1、預設的分詞器
standard
standard tokenizer：以單詞邊界進行切分
standard token filter：什麼都不做
lowercase token filter：將所有字母轉換為小寫
stop token filer（預設被禁用）：移除停用詞，比如a the it等等
2、修改分詞器的設定
啟用english停用詞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、定製化自己的分詞器
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"
}
}
}