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# IssueCertificate
<a name="JavaApi-IssueCertificate"></a>

Il seguente esempio di Java mostra come utilizzare l'[IssueCertificate](https://docs.aws.amazon.com/privateca/latest/APIReference/API_IssueCertificate.html)operazione.

Questa operazione utilizza l'autorità di certificazione (CA) privata per emettere un certificato di entità finale. Questa operazione restituisce l'Amazon Resource Name (ARN) del certificato. È possibile recuperare il certificato chiamando [GetCertificate](https://docs.aws.amazon.com/privateca/latest/APIReference/API_GetCertificate.html)e specificando l'ARN.

**Nota**  
L'[IssueCertificate](https://docs.aws.amazon.com/privateca/latest/APIReference/API_IssueCertificate.html)operazione richiede di specificare un modello di certificato. Questo esempio utilizza il `EndEntityCertificate/V1` modello. Per informazioni su tutti i modelli disponibili, vedere[Utilizza modelli di certificato AWS Private CA](UsingTemplates.md).

```
package com.amazonaws.samples;

import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.client.builder.AwsClientBuilder;
import com.amazonaws.client.builder.AwsClientBuilder.EndpointConfiguration;
import com.amazonaws.auth.AWSStaticCredentialsProvider;

import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Objects;

import com.amazonaws.services.acmpca.AWSACMPCA;
import com.amazonaws.services.acmpca.AWSACMPCAClientBuilder;

import com.amazonaws.services.acmpca.model.IssueCertificateRequest;
import com.amazonaws.services.acmpca.model.IssueCertificateResult;
import com.amazonaws.services.acmpca.model.SigningAlgorithm;
import com.amazonaws.services.acmpca.model.Validity;

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.acmpca.model.LimitExceededException;
import com.amazonaws.services.acmpca.model.ResourceNotFoundException;
import com.amazonaws.services.acmpca.model.InvalidStateException;
import com.amazonaws.services.acmpca.model.InvalidArnException;
import com.amazonaws.services.acmpca.model.InvalidArgsException;
import com.amazonaws.services.acmpca.model.MalformedCSRException;

public class IssueCertificate {
   public static ByteBuffer stringToByteBuffer(final String string) {
      if (Objects.isNull(string)) {
          return null;
      }
      byte[] bytes = string.getBytes(StandardCharsets.UTF_8);
      return ByteBuffer.wrap(bytes);
      }

   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("default").getCredentials();
      } catch (Exception e) {
          throw new AmazonClientException("Cannot load your credentials from disk", e);
      }

      // Define the endpoint for your sample.
      String endpointRegion = "{{region}}";  // Substitute your region here, e.g. "us-west-2"
      String endpointProtocol = "https://acm-pca." + endpointRegion + ".amazonaws.com/";
      EndpointConfiguration endpoint =
          new AwsClientBuilder.EndpointConfiguration(endpointProtocol, endpointRegion);

      // Create a client that you can use to make requests.
      AWSACMPCA client = AWSACMPCAClientBuilder.standard()
          .withEndpointConfiguration(endpoint)
          .withCredentials(new AWSStaticCredentialsProvider(credentials))
          .build();

      // Create a certificate request:
      IssueCertificateRequest req = new IssueCertificateRequest();

      // Set the CA ARN.
      req.withCertificateAuthorityArn("arn:{{aws}}:acm-pca:{{us-east-1}}:{{111122223333}}:certificate-authority/{{11223344-1234-1122-2233-112233445566}}");

      // Specify the certificate signing request (CSR) for the certificate to be signed and issued.
      String strCSR =
      "{{-----BEGIN CERTIFICATE REQUEST-----\n}}" +
      "{{base64-encoded certificate\n}}" +
      "{{-----END CERTIFICATE REQUEST-----\n}}";
      ByteBuffer csrByteBuffer = stringToByteBuffer(strCSR);
      req.setCsr(csrByteBuffer);

      // Specify the template for the issued certificate.
      req.withTemplateArn("arn:aws:acm-pca:::template/{{EndEntityCertificate/V1}}");

      // Set the signing algorithm.
      req.withSigningAlgorithm(SigningAlgorithm.SHA256WITHRSA);

      // Set the validity period for the certificate to be issued.
      Validity validity = new Validity();
      validity.withValue(<<3650L>>);
      validity.withType("DAYS");
      req.withValidity(validity);

      // Set the idempotency token.
      req.setIdempotencyToken("1234");

      // Issue the certificate.
      IssueCertificateResult result = null;
      try {
         result = client.issueCertificate(req);
      } catch (LimitExceededException ex) {
         throw ex;
      } catch (ResourceNotFoundException ex) {
         throw ex;
      } catch (InvalidStateException ex) {
         throw ex;
      } catch (InvalidArnException ex) {
         throw ex;
      } catch (InvalidArgsException ex) {
         throw ex;
      } catch (MalformedCSRException ex) {
         throw ex;
      }

      // Retrieve and display the certificate ARN.
      String arn = result.getCertificateArn();
      System.out.println(arn);
   }
}
```

L'output visualizzato dovrebbe essere simile al seguente:

```
arn:aws:acm-pca:{{region}}:{{account}}:certificate-authority/{{CA_ID}}/certificate/{{certificate_ID}}
```