Class FileIterator
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
FileIterator
一个迭代器,可让脚本迭代可能非常大的文件集合。您可以通过 DriveApp
或 Folder
访问文件迭代器。
// Log the name of every file in the user's Drive.
const files = DriveApp.getFiles();
while (files.hasNext()) {
const file = files.next();
Logger.log(file.getName());
}
详细文档
getContinuationToken()
获取一个令牌,以便稍后恢复此迭代。如果在一次执行中处理迭代器会超出最长执行时间,此方法非常有用。接续令牌通常有效期为一周。
返回
String
- 一个接续令牌,可用于使用令牌生成时迭代器中保留的项来继续此迭代
hasNext()
确定调用 next()
是否会返回项。
返回
Boolean
- 如果 next()
会返回项,则为 true
;否则为 false
next()
获取文件或文件夹集合中的下一个项。如果没有剩余项,则会抛出异常。
返回
File
- 集合中的下一项
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-26。
[null,null,["最后更新时间 (UTC):2025-07-26。"],[[["\u003cp\u003eFileIterator allows scripts to iterate over a large collection of files within Google Drive, accessible via \u003ccode\u003eDriveApp\u003c/code\u003e or a \u003ccode\u003eFolder\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eIt provides methods to check for more files (\u003ccode\u003ehasNext()\u003c/code\u003e), retrieve the next file (\u003ccode\u003enext()\u003c/code\u003e), and manage long iterations with continuation tokens (\u003ccode\u003egetContinuationToken()\u003c/code\u003e).\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003egetContinuationToken()\u003c/code\u003e helps to resume iterations that might exceed execution time limits, with tokens typically valid for a week.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003ehasNext()\u003c/code\u003e returns \u003ccode\u003etrue\u003c/code\u003e if there are more files to iterate, allowing scripts to control the loop.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003enext()\u003c/code\u003e retrieves the subsequent file in the collection, throwing an exception if none remain.\u003c/p\u003e\n"]]],[],null,["# Class FileIterator\n\nFileIterator\n\nAn iterator that allows scripts to iterate over a potentially large collection of files. File\niterators can be accessed from [DriveApp](/apps-script/reference/drive/drive-app) or a [Folder](/apps-script/reference/drive/folder).\n\n```javascript\n// Log the name of every file in the user's Drive.\nconst files = DriveApp.getFiles();\nwhile (files.hasNext()) {\n const file = files.next();\n Logger.log(file.getName());\n}\n``` \n\n### Methods\n\n| Method | Return type | Brief description |\n|---------------------------------------------------|-------------------------------------------|-------------------------------------------------------------------------|\n| [getContinuationToken()](#getContinuationToken()) | `String` | Gets a token that can be used to resume this iteration at a later time. |\n| [hasNext()](#hasNext()) | `Boolean` | Determines whether calling [next()](#next()) will return an item. |\n| [next()](#next()) | [File](/apps-script/reference/drive/file) | Gets the next item in the collection of files or folders. |\n\nDetailed documentation\n----------------------\n\n### `get``Continuation``Token()`\n\nGets a token that can be used to resume this iteration at a later time. This method is useful\nif processing an iterator in one execution would exceed the maximum execution time.\nContinuation tokens are generally valid for one week.\n\n#### Return\n\n\n`String` --- a continuation token that can be used to resume this iteration with the items that\nremained in the iterator when the token was generated\n\n*** ** * ** ***\n\n### `has``Next()`\n\nDetermines whether calling [next()](#next()) will return an item.\n\n#### Return\n\n\n`Boolean` --- `true` if [next()](#next()) will return an item; `false` if not\n\n*** ** * ** ***\n\n### `next()`\n\nGets the next item in the collection of files or folders. Throws an exception if no items\nremain.\n\n#### Return\n\n\n[File](/apps-script/reference/drive/file) --- the next item in the collection"]]