javax.ws.rs.WebApplicationException: javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath

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英文:

javax.ws.rs.WebApplicationException: javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath

问题

当我调用S3Client中的listObjects方法时，它抛出以下错误。

  1. > javax.xml.bind.JAXBException: 在模块路径或类路径上未找到JAXB-API的实现。 - 带有链接的异常：
  2. > [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
  3. > javax.ws.rs.WebApplicationException: javax.xml.bind.JAXBException:
  4. > 在模块路径或类路径上未找到JAXB-API的实现。
  5. > 带有链接的异常：[java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
  6. > 	at
  7. > com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:115)
  8. > 	at
  9. > com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:634)
  10. > ...
  11. > Caused by: javax.xml.bind.JAXBException: 在模块路径或类路径上未找到JAXB-API的实现。
  12. > 带有链接的异常：[java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory] 	at
  13. > javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:232) 	at
  14. > javax.xml.bind.ContextFinder.find(ContextFinder.java:375) 	at
  15. > javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:691) 	at
  16. > javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:632) 	at
  17. > com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getStoredJAXBContext(AbstractJAXBProvider.java:196)
  18. > 	at
  19. > com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getJAXBContext(AbstractJAXBProvider.java:188)
  20. > 	at
  21. > com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:140)
  22. > 	at
  23. > com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:123)
  24. > 	at
  25. > com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:111)
  26. > 	... 96 more Caused by: java.lang.ClassNotFoundException:
  27. > com.sun.xml.bind.v2.ContextFactory 	at
  28. > org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.loadClass(TomcatEmbeddedWebappClassLoader.java:72)
  29. > 	at
  30. > org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
  31. > 	at
  32. > javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:92)
  33. > 	at
  34. > javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:125)
  35. > 	at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:230)
  36. > 	... 104 more

我尝试在build.gradle中添加jaxb，但没有帮助。

  1. 	implementation 'org.glassfish.jaxb:jaxb-runtime:2.3.0-b170127.1453'
  2. 	implementation 'javax.activation:activation:1.1'
  3. 	implementation 'javax.xml.bind:jaxb-api:2.3.0'

列出方法

  1.     public void list() {
  2.         ListObjectsResult objectListing = s3client.listObjects(nBucket);//这一行引起了错误
  4.         for (S3Object objectSummary : objectListing.getObjects()) {
  5.                 System.out.println(" - " + objectSummary.getKey() + "  " +
  6.                         "(size = " + objectSummary.getSize() + ")");
  7.         }
  9.     }

我该如何解决这个问题？或者，有没有其他列出所有键的方法？

英文:

I am using com.emc.object.s3. I am trying to list all the key in a S3 bucket, but when I call the listObjects method in S3Client, it raises the following error.

> javax.xml.bind.JAXBException: Implementation of JAXB-API has not been
> found on module path or classpath. - with linked exception:
> [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
> javax.ws.rs.WebApplicationException: javax.xml.bind.JAXBException:
> Implementation of JAXB-API has not been found on module path or
> classpath.
> with linked exception:
> [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory]
> at
> com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:115)
> at
> com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:634)
> ...
> Caused by: javax.xml.bind.JAXBException: Implementation of JAXB-API
> has not been found on module path or classpath.
> with linked exception: [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory] at
> javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:232) at
> javax.xml.bind.ContextFinder.find(ContextFinder.java:375) at
> javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:691) at
> javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:632) at
> com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getStoredJAXBContext(AbstractJAXBProvider.java:196)
> at
> com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getJAXBContext(AbstractJAXBProvider.java:188)
> at
> com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:140)
> at
> com.sun.jersey.core.provider.jaxb.AbstractJAXBProvider.getUnmarshaller(AbstractJAXBProvider.java:123)
> at
> com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:111)
> ... 96 more Caused by: java.lang.ClassNotFoundException:
> com.sun.xml.bind.v2.ContextFactory at
> org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.loadClass(TomcatEmbeddedWebappClassLoader.java:72)
> at
> org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
> at
> javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:92)
> at
> javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:125)
> at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:230)
> ... 104 more

I tried to add jaxb to build.gradle, but it doesn't help.

  1. 	implementation 'org.glassfish.jaxb:jaxb-runtime:2.3.0-b170127.1453'
  2. 	implementation 'javax.activation:activation:1.1'
  3. 	implementation 'javax.xml.bind:jaxb-api:2.3.0'

listing method

  1.     public void list() {
  2.         ListObjectsResult objectListing = s3client.listObjects(nBucket);//this line causing the error
  4.         for (S3Object objectSummary : objectListing.getObjects()) {
  5.                 System.out.println(" - " + objectSummary.getKey() + "  " +
  6.                         "(size = " + objectSummary.getSize() + ")");
  7.         }
  9.     }

How can I fix the problem? Alternatively, any other methods to list all keys?

