实现阿里云OSS进行多文件压缩下载，压缩包中不同的文件可以自定义放在不同的文件夹下，每个文件名和压缩包名也可以自定义

工具类如下：

public class OssClientUtils {
     // 都是配置信息oss
     public static final String END_POINT = "oss-cn-beijing.aliyuncs.com";
     private static final String ACCESS_KEY_ID = "sdfdsfsgg";
     private static final String ACCESS_KEY_SECRET = "sdfsfsfdsg";
     private static final OSSClient OSS_CLIENT;

    static {
        // 根据配置信息创建oss客户端对象
        OSS_CLIENT = new OSSClient(END_POINT, ACCESS_KEY_ID, ACCESS_KEY_SECRET);
    }

    /**
    * 多文件自定义多级文件夹、文件名压缩下载
    * @param zipName 压缩文件下载名，例如：压缩包名称.zip，需要带zip后缀
    * @param bucketName
    * @param list 自定义内容，name：自定义下载的文件名；filePath：文件在oss存储的全路径，第一个/需要去掉
     *             dir：压缩包中文件目录路径，可以是多级目录，以/结束，不以/开头
    * @param response
    * @return void
    */
    public static void zipDownload(String zipName, String bucketName, List<Map<String, Object>> list, HttpServletResponse response){
        // 设置强制下载不打开
        response.setContentType("application/force-download");
        ZipOutputStream zos = null;
        BufferedInputStream bis = null;
        BufferedOutputStream out = null;
        byte[] buffer = new byte[100 * 1024];
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            String key = "/food_safety/2021-01-04/135/160974729398964.ppt*图片测试.ppt,/food_safety/2021-01-04/135/160974770957682.pngx*excel测试.png,";
            if(!org.apache.commons.lang3.StringUtils.isEmpty(key)){
                // 用于将数据压缩成Zip文件格式
                zos = new ZipOutputStream(baos);
                for (int j = 0; j < list.size(); j++) {
                    Map<String, Object> map = list.get(j);
                    // 下载的自定义文件名（包含文件后缀）
                    String name = (String) map.get("name");
                    /**
                     * 文件oss的路径，去掉Bucket，不能以/开头；
                     * 例如oss文件路径为：https://yigoutest.oss-cn-beijing.aliyuncs.com/food_safety/2021-01-04/1/cpu.jpg
                     * 则map中为filePath：food_safety/2021-01-04/1/cpu.jpg
                     */
                    String filePath = (String) map.get("filePath");
                    // 下载的自定义文件夹目录
                    String dir = (String) map.get("dir");
                    //bucketName需改为自己的bucketName
                    OSSObject ossObject = OSS_CLIENT.getObject(bucketName, filePath);
                    bis = new BufferedInputStream(ossObject.getObjectContent());
                    zos.putNextEntry(new ZipEntry(dir + name));
                    int i = bis.read(buffer);
                    // 向压缩文件中输出数据
                    while(i != -1){
                        zos.write(buffer, 0, i);
                        i = bis.read(buffer);
                    }
                    zos.closeEntry();
                }
                // 设置文件名
                response.addHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(zipName , "UTF-8"));
                out=new BufferedOutputStream(response.getOutputStream());
                out.write(baos.toByteArray());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            //关闭流
            if(zos != null){
                try {
                    zos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }if(bis != null){
                try {
                    bis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(out != null){
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

调用工具类demo如下：

   /**
     * 参考：阿里云(oss)官网api地址
     * https://help.aliyun.com/product/31815.html
     */
    @RequestMapping(value = "/zipDownload")
    public void zipDownload(HttpServletResponse response){
        List<Map<String, Object>> list = new ArrayList<>();
        Map<String, Object> map1 = new HashMap<>();
        map1.put("dir", "test/");
        map1.put("name","test.jpg");
        map1.put("filePath", "food_safety/2021-01-04/1/cpu.jpg");
        list.add(map1);
        Map<String, Object> map2 = new HashMap<>();
        map2.put("dir", "test/哈哈/");
        map2.put("name","哈哈.jpg");
        map2.put("filePath", "food_safety/2021-01-04/1/cpu.jpg");
        list.add(map2);
        Map<String, Object> map3 = new HashMap<>();
        map3.put("dir", "啧啧/");
        map3.put("name","啧啧.jpg");
        map3.put("filePath", "food_safety/2021-01-04/1/cpu.jpg");
        list.add(map3);
        Map<String, Object> map4 = new HashMap<>();
        map4.put("dir", "啧啧/tt/ss/嗯嗯/");
        map4.put("name","sfsd是搭嘎第三个.jpg");
        map4.put("filePath", "food_safety/2021-01-04/1/cpu.jpg");
        list.add(map4);
        OssClientUtils.zipDownload("压缩文件下载测试.zip", gunsProperties.getOssBucket(), list, response);
    }