java.lang.UnsupportedOperationException: Method not yet implemented

apache commons-email发送邮件报错

 java.lang.UnsupportedOperationException: Method not yet implemented
        at javax.mail.internet.MimeMultipart.<init>(MimeMultipart.java:37)

        at org.apache.commons.mail.MultiPartEmail.createMimeMultipart(MultiPartEmail.java:505)

解决方案：

    mvn dependency:tree查看下目录树

   看下哪个包里面有这个 geronimo-spec-javamail-1.3.1-rc3，跟email的包冲突，

可以去掉这个包，或者exclue

<exclusions>  
            <exclusion>  
                <artifactId>geronimo-spec</artifactId>  
                <groupId>geronimo-spec-javamail</groupId>  
            </exclusion>  
 </exclusions>