SpringBoot 返回图片、Excel、音视频等流数据几种处理方式

方式一：直接针对响应对象（response）实现

@RestController
@Slf4j
@Api(tags = SwaggerConfig.TAG_IMAGE)
@RequestMapping(SwaggerConfig.TAG_IMAGE)
public class ImageController {@GetMapping(value = "/getImage")@ApiOperation("获取图片-以ImageIO流形式写回")public void getImage(HttpServletResponse response) throws IOException {OutputStream os = null;try {// 读取图片BufferedImage image = ImageIO.read(new FileInputStream(new File("F:\\谷歌下载\\未命名文件.png")));response.setContentType("image/png");os = response.getOutputStream();if (image != null) {ImageIO.write(image, "png", os);}} catch (IOException e) {log.error("获取图片异常{}",e.getMessage());} finally {if (os != null) {os.flush();os.close();