removing GET parameters from URL Spring 4 - spring

Question

I have multilanguage installed on my spring app, and I don't want the 'lang' parameter to appear in the URL (I'm storing the locale with sessionLocaleResolver or cookieLocaleResolver/neither works).
I've searched for hours to find a solution to this issue, although apparently it should already be working with what I've done. Here's my code :
The view (welcome.jsp) :
Language : English|Francais|Romanian
<h2>welcome.springmvc : <spring:message code="welcome.text" text="default text" /></h2>
My servlet.xml
<!-- Multi-Language / Localization Setup -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<bean id="localeChangeInterceptor"
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="lang" />
</bean>
</mvc:interceptor>
</mvc:interceptors>
<mvc:annotation-driven ignore-default-model-on-redirect="true" />
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basenames">
<list>
<value>classpath:lang.files/welcome</value>
<!-- <value>classpath:messages2</value> -->
</list>
</property>
<property name="defaultEncoding" value="UTF-8" />
</bean>
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<property name="defaultLocale" value="en" />
<property name="cookieName" value="lang" />
<property name="cookieMaxAge" value="60000" />
<property name="cookiePath" value="/" />
</bean>
My Controller code - note that I'm staying in the same page when I click on the link to change the language. Because ideally it would be a dropdown, and I'd stay in the same page
#RequestMapping("/welcome")
public ModelAndView helloWorld() {
String message = "<br/ ><div style='text-align:center;'>"
+ "<h3>********** Hello World, Spring MVC Tutorial</h3></div><br />";
ModelAndView mv = new ModelAndView();
// ModelAndView mv = new ModelAndView(new
// RedirectView("welcome.do", true, true, true));
RedirectView view = new RedirectView("/welcome", true);
view.setExposeModelAttributes(false);
mv.setView(view);
mv.addObject("message", message);
mv.addObject("activities", activityService.getAll());
mv.addObject("act", activityService.getR());
return new ModelAndView(view);
}
The result is a '404' saying that 'localhost/myapp/welcome' is not found.
Finally this the controller, working, but adding the 'lang' parameter in the URL :
#RequestMapping("/welcome")
public ModelAndView helloWorld() {
String message = "<br/ ><div style='text-align:center;'>"
+ "<h3>********** Hello World, Spring MVC Tutorial</h3></div><br />";
ModelAndView mv = new ModelAndView();
mv.addObject("message", message);
mv.addObject("activities", activityService.getAll());
mv.addObject("act", activityService.getR());
return mv;
}
Please help.
Thanks :)

Answer 1

#RequestMapping("/welcome")
public ModelAndView helloWorld() {
String message = "<br/ ><div style='text-align:center;'>"
+ "<h3>********** Hello World, Spring MVC Tutorial</h3></div><br />";
ModelAndView mv = new ModelAndView();
// ModelAndView mv = new ModelAndView(new
// RedirectView("welcome.do", true, true, true));
RedirectView view = new RedirectView("/welcome", true);
view.setExposeModelAttributes(false);
mv.setView(view);
mv.addObject("message", message);
mv.addObject("activities", activityService.getAll());
mv.addObject("act", activityService.getR());
return new ModelAndView(view);
}
This code causes an infinite loop as you are redirecting to /welcome over and over again.
Moreover when you've got a link like English the parameter will always appear in the url when you click on it.
The easiest way(not best) to achieve the goal you want is to create another controller method like
#RequestMapping("/changeLocale")
public ModelAndView changeLocale() {
RedirectView redirectView = new RedirectView("/welcome");
redirectView.setExposePathVariables(false);
return new ModelAndView(redirectView);
}
And links will look like
English|Francais|Romanian