答案1

得分: 2

使用AWS SDK for Java v2的S3Client。官方的AWS SDK for Java V2 S3Client在Spring BOOT web项目中表现出色。使用AWS Java的S3Client，您可以避免所有这些依赖问题。

  1. package com.example.s3;
  3. // snippet-start:[s3.java2.list_objects.import]
  4. import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
  5. import software.amazon.awssdk.regions.Region;
  6. import software.amazon.awssdk.services.s3.S3Client;
  7. import software.amazon.awssdk.services.s3.model.ListObjectsRequest;
  8. import software.amazon.awssdk.services.s3.model.ListObjectsResponse;
  9. import software.amazon.awssdk.services.s3.model.S3Exception;
  10. import software.amazon.awssdk.services.s3.model.S3Object;
  11. import java.util.List;
  12. // snippet-end:[s3.java2.list_objects.import]
  14. /**
  15.  * 在运行此Java V2示例代码之前，请设置好您的开发环境，包括您的凭据。
  16.  *
  17.  * 有关更多信息，请参阅以下文档主题：
  18.  *
  19.  * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
  20.  */
  22. public class ListObjects {
  24.     public static void main(String[] args) {
  26.         final String usage = "\n" +
  27.             "Usage:\n" +
  28.             "    <bucketName> \n\n" +
  29.             "Where:\n" +
  30.             "    bucketName - 从中读取对象的Amazon S3存储桶。 \n\n" ;
  32.         if (args.length != 1) {
  33.             System.out.println(usage);
  34.             System.exit(1);
  35.         }
  37.         String bucketName = args[0];
  38.         ProfileCredentialsProvider credentialsProvider = ProfileCredentialsProvider.create();
  39.         Region region = Region.US_EAST_1;
  40.         S3Client s3 = S3Client.builder()
  41.             .region(region)
  42.             .credentialsProvider(credentialsProvider)
  43.             .build();
  45.         listBucketObjects(s3, bucketName);
  46.         s3.close();
  47.     }
  49.     // snippet-start:[s3.java2.list_objects.main]
  50.     public static void listBucketObjects(S3Client s3, String bucketName ) {
  52.         try {
  53.             ListObjectsRequest listObjects = ListObjectsRequest
  54.                 .builder()
  55.                 .bucket(bucketName)
  56.                 .build();
  58.             List<S3Object> objects = s3.listObjects(listObjects).contents();
  59.             for (S3Object myValue : objects) {
  60.                 System.out.print("\n 键的名称是 " + myValue.key());
  61.                 System.out.print("\n 对象大小为 " + calKb(myValue.size()) + " KB");
  62.                 System.out.print("\n 拥有者是 " + myValue.owner());
  63.             }
  65.         } catch (S3Exception e) {
  66.             System.err.println(e.awsErrorDetails().errorMessage());
  67.             System.exit(1);
  68.         }
  69.     }
  71.     //将字节转换为千字节（KB）。
  72.     private static long calKb(Long val) {
  73.         return val / 1024;
  74.     }
  75.    // snippet-end:[s3.java2.list_objects.main]
  76. }
英文:

USe AWS SDK for Java v2 S3Client. The official AWS SDK for Java V2 S3Client works perfectly in a Spring BOOT web project. Using the AWS Java S3Client, you can avoid all of these dependency issues.

  1. package com.example.s3;
  2. // snippet-start:[s3.java2.list_objects.import]
  3. import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
  4. import software.amazon.awssdk.regions.Region;
  5. import software.amazon.awssdk.services.s3.S3Client;
  6. import software.amazon.awssdk.services.s3.model.ListObjectsRequest;
  7. import software.amazon.awssdk.services.s3.model.ListObjectsResponse;
  8. import software.amazon.awssdk.services.s3.model.S3Exception;
  9. import software.amazon.awssdk.services.s3.model.S3Object;
  10. import java.util.List;
  11. // snippet-end:[s3.java2.list_objects.import]
  12. /**
  13. * Before running this Java V2 code example, set up your development environment, including your credentials.
  14. *
  15. * For more information, see the following documentation topic:
  16. *
  17. * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
  18. */
  19. public class ListObjects {
  20. public static void main(String[] args) {
  21. final String usage = &quot;\n&quot; +
  22. &quot;Usage:\n&quot; +
  23. &quot;    &lt;bucketName&gt; \n\n&quot; +
  24. &quot;Where:\n&quot; +
  25. &quot;    bucketName - The Amazon S3 bucket from which objects are read. \n\n&quot; ;
  26. if (args.length != 1) {
  27. System.out.println(usage);
  28. System.exit(1);
  29. }
  30. String bucketName = args[0];
  31. ProfileCredentialsProvider credentialsProvider = ProfileCredentialsProvider.create();
  32. Region region = Region.US_EAST_1;
  33. S3Client s3 = S3Client.builder()
  34. .region(region)
  35. .credentialsProvider(credentialsProvider)
  36. .build();
  37. listBucketObjects(s3, bucketName);
  38. s3.close();
  39. }
  40. // snippet-start:[s3.java2.list_objects.main]
  41. public static void listBucketObjects(S3Client s3, String bucketName ) {
  42. try {
  43. ListObjectsRequest listObjects = ListObjectsRequest
  44. .builder()
  45. .bucket(bucketName)
  46. .build();
  47. ListObjectsResponse res = s3.listObjects(listObjects);
  48. List&lt;S3Object&gt; objects = res.contents();
  49. for (S3Object myValue : objects) {
  50. System.out.print(&quot;\n The name of the key is &quot; + myValue.key());
  51. System.out.print(&quot;\n The object is &quot; + calKb(myValue.size()) + &quot; KBs&quot;);
  52. System.out.print(&quot;\n The owner is &quot; + myValue.owner());
  53. }
  54. } catch (S3Exception e) {
  55. System.err.println(e.awsErrorDetails().errorMessage());
  56. System.exit(1);
  57. }
  58. }
  59. //convert bytes to kbs.
  60. private static long calKb(Long val) {
  61. return val/1024;
  62. }
  63. // snippet-end:[s3.java2.list_objects.main]
  64. }

答案2

得分: 0

更好的做法是使用官方的AWS SDK，而不是第三方API。

英文:

It’s always better to use an official AWS SDK instead of 3rd party APIs.

huangapple
  • 本文由 发表于 2023年2月6日 16:15:23
  • 转载请务必保留本文链接：https://go.coder-hub.com/75358800.html
  • amazon-web-services
  • java
  • spring
  • spring-boot
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