本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 描述憑證
<a name="sdk-describe"></a>

以下範例說明如何使用 [DescribeCertificate](https://docs.aws.amazon.com/acm/latest/APIReference/API_DescribeCertificate.html) 函數。

```
package com.amazonaws.samples;

import com.amazonaws.services.certificatemanager.AWSCertificateManagerClientBuilder;
import com.amazonaws.services.certificatemanager.AWSCertificateManager;
import com.amazonaws.services.certificatemanager.model.DescribeCertificateRequest;
import com.amazonaws.services.certificatemanager.model.DescribeCertificateResult;

import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.regions.Regions;

import com.amazonaws.services.certificatemanager.model.InvalidArnException;
import com.amazonaws.services.certificatemanager.model.ResourceNotFoundException;
import com.amazonaws.AmazonClientException;

/**
 * This sample demonstrates how to use the DescribeCertificate function in the AWS Certificate
 * Manager service.
 *
 * Input parameter:
 *   CertificateArn - The ARN of the certificate to be described.
 *
 * Output parameter:
 *   Certificate information
 *
 */

public class AWSCertificateManagerExample {

   public static void main(String[] args) throws Exception{

      // Retrieve your credentials from the C:\Users\name\.aws\credentials file in Windows
      // or the ~/.aws/credentials file in Linux.
      AWSCredentials credentials = null;
      try {
          credentials = new ProfileCredentialsProvider().getCredentials();
      }
      catch (Exception ex) {
          throw new AmazonClientException("Cannot load the credentials from file.", ex);
      }

      // Create a client.
      AWSCertificateManager client = AWSCertificateManagerClientBuilder.standard()
              .withRegion(Regions.US_EAST_1)
              .withCredentials(new AWSStaticCredentialsProvider(credentials))
              .build();

      // Create a request object and set the ARN of the certificate to be described.
      DescribeCertificateRequest req = new DescribeCertificateRequest();
      req.setCertificateArn("arn:aws:acm:region:account:certificate/12345678-1234-1234-1234-123456789012");

      DescribeCertificateResult result = null;
      try{
         result = client.describeCertificate(req);
      }
      catch (InvalidArnException ex)
      {
         throw ex;
      }
      catch (ResourceNotFoundException ex)
      {
         throw ex;
      }

      // Display the certificate information.
      System.out.println(result);

   }
}
```

如果成功，上述範例會顯示類似以下內容的資訊。

```
{
    Certificate: {
        CertificateArn: arn:aws:acm:region:account:certificate/12345678-1234-1234-1234-123456789012,
        DomainName: www.example.com,
        SubjectAlternativeNames: [www.example.com],
        DomainValidationOptions: [{
            DomainName: www.example.com,
        }],
        Serial: 10: 0a,
        Subject: C=US,
        ST=WA,
        L=Seattle,
        O=ExampleCompany,
        OU=sales,
        CN=www.example.com,
        Issuer: ExampleCompany,
        ImportedAt: FriOct0608: 17: 39PDT2017,
        Status: ISSUED,
        NotBefore: ThuOct0510: 14: 32PDT2017,
        NotAfter: SunOct0310: 14: 32PDT2027,
        KeyAlgorithm: RSA-2048,
        SignatureAlgorithm: SHA256WITHRSA,
        InUseBy: [],
        Type: IMPORTED,
    }
}
```