Java 使用Amazon AWS SDK时遇到NoClassDefFoundError
目前,在我的测试Java 使用Amazon AWS SDK时遇到NoClassDefFoundError,java,jsf-2,amazon-web-services,noclassdeffounderror,Java,Jsf 2,Amazon Web Services,Noclassdeffounderror,目前,在我的测试EJB项目中,我有以下无状态bean: @WebService(serviceName = "TestService") @Stateless() public class TestService { @WebMethod(operationName = "testUpload") public void testUpload() { // DUMMY LINE Log log = LogFactory.getLog(Amazon
EJB项目中
,我有以下无状态
bean:
@WebService(serviceName = "TestService")
@Stateless()
public class TestService {
@WebMethod(operationName = "testUpload")
public void testUpload() {
// DUMMY LINE
Log log = LogFactory.getLog(AmazonS3Client.class);
// END DUMMY LINE
File file = new File("path_to_test_file");
AWSCredentials credentials = new BasicAWSCredentials(AMAZON_KEY_ID, AMAZON_SECRET_KEY);
AmazonS3 conn = new AmazonS3Client(credentials);
conn.setEndpoint("https://s3-ap-southeast-1.amazonaws.com");
PutObjectRequest por = new PutObjectRequest(AMAZON_BUCKET_NAME, "test.txt", file);
conn.putObject(por);
}
}
在我的测试WAR项目中
,我有以下ManagedBean
:
@Named(value = "mrBean")
@RequestScoped
public class MrBean {
@WebServiceRef(wsdlLocation = "WEB-INF/wsdl/localhost_8080/TestService/TestService.wsdl")
private TestService_Service service;
private TestService port;
@PostConstruct
public void test() {
port = service.getTestServicePort();
port.testUpload();
}
}
当我部署我的EJB项目
并运行test.xhtml
页面时,我总是在以下行遇到错误:
AmazonS3 conn = new AmazonS3Client(credentials);
开始时,错误如下所示:
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at com.amazonaws.services.s3.AmazonS3Client.<clinit>(AmazonS3Client.java:193)
...
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
有一些奇怪的事情:
testUpload()
函数并粘贴到ManagedBean
,函数工作得非常好。我100%确信我已经导入了这两个项目中的所有库。但是,函数testUpload()
只能在WAR项目中工作,而不能在EJB项目中工作
loglog=LogFactory.getLog(AmazonS3Client.class)代码>但从未在该行抛出错误
如果您能告诉我如何解决这个问题,我将不胜感激:(.为了解决这个问题,我必须将
EJB项目
打包到EAR项目
中。只有当我部署EAR项目
而不是直接部署EJB项目
时,库才能正确加载
我还没有找到这个问题的原因。如果可能的话,如果有人能给我一个解释,我将不胜感激:)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.amazonaws.services.s3.AmazonS3Client