In some applications, such as transaction processing, it is necessary to ensure that an update has been made to the disk. FileDescriptor.sync()
blocks until all changes to a file are written to disk.
try {
// Open or create the output file
FileOutputStream os = new FileOutputStream("outfilename");
FileDescriptor fd = os.getFD();
// Write some data to the stream
byte[] data = new byte[]{(byte)0xCA, (byte)0xFE, (byte)0xBA, (byte)0xBE};
os.write(data);
// Flush the data from the streams and writers into system buffers.
// The data may or may not be written to disk.
os.flush();
// Block until the system buffers have been written to disk.
// After this method returns, the data is guaranteed to have
// been written to disk.
fd.sync();
} catch (IOException e) {
}
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posted on 2006-06-13 12:01
zhyiwww 阅读(255)
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