Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart)

在接觸WebService時值得收藏的一篇文章：

在調試Axis1.4訪問WebService服務時，出現以下錯誤：

Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart)

有錯誤找到錯誤原因以及發現值得收藏的一篇文章，方便自己查找。

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錯誤原因：
需要mail.jar和activation.jar。

Solution:
Web Services Required Jars Download Instructions?
http://www.eclipse.org/webtools/wst/components/ws/download_instructions_for_jars.html

解決辦法：
1)?下載javamail和jaf，解壓出mail.jar和activation.jar
http://java.sun.com/products/javamail/downloads/index.html
http://java.sun.com/products/javabeans/glasgow/jaf.html#download
或者我提供了一個rar包：包含mail.jar action.jar
download：mail.jar and activation.jar
2)?把mail.jar和activation.jar放到%AXIS_HOME%/WEB-INF/lib目錄下

3)?將.jar文件添加到%CLASSPATH%

說明：
這個是可以忽略的。不過以后構建web services都要用到的，還是添加上的好。
參考：http://www.ogsadai.org.uk/documentation/ogsadai-wsi-2.1/doc/wsi/FAQ.html
This is a warning message that can safely be ignored. It is displayed when Axis has been deployed without an optional JAR. An optional JAR is one that allows Axis to support a particular piece of functionalty but is not required for general use. Please refer to the Axis documentation for more details.

備注：
一篇很好的jars下載指南：Web Services Required Jars Download Instructions
Axis指南：Guide to building Axis