How to split Spring MVC request mapping by parameter value

Question

In Spring MVC 3 I want to handle the same url with two different controller classes - depending on value of url parameter. @RequestMapping annotation even has such field: params, and I thought following would be two different mappings (I use mapping on class level):

@RequestMapping(value = "/myurl", params = "name=val1")

and

@RequestMapping(value = "/myurl", params = "name=val2")

but it's not. Spring throws exception for second case that controller for /myurl already mapped (by first case).

Is there some accurate solution for splitting request mapping by parameter? May be extending @RequestMapping or using proxy as controller and call different controllers depending on parameter... Any thoughts?

UPDATE This works but only on methods level, not on class level... This will:

@Controller
@RequestMapping(value = "/myurl")
public class Class123 {

    @RequestMapping(value = {"edit.htm"}, params = "src=1")
    public String open1(Map<String, Object> map) throws Exception {....}

    @RequestMapping(value = {"edit.htm"}, params = "src=2")
    public String open2(Map<String, Object> map) throws Exception {....}
}

this won't:

@Controller
@RequestMapping(value = "/myurl", params = "src=1")
public class Class123_1 {

    @RequestMapping(value = {"edit.htm"})
    public String open(Map<String, Object> map) throws Exception {....}
}


@Controller
@RequestMapping(value = "/myurl", params = "src=2")
public class Class123_2 {

    @RequestMapping(value = {"edit.htm"})
    public String open(Map<String, Object> map) throws Exception {....}
}

And I would like to split logic in different classes.

Answer 1

It sounds like a difference between using RequestMappingHandlerMapping (new in Spring 3.1) vs DefaultAnnotationHandlerMapping (the class replaced by RequestMappingHandlerMapping).