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# Token数 ## 简述 类型为`token_count`的字段是一个接受字符串值的[`integer`](https://www.elastic.co/guide/en/elasticsearch/reference/current/number.html)字段,对它们进行分析,然后对字符串中的token数进行索引。 ## 示例 例如: | `PUT my_index` `{` `"mappings"``: {` `"my_type"``: {` `"properties"``: {` `"name"``: {` `"type"``: ``"text"``,` `"fields"``: {` `"length"``: {` `"type"``:     ``"token_count"``,` `"analyzer"``: ``"standard"` `}` `}` `}` `}` `}` `}` `}` `PUT my_index/my_type/``1` `{ ``"name"``: ``"John Smith"` `}` `PUT my_index/my_type/``2` `{ ``"name"``: ``"Rachel Alice Williams"` `}` `GET my_index/_search` `{` `"query"``: {` `"term"``: {` `"name.length"``: ``3` `}` `}` `}` | | [![](https://www.elastic.co/guide/en/elasticsearch/reference/current/images/icons/callouts/1.png)](https://translate.googleusercontent.com/translate_c?depth=1&hl=zh-CN&rurl=translate.google.com&sl=en&sp=nmt4&tl=zh-CN&u=https://www.elastic.co/guide/en/elasticsearch/reference/current/token-count.html&usg=ALkJrhj-xw1n9gZS9tQ_tK5CUYOeTr55wA#CO186-1) | `name`字段是使用默认`standard`分析器的分析字符串字段。 | | [![](https://www.elastic.co/guide/en/elasticsearch/reference/current/images/icons/callouts/2.png)](https://translate.googleusercontent.com/translate_c?depth=1&hl=zh-CN&rurl=translate.google.com&sl=en&sp=nmt4&tl=zh-CN&u=https://www.elastic.co/guide/en/elasticsearch/reference/current/token-count.html&usg=ALkJrhj-xw1n9gZS9tQ_tK5CUYOeTr55wA#CO186-2) | `name.length`字段是一个`token_count` [多字段](https://www.elastic.co/guide/en/elasticsearch/reference/current/multi-fields.html) ,它将在`name`字段中索引token的数量。 | | [![](https://www.elastic.co/guide/en/elasticsearch/reference/current/images/icons/callouts/3.png)](https://translate.googleusercontent.com/translate_c?depth=1&hl=zh-CN&rurl=translate.google.com&sl=en&sp=nmt4&tl=zh-CN&u=https://www.elastic.co/guide/en/elasticsearch/reference/current/token-count.html&usg=ALkJrhj-xw1n9gZS9tQ_tK5CUYOeTr55wA#CO186-3) | 此查询仅匹配包含`Rachel Alice Williams`的文档,因为它包含三个token。 | ![注意](https://www.elastic.co/guide/en/elasticsearch/reference/current/images/icons/note.png) 在技术上, `token_count`类型对位置增量进行求和,而不是对token计数。 这意味着即使分析仪滤除停止词,它们也包括在计数中。 ## 参数 `token_count`字段接受以下参数: | [`analyzer`](https://www.elastic.co/guide/en/elasticsearch/reference/current/analyzer.html) | 应该用于分析字符串值的[分析器](https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis.html) 。必须值。 为获得最佳性能,请使用不带token过滤器的分析器。 | | [`boost`](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-boost.html) | 映射字段级查询时间提升。 接受一个浮点数,默认为`1.0` 。 | | [`doc_values`](https://www.elastic.co/guide/en/elasticsearch/reference/current/doc-values.html) | 该字段是否应该以多列的方式存储在磁盘上,以便以后可以将其用于排序,聚合或脚本化?接受`true` (默认)或`false` 。 | | [`index`](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-index.html) | 应该可以搜索该字段吗? 接受`not_analyzed` (默认)和`no` 。 | | [`include_in_all`](https://www.elastic.co/guide/en/elasticsearch/reference/current/include-in-all.html) | 字段值是否应包含在[`_all`](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-all-field.html)字段中? 接受`true`或`false` 默认为`false` 。 注意:如果为`true` ,则将字符串值添加到_all,而不是计算的token数量。 | | [`null_value`](https://www.elastic.co/guide/en/elasticsearch/reference/current/null-value.html) | 接受与替换任何显式`null`值的字段相同`type`的数值。 默认为`null` ,这意味着该字段被视为丢失。 | | [`store`](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-store.html) | 字段值是否应与[`_source`](https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-source-field.html)字段分开存储和检索。 接受`true`或`false` (默认)。 |