ES query returns the value Detailed

curl -XGET
‘localhost:9200/books/_search?pretty&q=title:elasticsearch’

Responses returned below Elasticsearch

{
    "took":4,                            请求花了多少时间
    "time_out":false,				  	 有没有超时
    "_shards":{    						 执行请求时查询的分片信息
        "total":5,     					 查询的分片数量
        "successful":5,  				 成功返回结果的分片数量
        "failed":0   					 失败的分片数量
    },
    "hits":{
        "total":2,       				 查询返回的文档总数
        "max_score":0.625,  			 计算所得的最高分
        "hits":[						 返回文档的hits数组
            {
                "_index":"books",		 索引
                "_type":"es",     		 属性
                "_id":"1",      		 标志符
                "_score":0.625,      	 得分
                "_source":{			  	 发送到索引的JSON对象
                    "title":"Elasticsearch Server",
                    "publish":2013
                }
            },
            {
                "_index":"books",
                "_type":"es",
                "_id":"2",
                "_score":0.19178301,
                "_source":{
                    "title":"Mastering Elasticsearch",
                    "published":2013
                }
            }
        ]
    }
}```