Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
1、先確定已經導入activation.jar 和 mail.jar
2、這是由於myeclipse裏自還的j2ee5.0包與javamail1.4的衝突造成的,
解決方案,刪除Java EE 5 Libraries/javaee.jar/mail裏的包有東西:
刪除以下路徑裏的mail:
C:\Users\Administrator\AppData\Local\Genuitec\Common\plugins\com.genuitec.eclipse.j2eedt.core_8.5.0.me201003231033\data\libraryset\EE_5