1、默认的分词器

standard 分词器

standard tokenizer：以单词边界进行切分

standard token filter：什么都不做

lowercase token filter：将所有字母转换为小写

stop token filer（默认被禁用）：移除停用词，比如a the it等等

2、修改分词器的设置

启用english停用词token filter

PUT /my_index{  "settings": {    "analysis": {      "analyzer": {        "es_std": {          "type": "standard",          "stopwords": "_english_"        }      }    }  }}GET /my_index/_analyze{  "analyzer": "standard",   "text": "a dog is in the house"}GET /my_index/_analyze{  "analyzer": "es_std",  "text":"a dog is in the house"}

3、定制化自己的分词器

1.&字符转换

2.停用某些词

3.大小写转换

PUT /my_index{  "settings": {    "analysis": {      "char_filter": {        "&_to_and": {          "type": "mapping",          "mappings": ["&=> 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": "tom&jerry are a friend in the house, , HAHA!!",  "analyzer": "my_analyzer"}PUT /my_index/_mapping/my_type{  "properties": {    "content": {      "type": "text",      "analyzer": "my_analyzer"    }  }}