这不是你想要的，但可以帮助你找到解决方案。
Elasticsearch Highlight
下面是一个例子：

PUT test_highligh/_doc/1
{
  "description": "It is a very beautiful day to go for a walk"
}

GET /test_highligh/_search
{
  "query": {
    "match": {
      "description": "day"
    }
  },
  "highlight": {
    "fields": {
      "description": {
        "pre_tags": ["..."],
        "post_tags": ["..."],
         "fragment_size" : 3
      }
    }
  }
}

fragment_size突出显示的片段的大小，以字符为单位。默认值为100。
输出：

"hits": [
  {
    "_index": "test_highligh",
    "_id": "1",
    "_score": 0.2876821,
    "_source": {
      "description": "It is a very beautiful day to go for a walk"
    },
    "highlight": {
      "description": [
        "beautiful ...day..."
      ]
    }
  }
]