如何避免此 java.io.IOException: 设备上没有剩余空间
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How to avoid this java.io.IOException: No space left on device
提问by Avinash
If my space is full I get sometimes following exception
如果我的空间已满，我有时会出现以下异常
java.io.IOException: No space left on device
at java.io.FileOutputStream.writeBytes(Native Method)
at java.io.FileOutputStream.write(FileOutputStream.java:282)
at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1847)
at java.io.ObjectOutputStream$BlockDataOutputStream.setBlockDataMode(ObjectOutputStream.java:1756)
at java.io.ObjectOutputStream.<init>(ObjectOutputStream.java:230)
Is there any way in Java to avoid this. I mean do not call write if no space
Java 中有什么方法可以避免这种情况。我的意思是如果没有空间就不要调用 write
采纳答案by Sotirios Delimanolis
Java 7 NIO offers the FileStoreclass to check the available size
Java 7 NIO 提供了FileStore检查可用大小的类
Path p = Paths.get("/your/file"); // where you want to write
FileSystem fileSystem = FileSystems.getDefault();
Iterable<FileStore> iterable = fileSystem.getFileStores();
Iterator<FileStore> it = iterable.iterator(); // iterate the FileStore instances
while(it.hasNext()) {
FileStore fileStore = it.next();
long sizeAvail = fileStore.getUsableSpace(); // or maybe getUnallocatedSpace()
if (Files.getFileStore(p).equals(fileStore) { // your Path belongs to this FileStore
if (sizeAvail > theSizeOfBytesYouWantToWrite) {
// do your thing
}
}
}
Obviously you can still get an IOExceptionas nothing is atomic and other processes might be using the same disk, so keep that in mind and handle the exception accordingly.
显然你仍然可以得到一个，IOException因为没有什么是原子的，其他进程可能正在使用同一个磁盘，所以请记住这一点并相应地处理异常。
回答by Scott Heaberlin
Just look at the File class documentation.
只需查看 File 类文档。
These new methods also include:
这些新方法还包括：
public long getTotalSpace()
public long getFreeSpace()
public long getUsableSpace()
