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required library rt.jar问题的解决

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今天在eclipse中调试javamail发送附件时,出现了

FileDataSource fds=new FileDataSource("c://Setup.log");
mdp.setDataHandler(new DataHandler(fds)); //设置数据源

FileDataSource 和setDataHandler 报错 ,说需要 rt.jar 查了很帖子终于找到了解决办法

如下:

将项目的里 的jre system的 lib包去掉 ,点完确定 ,然后再将它添加回去就解决了

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