，假设每页就显示1条商品，现在显示第2页，所以就查出来第2个商品.

指定要查询出来商品的名称和价格就可以

GET /ecommerce/_search
{
  "query": {
    "match_all": {}
  },
  "_source":["name","price"]
}

query filter

搜索商品名称包含yagao，而且售价大于25元的商品

GET /ecommerce/_search
{
    "query" : {
        "bool" : {
            "must" : {
                "match" : {
                    "name" : "yagao" 
                }
            },
            "filter" : {
                "range" : {
                    "price" : { "gt" : 30 } 
                }
            }
        }
    }
}

full-text search（全文检索）

GET /ecommerce/_search
{
    "query" : {
        "match" : {
            "producer" : "yagao producer"
        }
    }
}

phrase search（短语搜索）

跟全文检索相对应，相反，全文检索会将输入的搜索串拆解开来，去倒排索引里面去一一匹配，只要能匹配上任意一个拆解后的单词，就可以作为结果返回
phrase search，要求输入的搜索串，必须在指定的字段文本中，完全包含一模一样的，才可以算匹配，才能作为结果返回

GET /ecommerce/_search
{
    "query" : {
        "match_phrase" : {
            "producer" : "yagao producer"
        }
    }
}

highlight search（高亮搜索结果）

GET /ecommerce/_search
{
    "query" : {
        "match" : {
            "producer" : "producer"
        }
    },
    "highlight": {
        "fields" : {
            "producer" : {}
        }
    }
}