给Elasticsearch-ik分词器添加额外的分词字典

默认分词

可以看到 马拉巴尔 被拆分了

GET /news/_analyze
{
  "text":"四国联盟将在澳大利亚举行“马拉巴尔2023”演习",
  "analyzer": "ik_max_word"
}

...
{
      "token" : "马拉",
      "start_offset" : 13,
      "end_offset" : 15,
      "type" : "CN_WORD",
      "position" : 9
    },
    {
      "token" : "拉巴",
      "start_offset" : 14,
      "end_offset" : 16,
      "type" : "CN_WORD",
      "position" : 10
    },
    {
      "token" : "尔",
      "start_offset" : 16,
      "end_offset" : 17,
      "type" : "CN_CHAR",
      "position" : 11
    },
...

添加自定义字典

vim ./plugins/ik/config/custom/location.dic
在 location.dic 中添加马拉巴尔以及其它自定义分词

vim ./plugins/ik/config/IKAnalyzer.cfg.xml
在IKAnalyzer.cfg.xml中引用自定义字典

DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
        <comment>IK Analyzer 扩展配置comment>
        
        <entry key="ext_dict">custom/location.dicentry>
         
        <entry key="ext_stopwords">entry>
        
        
        
        
properties>

最终结果：

{
      "token" : "马拉巴尔",
      "start_offset" : 13,
      "end_offset" : 17,
      "type" : "CN_WORD",
      "position" : 9
    },
    {
      "token" : "马拉",
      "start_offset" : 13,
      "end_offset" : 15,
      "type" : "CN_WORD",
      "position" : 10
    },
    {
      "token" : "拉巴",
      "start_offset" : 14,
      "end_offset" : 16,
      "type" : "CN_WORD",
      "position" : 11
    },
    {
      "token" : "尔",
      "start_offset" : 16,
      "end_offset" : 17,
      "type" : "CN_CHAR",
      "position" : 12
    }

注意：添加自定义分词字典后需要重建索引，或者更新相关数据