Elasticsearch
http://www.ruanyifeng.com/blog/2017/08/elasticsearch.html
https://cloud.tencent.com/developer/article/1547867
https://www.cnblogs.com/biehongli/p/11710704.html api操作

Elasticsearch 是基于Lucene开发的一个分布式全文检索框架，向Elasticsearch中存储和从Elasticsearch中查询，格式是json。
向Elasticsearch中存储数据，其实就是向es中的index下面的type中存储json类型的数据。

7.15.1

http://localhost:9200  
Elastic 返回一个 JSON 对象，包含当前节点、集群、版本等信息。
http://localhost:9200/elasticsearch

http://localhost:9200/_cat 
http://localhost:9200/_cat/health?v 查看集群的健康状况
http://localhost:9200/_cat/indices?v 查看所有索引

一，http://localhost:9200/xmhindex  PUT 方式提交，新建索引
返回：
{
    "acknowledged": true,
    "shards_acknowledged": true,
    "index": "xmhindex"
}

二，索引一个文档到 xmhindex 索引中 PUT 方式提交
1) 指定id http://localhost:9200/xmhindex/_doc/1?pretty" -H 'Content-Type: application/json' -d'
{
  "name": "John Doe"
}'
返回：
{
    "_index": "xmhindex",
    "_type": "_doc",
    "_id": "1",
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 0,
    "_primary_term": 1
}
2)不指定id http://localhost:9200/xmhindex/_doc POST 
{
  "name": "xingxmh"
}

三，从 xmhindex 索引中获取指定id的文档
1)http://localhost:9200/xmhindex/_doc/1?pretty
返回：
{
  "_index" : "xmhindex",
  "_type" : "_doc",
  "_id" : "1",
  "_version" : 1,
  "_seq_no" : 0,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "name" : "John Doe"
  }
}

2) 查询所有 http://localhost:9200/xmhindex/_doc/_search GET 方式


四，删除记录
http://localhost:9200/xmhindex/_doc/Q6cjjnwBKUvN8NOwHRUo DELETE 方式


五，全文搜索
http://localhost:9200/xmhindex/_doc/_search
全匹配
{
  "query" : { "match" : { "name" : "xingminghui" }}
}

模糊匹配
{
  "query": {
    "fuzzy": {
      "name" : "xingminghui"
    }
  }
}


https://www.elastic.co/guide/cn/elasticsearch/guide/current/fuzzy-query.html