仅使用 JDK6 进行 Base64 解码
这个关于JDK 5的问题说，没有提供实现JDK 5，但 JDK 6 应该有一个 sun.misc.Base64Decoder.
This question with regard to JDK 5 says, there is no implementation provided with JDK 5, but JDK 6 is supposed to have a sun.misc.Base64Decoder.
据我所知，JDK 没有提供此类，我无法在其中找到任何其他类似的类
那么，JDK6 的情况如何?
我知道那里有很多实现，比如 Commons 和 JBoss 的，但是我们有一个限制性的 3rd 方库政策，所以我试图避免重新发明轮子.
As far as I can tell though, this class is not provided with the JDK and I was not able to find any other similar classes in it
So, what is the situation like with JDK6?
I am aware of numerous implementations out there like the Commons and the JBoss ones, but we have a restrictive 3rd party lib policy, so I am trying to avoid reinventing the wheel.
推荐答案
不，Java 5 和 Java 6 之间的情况没有改变.
No, the situation didn't change between Java 5 and Java 6.
不幸的是，Java SE 平台中没有正式的 Base64 实现. @bestsss 表明，在 Java SE 中实际上有一个(隐藏良好的)Base64 实现6(有关详细信息，请参阅他的答案).
Unfortunately there is no official Base64 implementation in the Java SE platform. @bestsss has shown that there is in fact a (well-hidden) Base64 implementation in Java SE 6 (see his answer for more detail).
Sun JDK 附带这个类 (sun.misc.Base64Decoder)，但没有指定它，不应使用(尤其是因为它不需要存在于其他实现甚至版本中).
The Sun JDK ships with this class (sun.misc.Base64Decoder), but it's not specified and should not be used (especially as it's not required to exist in other implementations or even versions).
如果您绝对需要避免使用第三方库(Apache Commons Codec 将是传统的Base64 实现),那么您可能希望将 BSD(或类似)许可版本复制到您的项目中.有一个 公共域实现，当它出现时，它几乎是无痛的到许可证.
If you absolutely need to avoid third party libraries (Apache Commons Codec would be the traditional provider of a Base64 implementation), then you might want to copy a BSD (or similarly) licensed version into your project. There is a public domain implementation and that's about as painless as it gets, when it comes to licenses.
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