随着国内带宽降费提速日益普及，与此同时移动通信技术也进一步提升，视频，直播这一类业务需求都离不开推流这一核心技术点。最近尝试了一次SpringMVC的H264流响应方法，SpringMVC提供了一个ResourceRegion对象，类比于RandomAccessFile，其抽象了资源的随机位置响应方法，所以只要用ResourceRegion响应，即可完成一个简单的H264流响应。

@GetMapping("/play/{name}")
public ResponseEntity<ResourceRegion> play(@PathVariable("name") String name,@RequestHeader HttpHeaders httpHeaders) throws IOException {
    UrlResource video =new UrlResource("file:"+ARCHIVE_DIR_STR+"/"+name+".mp4");
    ResourceRegion resourceRegion = resourceRegion(video, httpHeaders);
    return ResponseEntity.status(HttpStatus.PARTIAL_CONTENT)
            .contentType(MediaTypeFactory
                    .getMediaType("video/mp4")
                    .orElse(MediaType.APPLICATION_OCTET_STREAM))
            .body(resourceRegion);
}
private ResourceRegion resourceRegion(UrlResource video, HttpHeaders headers) throws IOException {
    long contentLength = video.contentLength();
    HttpRange range = headers.getRange().get(0);
     if (range != null) {
        long start = range.getRangeStart(contentLength);
        long end = range.getRangeEnd(contentLength);
        long rangeLength = Math.min(1 * 1024 * 1024, end - start + 1);
        return new ResourceRegion(video, start, rangeLength);
    } else {
        long rangeLength = Math.min(1 * 1024 * 1024, contentLength);
        return new ResourceRegion(video, 0, rangeLength);
    }
}

现代浏览器普遍都支持了video的tag，所以只需要在video的tag里面设置source为SpringMVC的流响应接口即可完成通过浏览器源生播放器进行播放，当然要想实现如倍速、快捷键等更多功能也可以通过其他开源播放器项目进行定制。

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>PlayPage</title>
</head>
<body>
<video autoplay="autoplay" controls>
    <source src="/play/name" type="video/mp4">
</video>
</body>
</html>