我使用uax_url_email tokenizer为我们的索引中的电子邮件字段。它工作完美，并生成像johndoe@yahoo.com的普通电子邮件的单一令牌。但是，它生成多个令牌时，电子邮件有外国或特殊字符。有解决这个问题的办法吗？我不希望生成多个令牌

PUT email-test-index
{
  "settings": {
    "index": {
      "analysis": {
        "analyzer": {
          "email_analyzer": {
            "filter": ["lowercase"],
            "tokenizer": "email_tokenizer"
          }
        },
        "tokenizer": {
          "email_tokenizer": {
            "type": "uax_url_email"
          }
        }
      }
    }
  },
  "mappings": {
    "date_detection": false,
    "numeric_detection": false,
    "properties": {
      "EMAIL": {
        "type": "text",
        "store": true,
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        },
        "analyzer": "email_analyzer"
      }
    }
  }
}

当它工作时：

GET email-test-index/_analyze
{
  "field": "EMAIL",
  "text": "johndoe@yahoo.com"
}

{
  "tokens" : [
    {
      "token" : "johndoe@yahoo.com",
      "start_offset" : 0,
      "end_offset" : 17,
      "type" : "<EMAIL>",
      "position" : 0
    }
  ]
}

当它不工作时：

GET email-test-index/_analyze
{
  "field": "EMAIL",
  "text": "johndoeó8@yahoo.com"
}

{
  "tokens" : [
    {
      "token" : "johndoeó8",
      "start_offset" : 0,
      "end_offset" : 9,
      "type" : "<ALPHANUM>",
      "position" : 0
    },
    {
      "token" : "yahoo.com",
      "start_offset" : 10,
      "end_offset" : 19,
      "type" : "<URL>",
      "position" : 1
    }
  ]
}