合并音频文件

最新推荐文章于 2025-01-03 15:28:59 发布

coldcp

最新推荐文章于 2025-01-03 15:28:59 发布

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CC 4.0 BY-SA版权

文章标签： java 开发语言

本文链接：https://blog.youkuaiyun.com/coldcp/article/details/127978736

本文介绍了一种使用RandomAccessFile和BufferedInputStream实现的大文件合并方法。该方法将多个临时小文件按顺序合并成一个完整的大文件，适用于多部分上传后的文件整合场景。

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private void mergeFile(File endFile , List<File> tempFiles) {
        File[] files = new File[tempFiles.size()];
        for (int i = 0; i < files.length; i++) {
            file = mergeFile(endFile, files[i], file.length());
        }
    }

public File mergeFile(File mergeFile, File partFile, long startPosition) {

        RandomAccessFile randomAccessFile;
        try {
            randomAccessFile = new RandomAccessFile(mergeFile, "rw");
            randomAccessFile.seek(startPosition);
            byte[] buffer = new byte[BUFFER_SIZE];
            InputStream input = new FileInputStream(partFile);
//            InputStream input = partFile.getInputStream();
            BufferedInputStream in = new BufferedInputStream(input, BUFFER_SIZE);
            int len;
            try {
                while ((len = in.read(buffer, 0, BUFFER_SIZE)) != -1) {
                    randomAccessFile.write(buffer, 0, len);
                }
            } finally {
                in.close();
                input.close();
                randomAccessFile.close();
            }
            return mergeFile;
        } catch (Exception e) {
            return null;
        }
    }