Spring 3.0 multiple @PathVariable's problem

Question

In my application I have to compare 3 products for that in my controller I mapped request as

@RequestMapping(value = "/products/{proId1}Vs{proId2}Vs{proId3}", method = RequestMethod.GET)
public ModelAndView compareThreeProducts(@PathVariable("proId1") int id1, @PathVariable("proId2") int id2, @PathVariable("proId3") int id3)
{
   //someLogic

when hit my url(http://something/products/12Vs13Vs14)

I'm getting http 400 error

I also tried for 2 @pathVariable like

@RequestMapping(value = "/products/{proId1}Vs{proId2}", method = RequestMethod.GET)
public ModelAndView compareTwoProducts(@PathVariable("proId1") int id1, @PathVariable("proId2") int id2) 

this is working fine but why i'm facing problem with 3 variables and also there are no errors in server log then how to find what's the bug.

any solution??

Answer 1

You could try lumping everything into one path variable then parsing it manually:

@RequestMapping(value = "/products/{compareIdString}", method = RequestMethod.GET)
public ModelAndView compareThreeProducts(@PathVariable("compareIdString") String compareIdString)
{
    // split compareIdString on "Vs"
    // parse each resulting value to an int

This is more of a workaround than a solution, though. You might want to debug in the Spring code as Bozho suggested if you want to try to figure out exactly what's going wrong.

Answer 2

How about explicitly specifying the regex you want each path variable to match, as described here?

@RequestMapping(value = "/products/{proId1:\d+}Vs{proId2:\d+}Vs{proId3:\d+}", method = RequestMethod.GET)

Answer 3

• make sure the problem is not in the response - put a breakpoint in the method and see if it is invoked
• check log files for any indications
• try using slashes as separator /products/{p1}/{p2}/{p3} or /products/{p1}/vs/{p2}/vs/{p3}