添加一条索引
PUT /索引名/_doc/文档ID
=
PUT /库名/_doc/表名
例如：
PUT /chenchenchen/_doc/1
{
"name": "shihao",
"age": 3
}
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查找一条索引
GET /索引名/_doc/文档ID
GET _cat/health ——可以查看集群的健康状态（head界面那个）
GET _cat/indices?v ——每个索引的版本信息
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更新一条索引记录
ES7以前：POST /索引名/_doc/文档ID/_update
ES8以上：POST /索引名/_update/文档ID
POST /chenchenchen/_update/1
{
"doc": {
"name": "法外狂徒shihao"
}
}