Error running JUnit unit test after project add MAVEN support

After the project adds MAVEN support, run the JUnit unit test and an error occurs:

ERROR in Ch.qos.logback.core.joran.action.appenderaction-could not create a appender of type [COM.TRAVELSKY.TDP.P KgStock.integration.logback.appender.mail.SMTPAppender]. Ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type Com.travelsky.tdp.pkgStock.integration.logback.appender.mail.SMTPAppender at CH 

. qos.logback.core.util.DynamicClassLoadingException:Failed to instantiate type Com.travelsky.tdp.pkgStock.integration.logback.appender.mail.SMTPAppender at Ch.qos.logback.core.util.OptionHelper.instantiateByClassName (optionhelper.java:54) at ... (omitting printing information) at at Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main (remotetestrunner.java:197) caused by : Java.lang.ClassFormatError:Absent Code in method, not native, or abstract in class file Javax/mail/in Ternet/addressexception at the Java.lang.ClassLoader.defineClass1 (Native method) at ..... (omitting print information) at ... 41Common frames omitted ERROR in Ch.qos.logback.core.joran.spi.interpreter@192:115-actionexception into Action for Tag [Appender] Ch.qos.logback.core.joran.spi.ActionException:ch.qos.logback.core.util.DynamicClassLoadingExce ption:failed to instantiate type Com.travelsky.tdp.pkgStock.integration.logback.appender.mail.SMTPAppender at Ch. Qos.logback.core.joran.spi.ActionException:ch.qos.logback.core.util.DynamicClassLoadingException:Failed to Instantiate type Com.travelsky.tdp.pkgStock.integration.logback.appender.mail.SMTPAppender at at CH.QOS.L Ogback.core.joran.action.AppenderAction.begin (appenderaction.java:82) at ... (omitting printing information) at at Org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main (remotetestrunner.java:197) caused by : ch.qos.logback.core.util.DynamicClassLoadingException:Failed to instantiate type Com.travelsky.tdp.pkgStock.integration.logback.appender.mail.SMTPAppender at Ch.qos.logback.core.Util. Optionhelper.instantiatebyclassname (optionhelper.java:54) at ... Common frames omitted caused by:java.lang.ClassFormatError:Absent Code in method and not native or Abstract in class file <span style= "color: #ff0000;" ><strong>javax/mail/internet/<span style= "color: #ff0000;" >Ad</span>dressException</strong></span> at Java.lang.ClassLoader.defineClass1 (Native Meth OD) at ..... (omitting print information) at ... Common frames omitted

Unit test failed to find the cause and found the following problem:

1, Maven rely on the use of Javeee.jar version is high, which contains mail-related interfaces, and Mail.jar conflict;

2, Javaee.jar contains the mail-related interface implementation class;

3, MyEclipse Javaee.jar version and the version of MyEclipse itself: MyEclipse6.5 with the Javaee.jar does not contain mail-related interfaces, The MyEclipse8.0 Javaee.jar contains the mail-related interface, and also contains the implementation of the interface.

4, the project directly used in the Mail.jar class and method;

This bug occurs because of class conflicts, so remove conflicting classes; But how do you choose?

The analysis is as follows:

A, this project is a Web project, so Javaee.jar should be retained;

B, Javaee.jar contains the implementation of mail-related interfaces, so javaee.jar should be retained;

C, the project directly used in the Mail.jar interface, so the Mail.jar should be retained;

So he got into a dilemma.

However, there is a rather humble way, maven dependencies do not add Java EE dependencies, using MyEclipse javeee dependencies, and if the dependency contains mail-related interfaces, delete them, so the problem is resolved.

However, some people will ask, if I changed the version of MyEclipse, not to be modified every time, if forgotten, it is a waste of time ... So the solution is only temporary, and the more orthodox solution is the following:

Place the dependencies of <scope>provided</scope> in Pom.xml on the back of other dependencies without deleting any dependencies.

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