原英文版地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/test-analyzer.html, 原文档版权归 www.elastic.co 所有
本地英文版地址: ../en/test-analyzer.html
本地英文版地址: ../en/test-analyzer.html
重要: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 当前版本文档。
Test an analyzeredit
The analyze API is an invaluable tool for viewing the
terms produced by an analyzer. A built-in analyzer can be specified inline in
the request:
POST _analyze
{
"analyzer": "whitespace",
"text": "The quick brown fox."
}
The API returns the following response:
{
"tokens": [
{
"token": "The",
"start_offset": 0,
"end_offset": 3,
"type": "word",
"position": 0
},
{
"token": "quick",
"start_offset": 4,
"end_offset": 9,
"type": "word",
"position": 1
},
{
"token": "brown",
"start_offset": 10,
"end_offset": 15,
"type": "word",
"position": 2
},
{
"token": "fox.",
"start_offset": 16,
"end_offset": 20,
"type": "word",
"position": 3
}
]
}
You can also test combinations of:
- A tokenizer
- Zero or more token filters
- Zero or more character filters
POST _analyze
{
"tokenizer": "standard",
"filter": [ "lowercase", "asciifolding" ],
"text": "Is this déja vu?"
}
The API returns the following response:
{
"tokens": [
{
"token": "is",
"start_offset": 0,
"end_offset": 2,
"type": "<ALPHANUM>",
"position": 0
},
{
"token": "this",
"start_offset": 3,
"end_offset": 7,
"type": "<ALPHANUM>",
"position": 1
},
{
"token": "deja",
"start_offset": 8,
"end_offset": 12,
"type": "<ALPHANUM>",
"position": 2
},
{
"token": "vu",
"start_offset": 13,
"end_offset": 15,
"type": "<ALPHANUM>",
"position": 3
}
]
}
Alternatively, a custom analyzer can be
referred to when running the analyze API on a specific index:
PUT my_index
{
"settings": {
"analysis": {
"analyzer": {
"std_folded": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"asciifolding"
]
}
}
}
},
"mappings": {
"properties": {
"my_text": {
"type": "text",
"analyzer": "std_folded"
}
}
}
}
GET my_index/_analyze
{
"analyzer": "std_folded",
"text": "Is this déjà vu?"
}
GET my_index/_analyze
{
"field": "my_text",
"text": "Is this déjà vu?"
}
The API returns the following response:
{
"tokens": [
{
"token": "is",
"start_offset": 0,
"end_offset": 2,
"type": "<ALPHANUM>",
"position": 0
},
{
"token": "this",
"start_offset": 3,
"end_offset": 7,
"type": "<ALPHANUM>",
"position": 1
},
{
"token": "deja",
"start_offset": 8,
"end_offset": 12,
"type": "<ALPHANUM>",
"position": 2
},
{
"token": "vu",
"start_offset": 13,
"end_offset": 15,
"type": "<ALPHANUM>",
"position": 3
}
]
}