_search 命令是查询
9200/index/type/_search
_delete_by_query 命令是删除
9200/index/type/_delete_by_query
注：
删除也是先走和查询一样的语法，只是最后的命令是 删除的命令
删除后语法
{
“took”: 18,
“timed_out”: false,
“total”: 1,
“deleted”: 1,
“batches”: 1,
“version_conflicts”: 0,
“noops”: 0,
“retries”: {
“bulk”: 0,
“search”: 0
},
“throttled_millis”: 0,
“requests_per_second”: -1.0,
“throttled_until_millis”: 0,
“failures”: []
}
deleted：1 删除成功
java 通过esId（es生产的唯一性id）