一、ES简单查询

查询主要有如下几种：

1、query string search
2、query DSL
3、query filter
4、full-text search
5、phrase search
6、highlight search

1.1、query string search

搜索全部商品：GET /ecommerce/product/_search

GET /ecommerce/product/_search

{
  "took": 3,    #耗费了几毫秒
  "timed_out": false,   #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）
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 4,   #查询结果的数量，4个document
    "max_score": 1,   #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": [    #包含了匹配搜索的document的详细数据
      {
        "_index": "ecommerce",
        "_type": "product",
        "_id": "1_update",
        "_score": 1,
        "_source": {
          "doc": {
            "name": "jiaqiangban gaolujie yaogao"
          }
        }
      },
      {
        "_index": "ecommerce",
        "_type": "product",
        "_id": "2",
        "_score": 1,
        "_source": {
          "name": "jiajieshi yagao",
          "desc": "youxiao fangzhu",
          "price": 25,
          "producer": "jiajieshi producer",
          "tags": [
            "fangzhu"
          ]
        }
      },
      {
        "_index": "ecommerce",
        "_type": "product",
        "_id": "1",
        "_score": 1,
        "_source": {
          "name": "gaolujie yagao",
          "desc": "gaoxiao meibai",
          "price": 30,
          "producer": "gaolujie producer",
          "tags": [
            "meibai",
            "fangzhu"
          ]
        }
      },
      {
        "_index": "ecommerce",
        "_type": "product",
        "_id": "3",
        "_score": 1,
        "_source": {
          "name": "zhonghua yagao",
          "desc": "caoben zhiwu",
          "price": 40,
          "producer": "zhonghua producer",
          "tags": [
            "qingxin"
          ]
        }
      }
    ]
  }
}