Java：使用Apache commons-IO 2.4在子目录中递归列出文件 [英] Java: list files recursively in subdirectories with Apache commons-IO 2.4

问题描述

我正在尝试在根目录及其子目录中列出扩展名为.xls的文件，使用以下代码与 Apache Commons-IO 2.4 图书馆。我正在检查集合< File> 的大小，但是它给出了0.我没有看到代码中哪里出错。你可以帮帮我吗？

I'm trying to list files with the extension ".xls" in the root directory and its sub-directories, using the following code with Apache Commons-IO 2.4 library. I am checking the size of the collection<File>, but it gives 0. I don't see where could be wrong in the code. Could you please help me with this?

public static void main(String[] args) throws IOException {

    File rootDir = new File(args[0]);

    Collection<File> files = FileUtils.listFiles(rootDir, new RegexFileFilter("[a-zA-Z].xls"), DirectoryFileFilter.DIRECTORY);

    System.out.println("collection size:" + files.size());

}

推荐答案

我找到了这是有效的：

    final String[] SUFFIX = {"xls"};  // use the suffix to filter

    File rootDir = new File(args[0]);

    Collection<File> files = FileUtils.listFiles(rootDir, SUFFIX, true);

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