Restful Path Parameters in Spring MVC 3

Question

Is it possible to: set a URI template in the mvc:view-controller element of the *-servlet.xml file or in a controller method and then use/get that path parameter in a jsp?

I understand that using @PathVariable in a controller method will give me access to the path parameter in that controller method. But how can I gain access to the path parameter in the jsp?

For example, is it possible to do something like:

*-servlet.xml file:

<beans...>
<mvc:view-controller path="/home" view-name="home"/>
<mvc:view-controller path="/home/{error}" view-name="home"/>
</beans>

jsp file:

<c:if test="${not empty param['error']}">
<span class="error">You have an error...</span>
</c:if>

Affe · Accepted Answer · 2010-06-02 00:29:05Z

16

If you want access to it in the jsp, return it as an attribute from the controller:

@RequestMapping("/home/{error}")
public void handleError(@PathVariable String error, ModelMap model) {
    //your regular stuff

    model.addAttribute("error", error);
}

-

<c:if test="${not empty error}">
<span class="error">You have an error...</span>
</c:if>

edited Jun 2, 2010 at 0:29

answered Jun 1, 2010 at 15:52

Affe

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2 Comments

axtavt Over a year ago

Note the wrong EL syntax, ${} around error is not needed.

black sensei Over a year ago

what if there is no controller? the setup i have is just the map between the request and the page(view) how would you treat parameterized url in such a situation. thanks

axtavt · Accepted Answer · 2010-06-01 16:45:28Z

1

The Map of resolved path variables is exposed as an attirubte with name specifed by HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE. So, the solution is

<c:if test="${not empty requestScope['org.springframework.web.servlet.HandlerMapping.uriTemplateVariables']['error']}">

But accessing it this way is probably not a best idea, Affe's solution is cleaner.

answered Jun 1, 2010 at 16:45

axtavt

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