Java文件复制

// 复制文件。如果目标文件存在，会被覆盖。
private static void copyFile(File srcFile, File destFile)
        throws IOException {
    FileInputStream inStream = new FileInputStream(srcFile);
    FileOutputStream outStream = new FileOutputStream(destFile);
    FileChannel inChannel = inStream.getChannel();
    FileChannel outChannel = outStream.getChannel();
    inChannel.transferTo(0, inChannel.size(), outChannel);
    inStream.close();
    inChannel.close();
    outStream.close();
    outChannel.close();
}

*** walker ***