前言：之前实现的需求由于导出时需要的时间过于长，需要优化采用多线程的方式进行导出

更改之后的代码：

首先创建excel的临时文件，并写入。然后创建线程池，调用zipArchiveOutputStream来写入图片和excel

@PostMapping("/export3")public void exportZip(HttpServletResponse response,@RequestParam(value = "startTime",required = false)String startTime,@RequestParam(value = "endTime",required = false)String endTime,@RequestParam(value = "deviceName",required = false)String deviceName) throws IOException {List<CutterImageVO> cutterImageVOList = cutterImageService.getCutterImageList(startTime,endTime,deviceName);long start = System.currentTimeMillis();String zipFileName = "豁口图片数据";response.setCharacterEncoding("utf-8");response.setContentType("application/zip");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(zipFileName + ".zip", "UTF-8"));//创建excel临时文件final File tempFile = File.createTempFile("tempExcel", ".xls");EasyExcel.write(tempFile.getCanonicalPath(),CutterImageVO.class).excelType(ExcelTypeEnum.XLS).registerWriteHandler(new ExcelHyperlinkHandler(1, new int[]{7})).sheet("豁口图片数据").doWrite(cutterImageVOList);logger.info("临时文件所在的本地路径：" + tempFile.getCanonicalPath());ExecutorService executor = new ThreadPoolExecutor(5, 10, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<>(20), new MyRejectedExecutionHandler());ParallelScatterZipCreator parallelScatterZipCreator = new ParallelScatterZipCreator(executor);OutputStream outputStream = response.getOutputStream();ZipArchiveOutputStream zipArchiveOutputStream = new ZipArchiveOutputStream(outputStream);zipArchiveOutputStream.setEncoding("UTF-8");try {for (int i = 0; i <= cutterImageVOList.size(); i++) {int finalI = i;String fileName = null;if (finalI == cutterImageVOList.size()) {fileName = "豁口图片数据.xls";} else {fileName = cutterImageVOList.get(i).getImageUrl();}String finalFileName = fileName;final InputStreamSupplier inputStreamSupplier = () -> {try {InputStream inputStream = null;if (finalI == cutterImageVOList.size()) {inputStream = new FileInputStream(tempFile.getCanonicalPath());} else {inputStream = minioUtil.getDownloadInputStream(finalFileName);}return inputStream;} catch (Exception e) {e.printStackTrace();return new NullInputStream(0);}};ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry(fileName);zipArchiveEntry.setMethod(ZipArchiveEntry.DEFLATED);zipArchiveEntry.setUnixMode(UnixStat.FILE_FLAG | 436);parallelScatterZipCreator.addArchiveEntry(zipArchiveEntry, inputStreamSupplier);}parallelScatterZipCreator.writeTo(zipArchiveOutputStream);}catch(Exception e){log.error("文件流读取失败",e);e.printStackTrace();}finally {IOUtils.closeQuietly(zipArchiveOutputStream);IOUtils.closeQuietly(outputStream);}//程序退出时删除临时文件tempFile.deleteOnExit();long end = System.currentTimeMillis();log.info("耗时:"+(end-start));}

Minio工具类

public InputStream getDownloadInputStream(String fileName) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {InputStream is = client.getObject(GetObjectArgs.builder().bucket(minioConfig.getBucketName()).object(fileName).build());return is;}