JAVA功能代码《12》----使用NIO快速复制文件

12.使用NIO快速复制文件

public static void fileCopy(File in, File out) throws IOException {
		FileChannel inChannel = new FileInputStream(in).getChannel();
		FileChannel outChannel = new FileOutputStream(out).getChannel();
		try {
			inChannel.transferTo(0, inChannel.size(), outChannel);
			// original -- apparently has trouble copying large files on Windows
			// magic number for Windows, 64Mb - 32Kb)
			int maxCount = (64 * 1024 * 1024) - (32 * 1024);
			long size = inChannel.size();
			long position = 0;
			while (position < size) {
				position += inChannel
						.transferTo(position, maxCount, outChannel);
			}
		} finally {
			if (inChannel != null) {
				inChannel.close();
			}
			if (outChannel != null) {
				outChannel.close();
			}
		}
	}

评论

1 楼 山川尽美 2015-06-08  

FileChannel inChannel = new FileInputStream(in).getChannel(); 
FileChannel outChannel = new FileOutputStream(out).getChannel();
报错？ 要求将in---String类型？
对吗？