javac SendEmail.java -cp ".;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javax.mail.jar"
成功制作 SendEmail.class
java SendEmail -cp ".;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javax.mail.jar"
结果是:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: javax/mail/Address
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.mail.Address
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
我尝试将 javax.mail.jar 放在 jdk1.8.0_111/jre/lib 和 jre1.8.0_111\lib 目录中。我尝试将它放在与 SendEmail.java 文件相同的目录中。我已经阅读了文档并观看了教程。为什么这仍然发生?我正在使用 1.5.6 版的 jar。