spring mvc annotation many servlet dispatcher - spring

Question

Hi I am just starting to learn Spring mvc, I use spring mvc #annotation and I have 3 servlets dispatchers (appservlet, admin, student):
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>admin</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/admin-servlet.xml</param-value>
</init-param>
</servlet>
<servlet>
<servlet-name>student</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>admin</servlet-name>
<url-pattern>*.admin</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>student</servlet-name>
<url-pattern>*.student</url-pattern>
</servlet-mapping>
</web-app>
After a test in a method I want a redirect to another servlet dispatcher, either the .admin or a .student. How can I do that please?
#controller
#Controller
public class AuthentificationController {
#RequestMapping(value = "verifier", method = RequestMethod.POST)
public ModelAndView redir(#ModelAttribute("per") Personne per,
HttpSession session) {
if (p1.equals(per)) {
session.setAttribute("login", per);
ModelAndView M = new ModelAndView(".admin");
return M;
}
if (p2.equals(per)) {
ModelAndView M = new ModelAndView(".student");
return M;
} else {
ModelAndView M = new ModelAndView("home");
return M;
}
}
}
The problem is that ModelAndView returns (.jsp) but I want a redirection for another servlet-dispatcher !!

Answer 1

Here you are:
#RequestMapping(value = "verifier", method = RequestMethod.POST)
public String redir(#ModelAttribute("per") Personne per, HttpSession session) {
if (p1.equals(per)) {
session.setAttribute("login", per);
return "redirect:.admin";
} else if (p2.equals(per)) {
return "redirect:.student"
} else {
return "home";
}
}