eclipse報錯Access restriction: The type 'BASE64Encoder' is not API處理方案

如下錯誤： Access restriction: The type ‘BASE64Decoder’ is not API (restriction on required library ‘D:\java\jdk1.7.0_45\jre\lib\rt.jar’) 解決其實很簡單，把JRE System Library移除重新添加即可。 方法：項目右鍵–>Properties–>Java Buil

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