public final class Base64 extends Object
Copyright: Ma Bingyao[andot@ujn.edu.cn] Version: 3.0.2 LastModified: Apr 12, 2010 This library is free. You can redistribute it and/or modify it under GPL. 完整的base64定义可见 RFC1421和 RFC2045。编码后的数据比原始数据略长,为原来的4/3。
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