java加密用到了BASE64Decoder时报错信息:Access restriction: The type BASE64Encoder is not accessible due to restrict

在Eclipse中编写Java代码时，用到了BASE64Decoder，import sun.misc.BASE64Decoder;可是Eclipse提示： 
Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:Program 
filesjavajre6lib t.jar 

最后在http://forums.dzone.com/eclipse/384-access-restriction- problems.html找到答案，只需要在project build path中先移除JRE System Library，再添加库JRE System Library，重新编译后就一切正常了

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原文地址：https://www.cnblogs.com/lwlxqlccc/p/8603342.html