这些API负责管理索引的所有方面，如设置，别名，映射，索引模板。

创建索引

此API可用于创建索引。 当用户将JSON对象传递到任何索引时，可以自动创建索引，也可以在此之前创建索引。 要创建索引，只需要发送包含设置，映射和别名的发布请求，或者只发送一个没有正文的简单请求。 例如

POST http://localhost:9200/colleges

{"acknowledged":true}

POST http://localhost:9200/colleges

{
   "settings" : {
      "index" : {
         "number_of_shards" : 5, "number_of_replicas" : 3
      }
   }
}

{"acknowledged":true}

POST http://localhost:9200/colleges

{
   "settings" : {
      "number_of_shards" : 3
   },

   "mappings" : {
      "type1" : {
         "_source" : { "enabled" : false }, "properties" : {
            "college_name" : { "type" : "string" }, "college type" : {"type":"string"}
         }
      }
   }
}

{"acknowledged":true}

POST http://localhost:9200/colleges

{
   "aliases" : {
      "alias_1" : {}, "alias_2" : {
         "filter" : {
            "term" : {"user" : "manu" }
         },
         "routing" : "manu"
      }
   }
}

{"acknowledged":true}

此API可用来删除任何索引。只需要传递一个删除请求以及指定索引的URL。 例如

DELETE http://localhost:9200/colleges

可以通过使用_all，*删除所有索引。

获取索引

这个API可以通过发送get请求到一个或多个索引来调用。这将返回有关索引的信息。

GET http://localhost:9200/schools

{
   "schools":{
      "aliases":{}, "mappings":{
         "school":{
            "properties":{
               "city":{"type":"string"}, "description":{"type":"string"},
               "fees":{"type":"long"}, "location":{"type":"double"},
               "name":{"type":"string"}, "rating":{"type":"string"},
               "state":{"type":"string"}, "street":{"type":"string"},
               "tags":{"type":"string"}, "zip":{"type":"string"}
            }
         }
      },

      "settings":{
         "index":{
            "creation_date":"1454409831535", "number_of_shards":"5",
            "number_of_replicas":"1", "uuid":"iKdjTtXQSMCW4xZMhpsOVA",
            "version":{"created":"2010199"}
         }
      },
      "warmers":{}
   }
}

测试索引存在

可以通过向该索引发送获取请求来确定索引的存在。如果HTTP响应为200，则存在; 如果是404，它不存在。

打开/关闭索引API

通过在post中添加_close或_open来请求索引，可以很容易地关闭或打开一个或多个索引。 例如，
关闭索引

POST http://localhost:9200/schools/_close

POST http://localhost:9200/schools/_open

此API有助于使用_aliases关键字向任何索引提供别名。 单个别名可以映射到多个别名，且别名不能与索引具有相同的名称。 例如

POST http://localhost:9200/_aliases

{
   "actions" : [
      { "add" : { "index" : "schools", "alias" : "schools_pri" } }
   ]
}

{"acknowledged":true}

GET http://localhost:9200/schools_pri

{"schools":{"aliases":{"schools_pri":{}},"}}

可以通过在URL结尾处附加_settings关键字来获取索引设置。 例如

GET http://localhost:9200/schools/_settings

{
   "schools":{
      "settings":{
         "index":{
            "creation_date":"1454409831535", "number_of_shards":"5", 
            "number_of_replicas":"1", "uuid":"iKdjTtXQSMCW4xZMhpsOVA", 
            "version":{"created":"2010199"}
        }
      }
   }
}

此API有助于分析文本并使用偏移值和数据类型发送令牌。 例如

POST http://localhost:9200/_analyze

{
   "analyzer" : "standard",
   "text" : "you are reading this at YIIBAI point"
}

{
   "tokens":[
      {"token":"you", "start_offset":0, "end_offset":3, "type":"<ALPHANUM>", "position":0},
      {"token":"are", "start_offset":4, "end_offset":7, "type":"<ALPHANUM>", "position":1},
      {"token":"reading", "start_offset":8, "end_offset":15, "type":"<ALPHANUM>", "position":2},
      {"token":"this", "start_offset":16, "end_offset":20, "type":"<ALPHANUM>", "position":3},
      {"token":"at", "start_offset":21, "end_offset":23, "type":"<ALPHANUM>", "position":4},
      {"token":"tutorials", "start_offset":24, "end_offset":33, "type":"<ALPHANUM>", "position":5},
      {"token":"point", "start_offset":34, "end_offset":39, "type":"<ALPHANUM>", "position":6}
   ]
}