问题：
在开发项目中，遇到前端传递多个图片URL到后端，实现图片的批量下载并压缩为Zip。
业务代码：
Controller
@PostMapping("/batchDownload") public void batchDownload(@RequestBody PassportDTO passportDTO, HttpServletResponse response) { passportService.batchDownload(passportDTO, response); }
Service
public void batchDownload(PassportDTO passportDTO, HttpServletResponse response) { String zipName = "通行证" + ".zip"; response.setHeader("content-type", "application/octet-stream"); response.setHeader("Content-disposition", "attachment;filename=" + zipName); response.setCharacterEncoding("utf-8"); ZipOutputStream zipOutputStream = null; try { zipOutputStream = new ZipOutputStream(response.getOutputStream()); for (String pictureUrl : passportDTO.getPictureUrls()) { String fileName = pictureUrl.substring(pictureUrl.lastIndexOf("/") + 1); zipOutputStream.putNextEntry(new ZipEntry(fileName)); URL url = new URL(pictureUrl); InputStream inputStream = new DataInputStream(url.openStream()); byte[] buff = new byte[1024]; int len; while ((len = inputStream.read(buff)) != -1) { zipOutputStream.write(buff, 0, len); } zipOutputStream.closeEntry(); inputStream.close(); } } catch (Exception e) { e.printStackTrace(); } finally { if (zipOutputStream != null) { try { zipOutputStream.close(); } catch (IOException e) { e.printStackTrace(); } } } }
说明：
通过图片路径创建输入流获取图片数据：
File file = new File("/test/temp/vehicles/" + pictureUrl); InputStream inputStream = new FileInputStream(file);
通过图片URL路径创建输入流获取图片数据：
URL url = new URL(pictureUrl); InputStream inputStream = new DataInputStream(url.openStream());
路漫漫其修远兮，吾将上下而求索
译文：在追寻真理方面，前方的道路还很漫长，但我将百折不挠，不遗余力地去追求和探索。
如果您有什么好的想法与 ，欢迎在评论区留言，我们一起讨论~
