如何在Spring MVC中创建含未知数量@PathVariable的URL模式？

Alright, let's tackle this problem. You need a flexible URL pattern that can match all /asset/ paths with any number of nested path variables, right? Here's how to handle this across common frameworks and use cases:

For Spring MVC (since you mentioned @PathVariable) #

If you're working in Spring MVC and need to handle these dynamic paths, you have two practical approaches:

1. Capture the full subpath as a single variable
   Use the /** wildcard to grab everything after /asset/ into one @PathVariable. This works great if you just need to process the complete path segment without splitting individual variables:

   @GetMapping("/asset/**")
   public String handleAssetPaths(@PathVariable("fullSubpath") String fullSubpath) {
       // fullSubpath will be the entire string after /asset/, e.g., "pathvariable10/pathvariable11/pathvariable12"
       return processAssetPath(fullSubpath);
   }
   

   The variable name fullSubpath is just a convention—feel free to name it something that fits your workflow.

2. Capture individual segments as a list
   If you need to access each path variable separately (even when the count is unknown), use a List<String> with the /** pattern. Spring will automatically split the subpath into individual segments for you:

   @GetMapping("/asset/**")
   public String handleAssetPaths(@PathVariable List<String> pathSegments) {
       // pathSegments will be a list like ["pathvariable30", "pathvariable31", "pathvariable32", "pathvariable33", "pathvariable34"]
       return processAssetSegments(pathSegments);
   }
   

For General Routing Systems (Nginx, Express.js, Apache, etc.) #

Most modern routing frameworks support the ** wildcard to match any number of nested path segments. Here's how to define the pattern for common tools:

• Nginx: Use location ~ ^/asset/(.*)$ { ... } — the (.*) captures everything after /asset/ for you to use in your handler
• Express.js: Define your route as app.get('/asset/**', (req, res) => { ... }) — the full subpath will be available in req.params[0]
• Apache: Use a rewrite rule like RewriteRule ^/asset/(.*)$ /your-handler?assetPath=$1 [L] to pass the subpath as a query parameter

Quick Tips #

• The ** wildcard is the standard for matching any number of path segments (including zero, though you can add a quick check in your handler if you need to enforce a minimum number of segments)
• If you ever need to restrict the pattern to only match paths with, say, 3+ segments, you can combine wildcards (e.g., /asset/*/*/**), but this is rarely necessary unless you have strict routing rules.

内容的提问来源于stack exchange，提问作者James Mwaiponya