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新浪微博id的62进制转换 - 爱码网

新浪微博id的62进制转换

某条微博链接

某条微博的链接如下，同样省略了后面的无关参数

http://weibo.com/2803301701/CeaOU15IT

CeaOU15IT为这条微博的mid，与之相对应的还有一个id，id是一条微博的唯一标识，由于id比较长，为了缩短url对id进行了转换变成了mid。CeaOU15IT对应的id为3833781880260331
那么问题来了，这个id如何计算呢？是一个62进制的转换!