springBoot视频在线播放，支持快进，分片播放

1、主要是通过ResourceHttpRequestHandler类来实现，ResourceHttpRequestHandler本身支持分片加载，前端在请求头中携带Range: bytes = 0-5001，就可以从后台自动截取对应大小视频内容。

第一步，先自定义实现一个ResourceHttpRequestHandler。代码如下：

package com.tec666.moviebar.config;
 
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.resource.ResourceHttpRequestHandler;
 
import javax.servlet.http.HttpServletRequest;
 
/**
 * @author longge93
 */
@Component
public class NonStaticResourceHttpRequestHandler extends ResourceHttpRequestHandler {
 
    public final static String ATTR_FILE = "NON-STATIC-FILE";
 
    @Override
    protected Resource getResource(HttpServletRequest request) {
        String filePath =  (String) request.getAttribute(ATTR_FILE);
        return new FileSystemResource(filePath);
    }
}

第二步，在视频播放controller中，把本地文件路径传入ResourceHttpRequestHandler。代码如下：

@Controller
@RequestMapping(value = "/api/baseResource")
public class BaseSourceApiController {
 
  
    @Autowired
    private NonStaticResourceHttpRequestHandler nonStaticResourceHttpRequestHandler;
 
 
    private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
    @RequestMapping(value = "/video", method = RequestMethod.GET)
    public void video(
            HttpServletRequest request,
            HttpServletResponse response
    ) {
        try {
            String path = "D:/abc.mp4";
            File file = new File(path);
            if (file.exists()) {
                request.setAttribute(NonStaticResourceHttpRequestHandler.ATTR_FILE, path);
                nonStaticResourceHttpRequestHandler.handleRequest(request, response);
            } else {
                response.setStatus(HttpServletResponse.SC_NOT_FOUND);
                response.setCharacterEncoding(StandardCharsets.UTF_8.toString());
            }
        } catch (Exception e) {
 
        }
    }
}