Access restriction: The type ‘BASE64Decoder‘ is not API (restriction on required library ‘C:\Program Files\Java\jdk1.7.0\jre\lib\rt.jar‘)
http://blog.csdn.net/jbxiaozi/article/details/7351768
Access restriction: The type 'BASE64Decoder' is not API
原文：http://www.cnblogs.com/rgqancy/p/7878532.html