小编Sum*_*pra的帖子

我得到下面提到的错误。我将mail.jar，activation.jar，mailapi.jar，common-lang3.jar复制到了/ usr / lib / jvm / java-8-openjdk-amd64 / jre / lib / ext

java.lang.NoClassDefFoundError: javax/activation/DataHandler
    at org.apache.commons.mail.Email.createMimeMessage(Email.java:1832)
    at org.apache.commons.mail.Email.buildMimeMessage(Email.java:1268)
    at org.apache.commons.mail.Email.send(Email.java:1436)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at RJavaTools.invokeMethod(RJavaTools.java:386)
Caused by: java.lang.ClassNotFoundException
    at RJavaClassLoader.findClass(RJavaClassLoader.java:383)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:566)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
    ... 8 more
NULL
Error: NoClassDefFoundError (Java): javax/activation/DataHandler