问题描述如下:

Source not found The JAR file …has no source attachment.

解决方案:

选中你的项目方案,然后鼠标右键选择属性Properties,如下图:

Source not found The JAR file …has no source attachment.

然后依次按下图操作就完成了。Source not found The JAR file …has no source attachment.

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