解决项目报错出现Access restriction: The type BASE64Encoder is not accessible due to restriction

项目报错出现：Access restriction: The type BASE64Encoder is not accessible due to restriction on required library E:\MyEclipse 2014\MyEclipse2014\binary\com.sun.java.jdk7.win32.x86_64_1.7.0.u45\jre\lib\rt.ja

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