我使用了一些参数type_table。

(Optional, array of strings) Array of custom type mappings for characters. This allows you to map non-alphanumeric characters as numeric or alphanumeric to avoid splitting on those characters.

For example, the following array maps the plus (+) and hyphen (-) characters as alphanumeric, which means they won’t be treated as delimiters.

试验：
输入键盘

GET /_analyze
{
  "tokenizer": "keyword",
  "filter": {
    "type": "word_delimiter_graph",
    "preserve_original": true,
    "type_table": [ "_ => ALPHA" ]
  },
  "text": "i-pad"
}

令牌：

{
  "tokens": [
    {
      "token": "i-pad",
      "start_offset": 0,
      "end_offset": 5,
      "type": "word",
      "position": 0,
      "positionLength": 2
    },
    {
      "token": "i",
      "start_offset": 0,
      "end_offset": 1,
      "type": "word",
      "position": 0
    },
    {
      "token": "pad",
      "start_offset": 2,
      "end_offset": 5,
      "type": "word",
      "position": 1
    }
  ]
}

i_焊盘

GET /_analyze
{
  "tokenizer": "keyword",
  "filter": {
    "type": "word_delimiter_graph",
    "preserve_original": true,
    "type_table": [ "_ => ALPHA" ]
  },
  "text": "i_pad"
}

令牌：

{
  "tokens": [
    {
      "token": "i_pad",
      "start_offset": 0,
      "end_offset": 5,
      "type": "word",
      "position": 0
    }
  ]
}