Java Code Examples for com.aliyun.oss.OSSClient#getObject()

/**
 * 创建模拟文件夹
 *
 * @param ossClient  oss连接
 * @param bucketName 存储空间
 * @param folder     模拟文件夹名如"qj_nanjing/"
 * @return 文件夹名
 */
public static String createFolder(OSSClient ossClient, String bucketName, String folder) {
    //文件夹名
    final String keySuffixWithSlash = folder;
    //判断文件夹是否存在，不存在则创建
    if (!ossClient.doesObjectExist(bucketName, keySuffixWithSlash)) {
        //创建文件夹
        ossClient.putObject(bucketName, keySuffixWithSlash, new ByteArrayInputStream(new byte[0]));
        logger.info("创建文件夹成功");
        //得到文件夹名
        OSSObject object = ossClient.getObject(bucketName, keySuffixWithSlash);
        String fileDir = object.getKey();
        return fileDir;
    }
    return keySuffixWithSlash;
}
 

@Test
public void test() throws OSSException, ClientException, IOException {
    OSSClient client = new OSSClient("oss-cn-hangzhou.aliyuncs.com", "", "", "");
    // BucketInfo info = client.getBucketInfo("edrmry");
    boolean exists = client.doesBucketExist("edrmry");
    System.out.println(exists);
    // System.out.println(client.listBuckets().size());
    // client.createBucket("dzh1");
    PutObjectResult r = client.putObject("edrmry", "dzh1.jpg", new FileInputStream("/Users/dzh/Pictures/8.pic.jpg"));
    System.out.println(r.getETag());
    OSSObject o = client.getObject("edrmry", "dzh1");
    InputStream is = o.getObjectContent();

    FileOutputStream fos = new FileOutputStream("/Users/dzh/Pictures/8.pic.2.jpg");
    int len = 0;
    byte[] buf = new byte[32];
    while ((len = is.read(buf)) != -1) {
        fos.write(buf, 0, len);
    }
    fos.flush();
    fos.close();
}
 

@Override
public void download(String objectName, String localFile) throws ApiBootObjectStorageException {
    try {
        OSSClient ossClient = getOssClient();
        ossClient.getObject(new GetObjectRequest(bucketName, objectName).withProgressListener(new OssProgressListener(objectName, apiBootObjectStorageProgress)), new File(localFile));
        closeOssClient(ossClient);
    } catch (Exception e) {
        throw new ApiBootObjectStorageException(e.getMessage(), e);
    }
}
 

/**
 * 同步 阿里云OSS 到本地
 *
 * @param path
 * @param toFile
 * @return
 */
public static boolean download(String path, File toFile) {
    boolean enable = JPressOptions.getAsBool(KEY_ENABLE);

    if (!enable || StrUtil.isBlank(path)) {
        return false;
    }

    path = removeFileSeparator(path);
    String ossBucketName = JPressOptions.get(KEY_BUCKETNAME);
    OSSClient ossClient = createOSSClient();
    try {

        if (!toFile.getParentFile().exists()) {
            toFile.getParentFile().mkdirs();
        }

        if (!toFile.exists()) {
            toFile.createNewFile();
        }
        ossClient.getObject(new GetObjectRequest(ossBucketName, path), toFile);
        return true;
    } catch (Throwable e) {
        log.error("aliyun oss download error!!!  path:" + path + "   toFile:" + toFile, e);
        if (toFile.exists()) {
            toFile.delete();
        }
        return false;
    } finally {
        ossClient.shutdown();
    }
}
 

public static void main(String[] args) throws IOException {
    /*
     * Constructs a client instance with your account for accessing OSS
     */
    OSSClient client = new OSSClient(endpoint, accessKeyId, accessKeySecret);
    
    try {
        
        /**
         * Note that there are two ways of uploading an object to your bucket, the one 
         * by specifying an input stream as content source, the other by specifying a file.
         */
        
        /*
         * Upload an object to your bucket from an input stream
         */
        System.out.println("Uploading a new object to OSS from an input stream\n");
        String content = "Thank you for using Aliyun Object Storage Service";
        client.putObject(bucketName, key, new ByteArrayInputStream(content.getBytes()));
        
        /*
         * Upload an object to your bucket from a file
         */
        System.out.println("Uploading a new object to OSS from a file\n");
        client.putObject(new PutObjectRequest(bucketName, key, createSampleFile()));
        
        /*
         * Download an object from your bucket
         */
        System.out.println("Downloading an object");
        OSSObject object = client.getObject(new GetObjectRequest(bucketName, key));
        System.out.println("Content-Type: "  + object.getObjectMetadata().getContentType());
        displayTextInputStream(object.getObjectContent());
        
    } catch (OSSException oe) {
        System.out.println("Caught an OSSException, which means your request made it to OSS, "
                + "but was rejected with an error response for some reason.");
        System.out.println("Error Message: " + oe.getErrorCode());
        System.out.println("Error Code:       " + oe.getErrorCode());
        System.out.println("Request ID:      " + oe.getRequestId());
        System.out.println("Host ID:           " + oe.getHostId());
    } catch (ClientException ce) {
        System.out.println("Caught an ClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with OSS, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ce.getMessage());
    } finally {
        /*
         * Do not forget to shut down the client finally to release all allocated resources.
         */
        client.shutdown();
    }
}