1.zip打包批量下載檔案，拿到即可用

@Slf4j
public class ZipDownloadUtil {
    /**
     * zip打包下載
     */
    public void zipDownload(HttpServletResponse response, String wordPath, String zipFileName, List<File> fileList) {
        //生成快取資料夾名
        String zipPath = wordPath + File.separator + "cache" + File.separator + zipFileName;
        
 
try {
            //建立zip輸出流
            try (ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipPath))) {
                //宣告檔案集合用於存放檔案
                byte[] buffer = new byte[1024];
                //將檔案放入zip壓縮包
                for (int i = 0; i < fileList.size(); i++) {
                    File file 
 
= fileList.get(i);
                    try (FileInputStream fis = new FileInputStream(file)) {
                        out.putNextEntry(new ZipEntry(file.getName()));
                        int len;
                        // 讀入需要下載的檔案的內容，打包到zip檔案
                        while ((len = fis.read(buffer)) > 0
 
) {
                            out.write(buffer, 0, len);
                        }
                        out.closeEntry();
                    }
                }
            }
            //下載zip檔案
            downFile(response,wordPath, zipFileName);
        } catch (Exception e) {
            log.error("檔案下載出錯", e);
        } finally {
            // zip檔案也刪除
            List<File> fileList1 =new ArrayList<>();
            fileList1.add(new File(zipPath));
            deleteFile(fileList1);
        }
    }

    /**
     * 檔案下載
     */
    public void downFile(HttpServletResponse response,String wordPath, String zipFileName) {

        // zip檔案路徑 自己的路徑自定義哈
        String path = wordPath + File.separator + "cache" + File.separator + zipFileName;
        try {
            File file = new File(path);

            if (file.exists()) {
                try (InputStream ins = new FileInputStream(path);
                     BufferedInputStream bins = new BufferedInputStream(ins);
                     OutputStream outs = response.getOutputStream();
                     BufferedOutputStream bouts = new BufferedOutputStream(outs)) {
                    response.setContentType("application/x-download");
                    response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(zipFileName, "UTF-8"));
                    int bytesRead = 0;
                    byte[] buffer = new byte[1024];
                    while ((bytesRead = bins.read(buffer, 0, 1024)) != -1) {
                        bouts.write(buffer, 0, bytesRead);
                    }
                    bouts.flush();
                }
            }
        } catch (Exception e) {
            log.error("檔案下載出錯", e);
        }
    }

    /**
     * 刪除檔案
     */
    public void deleteFile(List<File> fileList) {
        for (File file : fileList) {
            if (file.exists()) {
                file.delete();
            }
        }
    }
}