听课笔记（61讲—62讲）定制分词器

最新推荐文章于 2025-02-27 11:46:07 发布

原创最新推荐文章于 2025-02-27 11:46:07 发布 · 171 阅读

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本文详细介绍了在Elasticsearch中如何手动创建索引，并深入探讨了自定义分词器的方法，包括设置标准分词器和创建复合自定义分词器，通过实例展示了如何分析和优化文本搜索效率。

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手动如何创建索引，如何修改索引

第62讲

自定义分词器：

PUT /my_index
{
  "settings": {
    "analysis": {
      "analyzer": {
        "es_std":{
          "type":"standard",
          "stopwoords":"_english"
        }
      }
    }
  }
}

GET /my_index/_analyze
{
  "analyzer": "es_std",
  "text": "a dog is in the house"
}

PUT /my_index
{
  "settings": {
    "analysis": {
      "char_filter": {
        "&_to_and":{
          "type":"mapping",
          "mapping":["&=>and"]
        }
      },
      "filter": {
        "my_stopwords":{
          "type":"stop",
          "stopwords":["the","a"]
        }
      },
      "analyzer": {
        "my_analyzer":{
          "type":"custom",
          "char_filter":["html_strip","&_to_and"],
          "tokenizer":"standard",
          "filter":["lowercase","my_stopwords"]
        }
      }
    }
  }
}

GET /my_index/_analyze
{
  "text": "the quick & brown fox",
  "analyzer": "my_analyzer"
}
GET /my_index/_analyze
{
  "text": "tom&jerry are a friend in the house,<a>,haha!!",
  "analyzer": "my_analyzer"
}
PUT /my_index/_analyze
{
  "properties":{
    "title":{
      "type":"string",
      "analyzer":"my_analyzer"
    }
  }
}