解决html5中的video标签ios系统中无法播放使用的问题html5用video标签流式加载的实现Html5 video标签视频的最佳实践html5自定义video标签的海报与播放按钮功能html5视频媒体标签video的使用方法及完整参数说明详解详解Html5中video标签那些属性和方法

 private void sendVideo(HttpServletRequest request, HttpServletResponse response, File file, String fileName) throws FileNotFoundException, IOException { RandomAccessFile randomFile = new RandomAccessFile(file, "r");//只读模式 long contentLength = randomFile.length(); String range = request.getHeader("Range"); int start = 0, end = 0; if(range != null && range.startsWith("bytes=")){ String[] values = range.split("=")[1].split("-"); start = Integer.parseInt(values[0]); if(values.length > 1){ end = Integer.parseInt(values[1]); } } int requestSize = 0; if(end != 0 && end > start){ requestSize = end - start + 1; } else { requestSize = Integer.MAX_VALUE; } response.setContentType("video/mp4"); response.setHeader("Accept-Ranges", "bytes"); response.setHeader("ETag", fileName); response.setHeader("Last-Modified", new Date().toString()); //第一次请求只返回content length来让客户端请求多次实际数据 if(range == null){ response.setHeader("Content-length", contentLength + ""); }else{ //以后的多次以断点续传的方式来返回视频数据 response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);//206 long requestStart = 0, requestEnd = 0; String[] ranges = range.split("="); if(ranges.length > 1){ String[] rangeDatas = ranges[1].split("-"); requestStart = Integer.parseInt(rangeDatas[0]); if(rangeDatas.length > 1){ requestEnd = Integer.parseInt(rangeDatas[1]); } } long length = 0; if(requestEnd > 0){ length = requestEnd - requestStart + 1; response.setHeader("Content-length", "" + length); response.setHeader("Content-Range", "bytes " + requestStart + "-" + requestEnd + "/" + contentLength); }else{ length = contentLength - requestStart; response.setHeader("Content-length", "" + length); response.setHeader("Content-Range", "bytes "+ requestStart + "-" + (contentLength - 1) + "/" + contentLength); } } ServletOutputStream out = response.getOutputStream(); int needSize = requestSize; randomFile.seek(start); while(needSize > 0){ byte[] buffer = new byte[4096]; int len = randomFile.read(buffer); if(needSize < buffer.length){ out.write(buffer, 0, needSize); } else { out.write(buffer, 0, len); if(len < buffer.length){ break; } } needSize -= buffer.length; } randomFile.close(); out.close(); }