一需求查看发票详情需要跳转第三方页面然后右键复制图片保存到本地。一个个下载太麻烦最后是从html中获取图片元素转为字节流下载压缩到同一个文件夹二pom依赖dependency groupIdorg.jsoup/groupId artifactIdjsoup/artifactId version1.17.2/version /dependency三压缩成zip文件PostMapping(/qrcodes) ApiOperation(测试导票据图片) public ResponseEntitybyte[] exportQrCodes(RequestBody(required false) InvoiceSummary invoiceSummary) { try { // 数据 byte[] zipData exportQrCodesToZip(invoiceSummary); // 生成文件名带时间戳 String timestamp new SimpleDateFormat(yyyyMMdd_HHmmss).format(new Date()); String fileName qrcodes_ timestamp .zip; String encodedFileName URLEncoder.encode(fileName, StandardCharsets.UTF_8.name()) .replaceAll(\\, %20); // 返回文件流浏览器会自动下载到默认下载文件夹 return ResponseEntity.ok() .header(HttpHeaders.CONTENT_DISPOSITION, attachment; filename*UTF-8 encodedFileName) .contentType(MediaType.APPLICATION_OCTET_STREAM) .body(zipData); } catch (Exception e) { return ResponseEntity.internalServerError().build(); } }四获取需要处理的列表public byte[] exportQrCodesToZip(InvoiceSummary invoiceSummary) { // 查询所有有二维码的数据 //示例数据 MapString,Object map1 invoiceSummaryService.selectInvoiceSummaryByIdByAPP(520541L); MapString,Object map2 invoiceSummaryService.selectInvoiceSummaryByIdByAPP(568177L); ListMapString,Object listnew ArrayList(); list.add(map1); list.add(map2); if (CollectionUtils.isEmpty(list)) { throw new RuntimeException(没有找到数据); } System.err.println(开始导出共{}张二维码 list.size()); ByteArrayOutputStream baos new ByteArrayOutputStream(); try (ZipOutputStream zos new ZipOutputStream(baos)) { int successCount 0; int failCount 0; for (MapString, Object entity : list) { String pictureUrl entity.get(pictureUrl).toString(); if (pictureUrl null || pictureUrl.isEmpty()) { continue; } String fileName; try { // 1. 获取页面HTML String html TestBillDownload.fetchPageHtml(pictureUrl); System.out.println(页面加载成功HTML长度: html.length()); // 2. 从页面中提取正确的参数 String imageUrl TestBillDownload.buildImageUrlFromPage(html); if (imageUrl ! null !imageUrl.isEmpty()) { System.out.println(构建图片URL成功: imageUrl); fileName bill_image_ System.currentTimeMillis() .jpg; } else { System.out.println(构建图片URL失败); throw new ServiceException(); } // 2. 获取图片byte[] byte[] imageBytes TestBillDownload.fetchImageBytes(imageUrl); if (imageBytes ! null imageBytes.length 0) { System.out.println(获取图片成功大小: imageBytes.length 字节 ( (imageBytes.length / 1024) KB)); } // 添加到ZIP文件 ZipEntry entry new ZipEntry(fileName); zos.putNextEntry(entry); zos.write(imageBytes); zos.closeEntry(); successCount; if (successCount % 100 0) { System.err.println(已打包 {} 张 successCount); } // 添加小延迟避免请求过快 Thread.sleep(100); } catch (Exception e) { System.err.println(处理图片失败: pictureUrl , 错误: e.getMessage()); failCount; // 继续处理下一张不要中断整个流程 } } System.err.println(打包完成成功 successCount 张失败 failCount 张); // 注意return 要放在循环外面 return baos.toByteArray(); } catch (IOException e) { throw new RuntimeException(e); } }五工具类public static String fetchPageHtml(String url) throws Exception { Request request new Request.Builder() .url(url) .header(User-Agent, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36) .header(Accept, text/html,application/xhtmlxml,application/xml;q0.9,image/webp,*/*;q0.8) .header(Accept-Language, zh-CN,zh;q0.9,en;q0.8) .header(Cache-Control, no-cache) .build(); try (Response response client.newCall(request).execute()) { if (!response.isSuccessful()) { throw new RuntimeException(页面加载失败: response.code()); } return response.body().string(); } }public static String buildImageUrlFromPage(String html) { String ciphertext null; String appId null; String method null; // 1. 提取 ciphertext Pattern cipherPattern Pattern.compile( var\\sciphertext\\s*\\s*[\]([^\])[\], Pattern.CASE_INSENSITIVE ); Matcher cipherMatcher cipherPattern.matcher(html); if (cipherMatcher.find()) { ciphertext cipherMatcher.group(1); System.out.println(提取到 ciphertext: ciphertext); } else { System.out.println(未找到 ciphertext); return null; } // 2. 提取 appId Pattern appIdPattern Pattern.compile( var\\sappId\\s*\\s*[\]([^\])[\], Pattern.CASE_INSENSITIVE ); Matcher appIdMatcher appIdPattern.matcher(html); if (appIdMatcher.find()) { appId appIdMatcher.group(1); System.out.println(提取到 appId: appId); } else { System.out.println(未找到 appId); return null; } // 3. 提取 method Pattern methodPattern Pattern.compile( var\\smethod\\s*\\s*[\]([^\])[\], Pattern.CASE_INSENSITIVE ); Matcher methodMatcher methodPattern.matcher(html); if (methodMatcher.find()) { method methodMatcher.group(1); System.out.println(提取到 method: method); } else { // method 可能没有定义使用默认值 method DISPLAYH5; System.out.println(未找到 method使用默认值: method); } // 4. 构建图片URL String imageUrl http://211.159.155.25:8001/colleges-proxy/peripheral/queryBill/queryEbillImg.do ?ciphertext ciphertext appId appId method method; return imageUrl; }public static byte[] fetchImageBytes(String imageUrl) throws Exception { // 构建请求 Request request new Request.Builder() .url(imageUrl) .header(User-Agent, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36) .header(Referer, http://211.159.155.25:8001/) .header(Accept, image/webp,image/apng,image/*,*/*;q0.8) .header(Accept-Language, zh-CN,zh;q0.9,en;q0.8) .header(Connection, keep-alive) .build(); try (Response response client.newCall(request).execute()) { // 检查响应状态 if (!response.isSuccessful()) { throw new RuntimeException(下载失败HTTP状态码: response.code() , 消息: response.message()); } // 获取Content-Type可选用于验证 String contentType response.header(Content-Type); System.out.println(Content-Type: contentType); // 直接返回byte[] byte[] imageBytes response.body().bytes(); System.out.println(实际获取大小: imageBytes.length 字节 ( (imageBytes.length / 1024) KB)); return imageBytes; } }六结果