java.lang.NoClassDefFoundError : Java 메일 용 JUnit 테스트 케이스의 경우 com / sun / mail / util / MailLogger

java.lang.NoClassDefFoundError : Java 메일 용 JUnit 테스트 케이스의 경우 com / sun / mail / util / MailLogger

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Java Mail API를 사용하여 이메일을 읽고 구문 분석합니다. 서블릿 코드에서 제대로 작동합니다.

이제 같은 목적으로 JUnit 테스트 사례를 작성하려고합니다. 그러나 온라인 Session session = Session.getDefaultInstance(properties);에서 다음 예외가 발생합니다.

java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger
    at javax.mail.Session.initLogger(Session.java:227)
    at javax.mail.Session.<init>(Session.java:212)
    at javax.mail.Session.getDefaultInstance(Session.java:315)
    at javax.mail.Session.getDefaultInstance(Session.java:355)
    at com.vxl.appanalytix.dataload.fromEmail.EmailParser.parseEmailSubject(EmailParser.java:44)
    at com.vxl.appanalytix.controllers.controllerClasses.GenericEmailServiceClass.readEmailAttachments(GenericEmailServiceClass.java:33)
    at com.vxl.appanalytix.dataload.GenericEmailTestCase.test(GenericEmailTestCase.java:42)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: com.sun.mail.util.MailLogger
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 35 more

누구든지 내가 잘못 가고 있다고 말할 수 있습니까?

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com.sun.mail.util.MailLoggerJavaMail API의 일부입니다 . EE 환경 (라이브 서버에서 사용할 수있는 이유)에 이미 포함되어 있지만 SE 환경에는 포함되어 있지 않습니다.

오라클 문서 :

JavaMail API는 Java SE 플랫폼과 함께 사용하기위한 선택적 패키지로 제공되며 Java EE 플랫폼에도 포함되어 있습니다.

99% that you run your tests in SE environment which means what you have to bother about adding it manually to your classpath when running tests.

If you're using maven add the following dependency (you might want to change version):

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.6.0</version>
</dependency>

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The javax.mail-api artifact is only good for compiling against. You actually need to run code, so you need a complete implementation of JavaMail. Use:

<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.5</version>

The version number will probably differ: https://mvnrepository.com/artifact/com.sun.mail/javax.mail

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I use the following maven dependencies to get java mail working. The first one includes the javax.mail API (with no implementation) and the second one is the SUN implementation of the javax.mail API.

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>javax.mail-api</artifactId>
    <version>1.5.5</version>
</dependency>
<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.5.5</version>
</dependency>

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Download this JAR and add it to your libraries: http://java.net/projects/javamail/downloads/download/javax.mail.jar

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Please see http://mvnrepository.com/artifact/javax.mail/mail/, you can download jar or use the maven dependency, depending on your project type. That should pretty much cover it and you won't get a NoClassDefFoundError exception.

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It happens also if your code is expecting Java Mail 1.4 and your jars are Java Mail 1.3. Happened to me when upgraded Pentaho Kettle

Regards

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Really it's interesting. You need just use javax-mail.jar of "com.sun" not "javax.mail".
dwonload com.sun mail jar

참고URL : https://stackoverflow.com/questions/16807758/java-lang-noclassdeffounderror-com-sun-mail-util-maillogger-for-junit-test-case