本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# 续订证书
<a name="sdk-renew"></a>

以下示例演示了如何使用 [RenewCertificate](https://docs.aws.amazon.com/acm/latest/APIReference/API_RenewCertificate.html) 函数。该函数续订由私有证书颁发机构 (CA) 颁发并随[ExportCertificate](https://docs.aws.amazon.com/acm/latest/APIReference/API_ExportCertificate.html)函数导出的私有证书。此时，使用此函数仅可续订导出的私有证书。要使用 ACM 续订 AWS 私有 CA 证书，必须先向 ACM 服务主体授予执行此操作的权限。有关更多信息，请参阅[将证书续订权限分配给 ACM](https://docs.aws.amazon.com/privateca/latest/userguide/assign-permissions.html#PcaPermissions)。

```
package com.amazonaws.samples;

import com.amazonaws.AmazonClientException;

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.AWSCertificateManagerClientBuilder;
import com.amazonaws.services.certificatemanager.AWSCertificateManager;

import com.amazonaws.services.certificatemanager.model.RenewCertificateRequest;
import com.amazonaws.services.certificatemanager.model.RenewCertificateResult;


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

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class RenewCertificate {

   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 in Linux.
      AWSCredentials credentials = null;
      try {
          credentials = new ProfileCredentialsProvider().getCredentials();
      }
      catch (Exception ex) {
          throw new AmazonClientException("Cannot load your credentials from file.", ex);
      }

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


      // Create a request object and specify the ARN of the certificate to renew.
      RenewCertificateRequest req = new RenewCertificateRequest();
      req.withCertificateArn("arn:aws:acm:{{region}}:{{account}}:"
            +"certificate/M{{12345678-1234-1234-1234-123456789012}}");


      // Renew the certificate.
      RenewCertificateResult result = null;
      try {
         result = client.renewCertificate(req);
      }
      catch(InvalidArnException ex)
      {
         throw ex;
      }
      catch (ResourceNotFoundException ex)
      {
         throw ex;
      }
      catch (ValidationException ex)
      {
         throw ex;
      }

      // Display the result.
     System.out.println(result);
   }
}
```