How to use send.redirect() while working with Spring MVC

Question

I was trying to redirect to a dynamic page from Interceptors and Handler Mapping program. I have already defined a controller which handles and redirects (/hello.htm) through model (I have only this controller in my program). Until this point it is working fine. Apart from this, I registered a handler which will redirect to a page once it satisfies some condition.

public class WorkingHoursInterceptor extends HandlerInterceptorAdapter  {
@Override
public boolean preHandle(HttpServletRequest request,
        HttpServletResponse response, Object handler) throws Exception {
    System.out.println("In Working Hours Interceptor-pre");
    Calendar c=Calendar.getInstance();
    if(c.get(Calendar.HOUR_OF_DAY)<10||c.get(Calendar.HOUR_OF_DAY)>20){
        response.sendRedirect("/WEB-INF/jsp/failure.jsp");
                        return false;
    }
    return true;
..............
..............
} 

But once it comes to response.sendRedirect, it is showing resource not found even though the mentioned page is present. I tried to redirect to "WEB-INF/jsp/hello.jsp" as well but keeps showing the same error. If the condition in the interceptor is not satisfied, the program works fine.

Below is shown the only controller present in the program.

@Controller
public class MyController {
@RequestMapping("/hello.htm")
public ModelAndView sayGreeting(){
    String msg="Hi, Welcome to Spring MVC 3.2";
    return new ModelAndView("WEB-INF/jsp/hello.jsp","message",msg);

    }

}

(The controller for handling hello.html works fine if I change the interceptor condition)

Instead of redirecting, if I just print a message in the console, the program works fine. But once it comes to redirect it shows the error. Do I need to specify a separate controller to handle this request? Will this redirection request go to the dispatcher-servlet?

Answer 1

You need to add redirect: prefix in the view name, the code for redirect will look like:

@RequestMapping(value = "/redirect", method = RequestMethod.GET)
   public String redirect() {

      return "redirect:finalPage";
   }

OR

@RequestMapping(value = "/redirect", method = RequestMethod.GET)
public ModelAndView redirect() {

  return new ModelAndView("redirect:finalPage");
}

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