您肯定可以下载的的.jar 文件 - 他们要访问以便浏览器可以加载他们。我猜你是想获得的.class 文件，但它是一个在的.jar ，所以得到在的.jar 代替。

You certainly can download the the .jar file - they have to be accessible so that browsers can load them. I'd guess you are trying to get the .class file, but it is within a .jar, so get the .jar instead.