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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。

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