HELP - weird thing happening with spring mvc

Need help, this made my head spin. Look at the code

This does not work

Code:

---

@Controller
public class EmployeeProfileController {

    @RequestMapping("/expenses_employee")
    public Object index(HttpSession session) {
        ModelAndView mv = new ModelAndView("home");
       
        return mv;
    }
}

---

However, this does

Code:

---

@Controller
public class EmployeeProfileController {

    @RequestMapping("/expenses_employee")
    public Object index(HttpSession session) {
       
        return "home";
    }
}

---

I used this as resolver

Code:

---

<bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
        <property name="order" value="1" />
    </bean>

---

The weird thing is that 2 of my controllers having EXACTLY the same code, works for both cases.
The problem is that I need to pass variables to the View from the Controller.

Note that this is only a sample code, if the code logic did not make sense just ignore it. I just want to know why it does not work.

I am becoming desperate here:confused::confused:
Please I need help.
Thank you for any help you can provide.

Change your return types to match more closely what you're returning. Change "Object" to "ModelAndView", and it should work better.

Perhaps when the return type is Object they default to using toString(). The toString() for a ModelAndView does not return the view name.

If you specified the return type, which you should, then it works fine.

That was what I tried before I changed it to object.

It does not care what viewname I use, it still uses the request mapping.
Like in the code below, instead of going to home.jsp, it goes to expenses_employee.jsp and drops all objects I included in the ModelAndView

Code:

---

@RequestMapping("/expenses_employee")
    public ModelAndView index(HttpSession session) {
        ModelAndView mv = new ModelAndView("home");
        mv.addObject("pageIndex", Constants.EXPENSES_PAGE_INDEX);
        return mv;
    }

---

Do this and see if this works for you

Code:

---

@Controller
@RequestMapping("/expenses_employee")
public class EmployeeProfileController {

    @RequestMapping(method=RequestMethod.GET)
    public String index(HttpSession session, ModelMap mv) {
        mv.addObject("pageIndex", Constants.EXPENSES_PAGE_INDEX);
        return <put yr url where you want it goes>
    }
}

---

What is the point of the HttpSession parameter? Could you please try removing that?

WOW it works now. Thanks everyone for your help! This is the simplified code that still works employing the same code

Code:

---

@Controller
public class EmployeePayrollController {

    @RequestMapping("expenses_payroll")
    public String index(HttpSession session, ModelMap mv) {
        mv.addAttribute("pageIndex", Constants.EXPENSES_PAGE_INDEX);
        return "expenses_payroll";
    }
}

---

By the way, why did the old code not work? I would like to understand so that I could better comprehend Spring... By appearance, it should have worked, to me at least, and it did work on some controllers

Thanks everyone for your help!