【ES】给索引指定Mapping并创建内容并查询

【Mapping的用处】

mapping会把JSON文档文档映射成Lucene所需要的扁平格式
一个mapping属于一个索引的type
每个文档都属于一个Type
一个type又一个mapping定义
7.0开始，不需要在mapping定义中指定type信息，因为默认每个索引只有一个type叫"_doc"

【创建索引member并定义两个字段的mapping】

命令：

curl -H "Content-Type: application/json" -XPUT 'localhost:9200/member' -d' {
   "mappings" : {
      "properties" : {
        "name" : {
          "type" : "text",//text类型全文搜索
          "fields" : {
            "keyword" : {
              "type" : "keyword",//keyword支持聚合查询
              "ignore_above" : 256
            }
          }
        },
        "age":{
            "type":"text",
            "index_options":"offsets"//控制倒排索引记录的内容。offsets最多，记录四个
        }
      }
    }
}'

反馈：

{"acknowledged":true,"shards_acknowledged":true,"index":"member"}

【以Post方式创建一个成员andy】

命令：

curl -H "Content-Type: application/json" -XPOST 'localhost:9200/member/_doc' -d' {
   "name":"andy",
   "age":"11"
}'

反馈：

{"_index":"member","_type":"_doc","_id":"GPYzH4EB81RixwMxUXbz","_version":1,"result":"created","_shards":{"total":2,"successful":1,"failed":0},"_seq_no":0,"_primary_term":1}

【以PUT方式创建一个成员bill】

命令：

curl -H "Content-Type: application/json" -XPUT 'localhost:9200/member/_doc/2' -d' {
   "name":"bill",
   "age":"21"
}'

反馈：

{"_index":"member","_type":"_doc","_id":"2","_version":1,"result":"created","_shards":{"total":2,"successful":1,"failed":0},"_seq_no":1,"_primary_term":1}

【查询名称为andy的memebr】

命令：

curl -H "Content-Type: application/json" -XGET 'localhost:9200/member/_search' -d' {
   "query":{
      "match":{
         "name":{
         "query":"andy"
     }
      }
   }
}'

反馈：

{"took":1272,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":1,"relation":"eq"},"max_score":0.6931471,"hits":[{"_index":"member","_type":"_doc","_id":"GPYzH4EB81RixwMxUXbz","_score":0.6931471,"_source": {
   "name":"andy",
   "age":"11"
}}]}}

【查询名称为andy的memebr（漂亮模式）】

命令：

curl -H "Content-Type: application/json" -XGET 'localhost:9200/member/_search?pretty' -d' {
   "query":{
      "match":{
         "name":{
         "query":"andy"
     }
      }
   }
}'

反馈：

{
  "took" : 28,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 0.6931471,
    "hits" : [
      {
        "_index" : "member",
        "_type" : "_doc",
        "_id" : "GPYzH4EB81RixwMxUXbz",
        "_score" : 0.6931471,
        "_source" : {
          "name" : "andy",
          "age" : "11"
        }
      }
    ]
  }
}

【参考网页】

1. https://www.jianshu.com/p/7950d6cd78e5

2. https://blog.csdn.net/fanrenxiang/article/details/85317344

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