Access restriction: The type 'BASE64Encoder' is not API (restriction on required library 'D:\Java\jdk1.6.0_43\jre\lib\rt.jar') eclipse引入import sun.misc.BASE64Encoder; 是红叉,怎么解决? 工具/原料 eclipse 方法/步骤 右键项目,点属性(Properties): java bulid path-->Libraries-->…