ElasticSearch 同义词

参考：

• https://www.cnblogs.com/spectrelb/p/8038980.html
• https://www.jianshu.com/p/3e63f6739631
• 官方：https://www.elastic.co/guide/en/elasticsearch/reference/6.2/analysis-synonym-tokenfilter.html

1. 自定义同义词 token filter

PUT /myindex
{
  "settings": {
    "analysis": {
      // 自定义同义词token filter
      "filter": {
        "chinese_synonym_filter": {
          // type设置为"synonym"
          "type": "synonym",
          // 指定同义词文件
          "synonyms_path": "analysis/chinese_synonym.txt"
        }
      },
      // 自定义analyzer，在ik_max_word的基础上使用同义词filter
      "analyzer": {
        "ik_max_word_synonym": {
          "type": "custom",
          "tokenizer": "ik_max_word",
          "filter": ["chinese_synonym_filter"]
        }
      }
    }
  },
  
  "mappings": {
    "mytype": {
      "properties": {
         // 测试字段
        "title": {
          "type": "text",
          "analyzer": "ik_max_word_synonym"
        }
      }
    }
  }
}

测试

GET myindex/_analyze
{
  "text": ["一个人无论怎么努力"],
  "analyzer": "ik_max_word_synonym"
}