java 无法检索亚马逊凭证
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Can't retrieve Amazon Credentials
提问by Tometoyou
I am trying to provide credentials for my Spring boot maven application hosted on the cloud (Pivotal Web Services) to be able to upload to Amazon S3. However, every time I try to get the credentials using:
我正在尝试为托管在云（Pivotal Web Services）上的 Spring boot maven 应用程序提供凭证，以便能够上传到 Amazon S3。但是，每次我尝试使用以下方法获取凭据时：
DefaultAWSCredentialsProviderChain credentialProviderChain = new DefaultAWSCredentialsProviderChain();
TransferManager transferManager = new TransferManager(credentialProviderChain.getCredentials());
It says
它说
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception
[Request processing failed; nested exception is com.amazonaws.AmazonClientException: Unable
to load AWS credentials from any provider in the chain] with root cause
2016-01-28T23:55:38.55+0000 [APP/0] OUT com.amazonaws.AmazonClientException:
Unable to load AWS credentials from any provider in the chain
I'm a bit confused as to whether my credentials should be defined in a beans.xml or application.properties file. But I have tried both to no avail. Could someone point me in the right direction?
对于我的凭据是否应该在 beans.xml 或 application.properties 文件中定义，我有点困惑。但是我两个都试过都无济于事。有人能指出我正确的方向吗？
回答by Stephen Rosenthal
Check out the docs! http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/auth/DefaultAWSCredentialsProviderChain.html
AWS credentials provider chain that looks for credentials in this order:
按以下顺序查找凭证的 AWS 凭证提供程序链：
- Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY (RECOMMENDED since they are recognized by all the AWS SDKs and CLI except for .NET), or AWS_ACCESS_KEY and AWS_SECRET_KEY (only recognized by Java SDK)
- Java System Properties - aws.accessKeyId and aws.secretKey
- Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI
- Instance profile credentials delivered through the Amazon EC2 metadata service
- 环境变量 - AWS_ACCESS_KEY_ID 和 AWS_SECRET_ACCESS_KEY（推荐，因为它们被除 .NET 之外的所有 AWS 开发工具包和 CLI 识别），或 AWS_ACCESS_KEY 和 AWS_SECRET_KEY（仅被 Java 开发工具包识别）
- Java 系统属性 - aws.accessKeyId 和 aws.secretKey
- 默认位置 (~/.aws/credentials) 中的凭证配置文件由所有 AWS 开发工具包和 AWS CLI 共享
- 通过 Amazon EC2 元数据服务交付的实例配置文件凭证
More general docs here: http://docs.aws.amazon.com/AWSSdkDocsJava/latest/DeveloperGuide/credentials.html
更一般的文档在这里：http: //docs.aws.amazon.com/AWSSdkDocsJava/latest/DeveloperGuide/credentials.html
回答by Raj Hassani
this approach worked:
这种方法有效：
$ export AWS_ACCESS_KEY_ID=...
$ export AWS_SECRET_ACCESS_KEY=...
