Access restriction: The type ‘BASE64Decoder’ is not API (restriction on required library ‘D:\java\jd

由于代码中使用了BASE64Encoder 


 

更新之后报如下错误： 
Access restriction: The type ‘BASE64Decoder’ is not API (restriction on required library ‘D:\java\jdk1.7.0_45\jre\lib\rt.jar’)

解决其实很简单，把JRE System Library移除重新添加即可。 

方法：项目右键–>Properties–>Java Build Path，切换到libraries tab页，找到JRE System Library移除， 然后再点击Add Library–>JRE System Library添加即可。