elasticSearch 接口实现查询热词统计

前面讲过使用elasticsearch可视化工具可以直接写语法查询如下：

GET robot-demand/_search
{
  "size":10, //查询多少条数据
  "aggs":{
    "hot_words":{
      "terms":{
        "field": "title"
      }
    }
  }
}

结果如下：

#! Elasticsearch built-in security features are not enabled. Without authentication, your cluster could be accessible to anyone. See https://www.elastic.co/guide/en/elasticsearch/reference/7.14/security-minimal-setup.html to enable security.
{"took" : 1,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 8,"relation" : "eq"},"max_scor