英文:
file.listRoots not working for a portable USB drive in Java
问题
file.listRoots()对于内部文件驱动器信息运行良好，但无法获取USB和便携式文件信息。以下是我的代码：
File[] paths;
try {
// 返回文件和目录的路径名
paths = File.listRoots();
for (File path : paths) // 对于路径名数组中的每个路径名
System.out.println(path); // 打印文件和目录路径
} catch(Exception e) { // 如果出现任何错误
e.printStackTrace();
}
我不明白为什么我的便携式USB信息无法获取？
英文:
file.listRoots() works fine for internal file drive information, but is not getting USB and portable file info. Here is my code:
File[] paths;
try {
// returns pathnames for files and directory
paths = File.listRoots();
for (File path : paths) // for each pathname in pathname array
System.out.println(path); // prints file and directory paths
} catch(Exception e) { // if any error occurs
e.printStackTrace();
}
I don't understand why does my portable USB info not fetch?
答案1
得分: 2
如果您的USB驱动器已连接并且可以访问，您可以检查NIO代码是否如下显示卷：
for (Path root : FileSystems.getDefault().getRootDirectories()) {
FileStore fs = Files.getFileStore(root);
System.out.format("FileStore %s\tName: '%s'\tType: %s%n", root, fs.name(), fs.type());
System.out.println();
}
在上述循环内，您还可以检查其他文件系统属性，如可移动存储标志：
String[] attrs = new String[]{"volume:isRemovable"};
for (String s : attrs) {
System.out.format("\t%s=%s", s, fs.getAttribute(s));
}
英文:
If your USB drive is connected and is accessible, you could check whether NIO code shows the volumes as follows:
for (Path root : FileSystems.getDefault().getRootDirectories()) {
FileStore fs = Files.getFileStore(root);
System.out.format("FileStore %s\tName: '%s'\tType: %s%n", root, fs.name(), fs.type());
System.out.println();
}
Inside above loop you can also check other filesystem attributes such as removable storage flag:
String[] attrs = new String[]{"volume:isRemovable"};
for (String s : attrs) {
System.out.format("\t%s=%s", s, fs.getAttribute(s));
}
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