欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

java中使用IO将文件切割后保存(FileInputStream、FileOutputStream)

程序员文章站 2022-03-27 07:52:13
...

直接代码:

public class Demo {
	public static void main(String[] args) throws IOException {
		
		split(new File("c:\\a.mp3"), 10, new File("c:\\"));
		System.out.println("切割完毕");

		LinkedHashSet<InputStream> hs = new LinkedHashSet<InputStream>();	
		hs.add(new FileInputStream(new File("c:\\part.1.mp3")));
		hs.add(new FileInputStream(new File("c:\\part.2.mp3")));
		hs.add(new FileInputStream(new File("c:\\part.3.mp3")));
		hs.add(new FileInputStream(new File("c:\\part.4.mp3")));
		merage(hs, new File("c:\\merage.mp3"));
		System.out.println("合并完毕");
	}

	private static void merage(LinkedHashSet<InputStream> hs, File dest)
			throws IOException {

		final Iterator<InputStream> it = hs.iterator();
		FileOutputStream fos = new FileOutputStream(dest);
		SequenceInputStream seq = new SequenceInputStream(
				new Enumeration<InputStream>() {

					@Override
					public boolean hasMoreElements() {

						return it.hasNext();
					}

					@Override
					public InputStream nextElement() {
						return it.next();
					}
				});
		byte[] byt = new byte[1024 * 1024];
		int len = 0;
		while ((len = seq.read(byt)) != -1) {
			fos.write(byt, 0, len);
		}
		seq.close();
		fos.close();
	}

	// 1. 切割文件
	/*
	 * 切割文件,切割份数, 切割后保存路径
	 */
	private static void split(File src, int count, File dir) throws IOException {
		FileInputStream fis = new FileInputStream(src);
		FileOutputStream fos = null;
		byte[] byt = new byte[1024 * 1024];
		int len = 0;
		for (int i = 1; i <= count; i++) {
			len = fis.read(byt);
			if (len != -1) {
				fos = new FileOutputStream(dir + "part." + i + ".mp3");
				fos.write(byt, 0, len);
			}

			// fos.close();

		}
		fis.close();

	}
}


相关标签: 切割文件