java 使用 aws s3 sdk 通过分段下载来实现 html 页面 video 的断点播放、拖动进度播放

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        1. Java 视频流分段返回

1. java 拉取 aws s3 视频流返回给浏览器：

    @Overridepublic void playVideo(Long fileLength,String key,HttpServletRequest request,HttpServletResponse response) {OutputStream outputStream = null;S3ObjectInputStream s3ObjectInputStream = null;try {outputStream = response.getOutputStream();// 获取从哪个字节开始读取文件String rangeHeader = request.getHeader("Range");if (rangeHeader == null) {response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Required 'Range' header is missing");return;}long startByte = 0;long endByte = fileLength - 1;if (rangeHeader.startsWith("bytes=")) {String[] rangeParts = rangeHeader.substring(6).split("-");startByte = Long.parseLong(rangeParts[0]);endByte = rangeParts.length > 1 ? startByte : fileLength - 1;}if (startByte > endByte || startByte < 0 || endByte >= fileLength) {response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE, "Requested range not satisfiable");return;}// 设置响应头response.setHeader("Content-Type", "video/mp4");response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);response.setHeader("Content-Range", "bytes " + startByte + "-" + endByte + "/" + fileLength);// 从S3获取视频流GetObjectRequest getObjectRequest = new GetObjectRequest(this.fileBucket, key).withRange(startByte, endByte + 1);S3Object s3Object = this.amazonS3.getObject(getObjectRequest);s3ObjectInputStream = s3Object.getObjectContent();// 将视频流响应给客户端byte[] buffer = new byte[1024 * 1024]; // 使用1MB的缓冲区int bytesRead;long totalBytesRead = 0;while ((bytesRead = s3ObjectInputStream.read(buffer)) != -1 && totalBytesRead <= (endByte - startByte + 1)) {outputStream.write(buffer, 0, bytesRead);totalBytesRead += bytesRead;}response.setContentLength((int) (endByte - startByte + 1)); // 设置实际返回的数据长度} catch (Exception e) {// 处理异常log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e );// 处理异常try {response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Internal server error");}catch ( Exception e ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e );}}finally {if( outputStream != null ){try {outputStream.close();}catch ( Exception e1 ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e1 );}}if( s3ObjectInputStream != null ){try {s3ObjectInputStream.close();}catch ( Exception e1 ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e1 );}}}}

2. java读物本地视频文件返回给浏览器:

    @Overridepublic void playVideo(HttpServletRequest request, HttpServletResponse response) {RandomAccessFile randomAccessFile = null;OutputStream outputStream = null;try {response.reset();// File file = new File("D:\\素材\\视频\\crazy_max_small.mp4");File file = new File("D:\\视频\\888.mp4");long fileLength = file.length();// 随机读文件randomAccessFile = new RandomAccessFile(file, "r");//获取从那个字节开始读取文件String rangeString = request.getHeader("Range");System.out.println(rangeString);long range=0;if (rangeString!=null) {range = Long.valueOf(rangeString.substring(rangeString.indexOf("=") + 1, rangeString.indexOf("-")));}//获取响应的输出流outputStream = response.getOutputStream();//设置内容类型response.setHeader("Content-Type", "video/mp4");//返回码需要为206，代表只处理了部分请求，响应了部分数据response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);// 移动访问指针到指定位置randomAccessFile.seek(range);// 每次请求只返回1MB的视频流byte[] bytes = new byte[1024 * 1024];int len = randomAccessFile.read(bytes);//设置此次相应返回的数据长度response.setContentLength(len);//设置此次相应返回的数据范围response.setHeader("Content-Range", "bytes "+range+"-"+(fileLength-1)+"/"+fileLength);// 将这1MB的视频流响应给客户端outputStream.write(bytes, 0, len);System.out.println("返回数据区间:【"+range+"-"+(range+len)+"】");}catch ( Exception e ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e );// 处理异常try {response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Internal server error");}catch ( Exception e1 ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e1 );}}finally {if( outputStream != null){try {outputStream.close();}catch ( Exception e){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e );}}if( randomAccessFile != null ){try {randomAccessFile.close();}catch ( Exception e ){log.error( CommonConstans.EXCEPTION_LOG_PREFIX,e );}}}