Elasticsearch-HttpAPI

1.添加索引

添加索引person，类型为student，主键为1

curl -X PUT -H "Content-Type: application/json" -d 
'{"id":1,"name":"yyc1","age":27,"interets":["game","basketball"]}' 
'http://localhost:9200/person/student/1' -i

当主键ID已存在时Elasticsearch执行的操作是将原来的文档置为失效，新增一个文档，文档版本号+1，如果要实现ID存在不新增的逻辑，url如下：

http://localhost:9200/person/student/1?op_type=create
or
http://localhost:9200/person/student/1/_create

2.获取索引数据

获取索引person，类型student，主键为1的文档数据

curl "http://localhost:9200/person/student/1"

{
    "_index":"person",
    "_type":"student",
    "_id":"1",
    "_version":1,
    "found":true,
    "_source":{
        "id":1,
        "name":"yyc1",
        "age":27,
        "interests":[
            "game",
            "basketball"
        ]
    }
}

3.修改索引

修改ID=1的文档数据，再次使用PUT命令即可，字段存在更新字段，否则新增字段。Elasticsearch内部实际上是将原来的文档置为失效，合并原有文档和传入的文本，新增一个全新的文档，版本号+1

curl -X PUT -H "Content-Type: application/json" -d '{"id":1,"name":"yyc1","age":27,"interets":["game","basketball","movies"],"desc":"modify index"}' 'http://localhost:9200/person/student/1' -i

修改后结果

    "_index":"person",
    "_type":"student",
    "_id":"1",
    "_version":2,
    "found":true,
    "_source":{
        "id":1,
        "name":"yyc1",
        "age":27,
        "intreets":[
            "game",
            "basketball",
            "movies"
        ],
        "desc":"modify index"
    }
}

4.删除索引

删除ID=1的文档数据，Elasticsearch不会立即删除这些文档，先置为失效状态，后台慢慢处理要删除的文档。

curl -X DELETE "http://localhost:9200/person/student/1" -i

5.Lucene语法索引数据

索引name=yyc3并且age=18的数据

curl -X GET 'http://localhost:9200/person/student/_search?q=name:"yyc3" AND age:18'

hits数组是查询结果，total是匹配的总数，默认返回10条数据

{
    "took":3,
    "timed_out":false,
    "_shards":{
        "total":5,
        "successful":5,
        "skipped":0,
        "failed":0
    },
    "hits":{
        "total":1,
        "max_score":1.287682,
        "hits":[
            {
                "_index":"person",
                "_type":"student",
                "_id":"3",
                "_score":1.287682,
                "_source":{
                    "id":3,
                    "name":"yyc3",
                    "age":18,
                    "intreests":[
                        "game",
                        "basketball",
                        "java"
                    ],
                    "desc":"java developer"
                }
            }
        ]
    }
}

6.判断文档是否存在

HTTP状态码200-存在，404-不存在

curl -XHEAD "http://localhost:9200/person/student/1"

7.批量获取文档数据

必选：索引_index，类型_type，主键_id
可选：_source指定返回字段，默认所有
未被索引到的found=fasle

curl "http://localhost:9200/_mget"
{
   "docs" : [
      {
         "_index":"xxx",
         "_type":"xxx",
         "_id":xxx,
         "_source":["xxx","xxx",...]
      },
      {
         "_index" : "xxx",
         "_type" :  "xxx",
         "_id" :    xxx,
         "_source":["xxx","xxx",...]
      },
     ...
   ]
}

相同索引/类型

curl "http://localhost:9200/profilecenter/profile/_mget"
{
  "ids":[1,2,3...]
}

返回结构

{
    "docs":[
        {
            "_index":"xxx",
            "_type":"xxx",
            "_id":xxx,
            "_version":xxx,
            "found":true/false,
            "_source":{xxx}
        },
        {
            "_index":"xxx",
            "_type":"xxx",
            "_id":xxx,
            "_version":xxx,
            "found":true/false,
            "_source":{xxx}
        }
    ]
}