Spring REST @RequestMapping extract incorrectly if value contains ‘.’

Problem

See following Spring REST example, if a request such as “http://localhost:8080/site/google.com” is submitted, Spring returns “google“. Look like Spring treats “.” as file extension, and extract half of the parameter value.

SiteController.java

package com.mkyong.web.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
@RequestMapping("/site")
public class SiteController {
 
	@RequestMapping(value = "/{domain}", method = RequestMethod.GET)
	public String printWelcome(@PathVariable("domain") String domain,
		ModelMap model) {
 
		model.addAttribute("domain", domain);
		return "domain";
 
	}
 
}

Solution

To fix it, make @RequestMapping supports regular expression, add “.+“, it means match anything. Now, Spring will return “google.com“.

SiteController.java

package com.mkyong.web.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
@RequestMapping("/site")
public class SiteController {
 
	@RequestMapping(value = "/{domain:.+}", method = RequestMethod.GET)
	public String printWelcome(@PathVariable("domain") String domain,
		ModelMap model) {
 
		model.addAttribute("domain", domain);
		return "domain";
 
	}
 
}