java中字节流设置与文件前缀

Question

我想用表单上传 一个对象到华为桶，他们给的是一个字节流上传吧？ 这个tobyte怎么赋值呢？谢谢

还有下面这个prfix怎么赋值呢？这是一个拼接对象名的。
前端就是一个input标签上传文件和名字等

它这个是要读取本地文件，上传 到华为云服务器的

Answer 1

    private static String endPoint = "obs.cn-east-2.myhuaweicloud.com";
    private static String ak = "FSJCCCERT3S5H2";
    private static String sk = "7XCtFL7A6ssd344r3oHDtPXtXCvgoHxLiM4lD";
    private static String bucketname="ert-fge-daily-public";
    private static  ObsClient obsClient = new ObsClient(ak, sk, endPoint);

    public static String  uploadToObs( InputStream inputStream,String objectname) throws IOException {
        PutObjectRequest request = new PutObjectRequest(bucketname, objectname,inputStream);
        request.setProgressListener(new ProgressListener() {
            @Override
            public void progressChanged(ProgressStatus status) {
                // 获取上传平均速率
                System.out.println("AverageSpeed:" + status.getAverageSpeed());
                // 获取上传进度百分比
                System.out.println("TransferPercentage:" + status.getTransferPercentage());
            }
        });
        // 每上传1MB数据反馈上传进度
        request.setProgressInterval(1024 * 1024L);
        obsClient.putObject(request);
        return "https://"+bucketname+"."+endPoint+"/"+objectname;
    }

    public static void listObjects(){
        ListObjectsRequest request = new ListObjectsRequest(bucketname);
        // 设置每页100个对象
        request.setMaxKeys(100);
        ObjectListing result;
        do{
            result = obsClient.listObjects(request);
            for(ObsObject obsObject : result.getObjects()){
                System.out.println("\t" + obsObject.getObjectKey());
                System.out.println("\t" + obsObject.getOwner());
            }
            request.setMarker(result.getNextMarker());
        }while(result.isTruncated());
    }

    public static void deleteObject(String objectname){
        ObsClient obsClient = new ObsClient(ak, sk, endPoint);
        obsClient.deleteObject(bucketname, objectname);
    }

    public static boolean deleteObject2(String objectname){
        try {
            DeleteObjectsRequest deleteRequest = new DeleteObjectsRequest(bucketname);
            deleteRequest.addKeyAndVersion(objectname);
            DeleteObjectsResult deleteResult = obsClient.deleteObjects(deleteRequest);
            List<DeleteObjectsResult.DeleteObjectResult> list = deleteResult.getDeletedObjectResults();
            return list.size()>0&& objectname.equals(list.get(0).getObjectKey());
        }catch (Exception e){
        }
        return false;
    }

    /**
     * 列举桶
     */
    public static void listBucketst(){
        ListBucketsRequest request = new ListBucketsRequest();
        request.setQueryLocation(true);
        List<ObsBucket> buckets = obsClient.listBuckets(request);
        for(ObsBucket bucket : buckets){
            System.out.println("BucketName:" + bucket.getBucketName());
            System.out.println("CreationDate:" + DateUtils.formatDate(bucket.getCreationDate(),"yyyy-MM-dd HH:mm:ss"));
            System.out.println("Location:" + bucket.getLocation());
        }
    }