[英]Encode String (rfc4122) to Number in Java, decode in PHP
In my use case, a javascript tracker generate a unique ID for a visitor whenever he/she visits the site, using the following formula : 在我的用例中,每当访问者访问站点时,javascript跟踪器都会使用以下公式为访问者生成唯一的ID:
function generateUUID(){
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
return v.toString(16);
});
}
It generates strings like this (rfc4122): 它生成这样的字符串(rfc4122):
"3314891e-285e-40a7-ac59-8b232863bead"
Now I need to encode that string in a Number (eg BigInteger in Java) that can be read by Mahout. 现在,我需要将该字符串编码为Mahout可以读取的Number(例如Java中的BigInteger)。 And likewise, restore it (in PHP) to display results.
同样,还原它(在PHP中)以显示结果。 Is there any fast, consistent and reliable way to do that?
是否有任何快速,一致和可靠的方法来做到这一点?
Some solutions are: 一些解决方案是:
Any ideas appreciated! 任何想法表示赞赏!
If Mahout can use a compound ID of two longs, you can use: 如果Mahout可以使用两个long的复合ID,则可以使用:
UUID uuid = UUID.fromString(string);
long l1 = uuid.getMostSignificantBits();
long l2 = uuid.getLeastSignificantBits();
If you really are stuck with one long, then I'd agree with your idea to use a portion of a hash based on the entire UUID 如果您确实坚持了很长时间,那么我会同意您的想法,即根据整个UUID使用哈希的一部分
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