ES基础(二十二) 多语言及中文分词与检索

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

课程demo

  • 来到杨过曾经生活过的地方,小龙女动情地说:“我也想过过过儿过过的生活。”

  • 你也想犯范范玮琪犯过的错吗

  • 校长说衣服上除了校徽别别别的

  • 这几天天天天气不好

  • 我背有点驼,麻麻说“你的背得背背背背佳

#stop word

DELETE my_index
PUT /my_index/_doc/1
{ "title": "I'm happy for this fox" }

PUT /my_index/_doc/2
{ "title": "I'm not happy about my fox problem" }


POST my_index/_search
{
  "query": {
    "match": {
      "title": "not happy fox"
    }
  }
}


#虽然通过使用 english (英语)分析器,使得匹配规则更加宽松,我们也因此提高了召回率,但却降低了精准匹配文档的能力。为了获得两方面的优势,我们可以使用multifields(多字段)对 title 字段建立两次索引: 一次使用 `english`(英语)分析器,另一次使用 `standard`(标准)分析器:

DELETE my_index

PUT /my_index
{
  "mappings": {
    "blog": {
      "properties": {
        "title": {
          "type": "string",
          "analyzer": "english"
        }
      }
    }
  }
}

PUT /my_index
{
  "mappings": {
    "blog": {
      "properties": {
        "title": {
          "type": "string",
          "fields": {
            "english": {
              "type":     "string",
              "analyzer": "english"
            }
          }
        }
      }
    }
  }
}


PUT /my_index/blog/1
{ "title": "I'm happy for this fox" }

PUT /my_index/blog/2
{ "title": "I'm not happy about my fox problem" }

GET /_search
{
  "query": {
    "multi_match": {
      "type":     "most_fields",
      "query":    "not happy foxes",
      "fields": [ "title", "title.english" ]
    }
  }
}


#安装插件
./elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.1.0/elasticsearch-analysis-ik-7.1.0.zip
#安装插件
bin/elasticsearch install https://github.com/KennFalcon/elasticsearch-analysis-hanlp/releases/download/v7.1.0/elasticsearch-analysis-hanlp-7.1.0.zip




#ik_max_word
#ik_smart
#hanlp: hanlp默认分词
#hanlp_standard: 标准分词
#hanlp_index: 索引分词
#hanlp_nlp: NLP分词
#hanlp_n_short: N-最短路分词
#hanlp_dijkstra: 最短路分词
#hanlp_crf: CRF分词(在hanlp 1.6.6已开始废弃)
#hanlp_speed: 极速词典分词

POST _analyze
{
  "analyzer": "hanlp_standard",
  "text": ["剑桥分析公司多位高管对卧底记者说,他们确保了唐纳德·特朗普在总统大选中获胜"]

}     

#Pinyin
PUT /artists/
{
    "settings" : {
        "analysis" : {
            "analyzer" : {
                "user_name_analyzer" : {
                    "tokenizer" : "whitespace",
                    "filter" : "pinyin_first_letter_and_full_pinyin_filter"
                }
            },
            "filter" : {
                "pinyin_first_letter_and_full_pinyin_filter" : {
                    "type" : "pinyin",
                    "keep_first_letter" : true,
                    "keep_full_pinyin" : false,
                    "keep_none_chinese" : true,
                    "keep_original" : false,
                    "limit_first_letter_length" : 16,
                    "lowercase" : true,
                    "trim_whitespace" : true,
                    "keep_none_chinese_in_first_letter" : true
                }
            }
        }
    }
}


GET /artists/_analyze
{
  "text": ["刘德华 张学友 郭富城 黎明 四大天王"],
  "analyzer": "user_name_analyzer"
}

相关资源

一些分词工具,供参考:

 

posted @ 2020-12-27 12:39  秋华  阅读(900)  评论(0编辑  收藏  举报