使用ES客户端工具RestHighLevelClient，如何对下面的数据按照affections进行分组，使用Java代码

Question

```{
"_index": "search20190812",
"_type": "_doc",
"_id": "7f409ae73291a8f9a423ac85217bd615",
"_version": 1,
"_score": 1,
"_source": {
"userInfo": [{
"isPush": 0,
"affections": 3
}],
"infoId": "f032169bf587e4e74198ad48b9780e2d",
"mediaurl": "",
"weiboattention": 0
}
}

Answer 1

https://blog.csdn.net/ZF98095/article/details/98622551