Question

com.amazonaws.services.s3.model.AmazonS3Exception: User key must be specified. (Service: Amazon S3; Status Code: 400;
       at com.amazonaws.http.AmazonHttpClient.handleErrorResponse(AmazonHttpClient.java:1160)
       at com.amazonaws.http.AmazonHttpClient.executeOneRequest(AmazonHttpClient.java:748)
       at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:467)
       at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:302)
       at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:3769)
       at com.amazonaws.services.s3.AmazonS3Client.deleteObjects(AmazonS3Client.java:1841)

代码如下所示：

client.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(keys.toArray(new String[urls.length]))

访问/密钥设置正确。

什么是用户密钥？

Answer 1

什么是用户密钥？

答案

用户密钥是用户可以获取凭据的密钥。 It verifies who you are and whether you have permission to access the resources that you are requesting。用户安全凭据包含Access Key ID和Secret Access Key。

您必须将钥匙存放在安全的位置。你的密钥不会通过AWS管理控制台提供更长时间;你将会有唯一的副本。保密，以保护您的帐户，从不发送电子邮件。即使是，也不要在组织外共享它查询似乎来自AWS或Amazon.com。没有人合法表示亚马逊会要求您提供密钥。

更多信息：http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSGettingStartedGuide/AWSCredentials.html

您的client.deleteObjects(....);方法具有使用数组处理的键。但下面使用ArrayList删除proper exception handling的对象。

删除多个对象（启用版本的存储桶）

创建AmazonS3Client类的实例。
创建DeleteObjectsRequest类的实例并提供 list of objects keys以及可选的对象版本ID 你要删除。

如果指定要删除的对象的版本ID，请Amazon S3 deletes the specific object version。如果未指定要删除的对象的版本ID，请Amazon S3 adds a delete marker。有关详细信息，请参阅Deleting One Object Per Request。
执行AmazonS3Client.deleteObjects方法。

以下Java代码示例演示了上述步骤。

List<KeyVersion> keys = new ArrayList<KeyVersion>();
// Provide a list of object keys and versions.

DeleteObjectsRequest multiObjectDeleteRequest = new DeleteObjectsRequest(bucketName)
.withKeys(keys);

try {
    DeleteObjectsResult delObjRes = s3Client.deleteObjects(multiObjectDeleteRequest);
    System.out.format("Successfully deleted all the %s items.\n", delObjRes.getDeletedObjects().size());

} catch (MultiObjectDeleteException e) {
    // Process exception.
}

对于多对象删除（非版本化存储桶），您可以使用此方法还

static void multiObjectNonVersionedDelete(List<KeyVersion> keys) {

    // Multi-object delete by specifying only keys (no version ID).
    DeleteObjectsRequest multiObjectDeleteRequest = new DeleteObjectsRequest(
            bucketName).withQuiet(false);

    // Create request that include only object key names.
    List<KeyVersion> justKeys = new ArrayList<KeyVersion>();
    for (KeyVersion key : keys) {
        justKeys.add(new KeyVersion(key.getKey()));
    }
    multiObjectDeleteRequest.setKeys(justKeys);
    // Execute DeleteObjects - Amazon S3 add delete marker for each object
    // deletion. The objects no disappear from your bucket (verify).
    DeleteObjectsResult delObjRes = null;
    try {
        delObjRes = s3Client.deleteObjects(multiObjectDeleteRequest);
        System.out.format("Successfully deleted all the %s items.\n", delObjRes.getDeletedObjects().size());
    } catch (MultiObjectDeleteException mode) {
        printDeleteResults(mode);
    }
}

有关示例的详细信息，您可以按照教程

Answer 2

如果网址比密钥长，您将提交一个长度超过密钥大小的数组，这些数据可能会导致异常（不会自己尝试）。

你可能想要：

client.deleteObjects(new DeleteObjectsRequest(bucketName)
    .withKeys(keys.toArray(new String[keys.length]))
--------------------------------------^^^^

com.amazonaws.services.s3.model.AmazonS3Exception：必须指定用户密钥

2 个答案: