使用 RegEx 从 URL 获取路径变量

Question

How do I get the customerid path variable from the following URL:

/customers/{customerid}/agreements/{agreementid}

The customerid path variable can vary in length, so I want everything between /customers/ and /agreements...

I have searched the net for a solution and tried to construct some RegEx myself but so far unsuccesfully.

Answer 1

If you know the order of the elements in the URL is fixed (Ie there is nothing before the /customers segment, like a site/languages prefixes - /uk ), you can just split the URL and grab the 2nd element in the resulting array. Like so:

var urlParts = url.split('/');
var customerId = urlParts[1]; // Arrays positions start at 0.

Or more elegantly:

var customerId = url.split('/')[1];

If you're not sure about the URL structure, but know that the customer ID is always right after the /customers segment, you can use regular expression to extract it.

UPDATE: I just realized you were referring to Java, but the above solutions are still valid. Here's a similar question about URL splitting in Java: In java, what's the best way to read a url and split it into its parts?