java下载接口实现图片视频进行预览，其他文件下载

主要的是设置response.addHeader，直接上代码

public void download2(HttpServletResponse response, String bucketName, String minFileName) {
        InputStream fileInputStream = null;
        //获取文件后缀
        String fileType = minFileName.substring(minFileName.indexOf(".") + 1);
        try {
            //mp4视频
            if("mp4".equals(fileType)){
                //我这里的访问路径是http开头的（minio文件服务器）
                URL url=new URL(“文件路径”);
                URLConnection connection = url.openConnection();
                fileInputStream = connection.getInputStream();
                response.addHeader("Content-Type","video/mp4;charset=UTF-8");
            }else {
            	//我这里是minio文件服务器获取流
                fileInputStream = client.getObject(GetObjectArgs.builder()
                        .bucket(bucketName)
                        .object(minFileName).build());
                if ("jpg".equals(fileType) || "png".equals(fileType) || "gif".equals(fileType)) {
                    response.setContentType("image/" + fileType);
                } else {
                   //如果是其他方式进行下载操作
                    String filename = URLEncoder.encode(minFileName.substring(minFileName.indexOf("-") + 1),"UTF-8");
                    response.setHeader("Content-Disposition", "attachment;filename=" + filename);
                    response.setContentType("application/force-download");
                    response.setCharacterEncoding("UTF-8");
                }
            }
            //流转换
             IOUtils.copy(fileInputStream, response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭流
            if (Objects.nonNull(fileInputStream)) {
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

response.addHeader（）参数有哪些，该博主地址有统计https://blog.csdn.net/weixin_41926301/article/details/83827032