sun.misc.BASE64Encoder找不到jar包的解决方法

1. 右键项目-》属性-》java bulid path-》jre System Library-》access
   rules-》resolution选择accessible，下面填上** 点击确定即可！！！

2. 在MyEclipse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 files\java\jre6\lib\rt.jar Access restriction : The constructor BASE64Decoder() is not accessible due to restriction on required library C:\Program files\java\jre6\lib\rt.jar

解决方案1：

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。

解决方案2（亲测有用）：

Windows -> Preferences -> Java -> Compiler -> Errors/Warnings ->
Deprecated and trstricted API -> Forbidden reference (access rules):
-> change to warning