java string base64 encoded
Question
I need a way to know if a string is Base64 encoded... any idea ?
thanks
2 answers
solution1
4 ACCPTED 2010-10-22 07:46:36
字符串长度必须是4的倍数，并且仅允许以下字符AZ，az，0-9 * + ，* /和=作为填充字符（仅在末尾）
solution2
4 2010-10-22 07:49:29
IMHO you need to try to decode it, and if it fails - it is not encoded.
There are many Base64 decoders for Java, here are some:
sun.misc.BASE64Decoder
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