eclipse报Access restriction: The type BASE64Decode

现象：

Access restriction: The type ‘BASE64Decoder’ is not API (restriction on required library ‘D:javajdk1.7.0_45jrelib t.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。