Question

I have a problem with Spring 3.0.7 Request mapping and the Spring standard theme implementation.

My controllers are implemented as follows

@ Controller
@RequestMapping(value="myUrl")
Public MyControllerClass

 @RequestMapping(Method=requestMethod.GET)
 Public myGetHandler (){
 }

So a URL with http://myApp/myUrl is handled and all is good.

Themes are activated by a link link this

 <a href="?theme=mytheme"/>

and the spring config for themes is

<bean id="themeChangeInterceptor" class="org.springframework.web.servlet.theme.ThemeChangeInterceptor">
    <property name="paramName" value="theme" />
</bean>

So if I am on the myUrl page and I click this link the theme is loaded and myGetHandler also invoked.

however

if I add a parameter to my URL

 /myUrl?someParm=somevalue 

now my controller works as before and i can access the parameter but clicking on the themes link ( see href above ) which for this page looks like this

/myUrl?theme=myTheme

causes an exception and neither the page or the theme load. I will post the stack trace later but it suggested a problem in the controller ( and not theme interceptor ).

How can I map my controller so that themes and a parameterized URL work? Ideally I think I want to change my request mapping to only handle my parameterized url and nothing else ?

I tried changing my request mapping to

   @RequestMapping(value="myUrl",params = "someParam=someValue") 

While this works for the links with my parameters it fails for the theme link.

Answer 1

My guess is then in case when url is with params , click on <a href="?theme=mytheme"/> casues double “?” in destination url like /myUrl?someParm=somevalue?theme=mytheme.

You should use something like c:url or some javascript to build url with only one ? and & as params delimeter