Spring MVC Controllers Return Type

Question

I\'ve seen examples where a controller returns a String (which indicates the view)

@RequestMapping(value=\"/owners/{ownerId}\", method=RequestMethod.GET)
pub         


        

Answer 1

public String findOwner(@PathVariable String ownerId, Model model) {
  Owner owner = ownerService.findOwner(ownerId);  
  model.addAttribute("owner", owner);  
  return "displayOwner"
}                       

in this method the return type is String and we adding Model as a parameter so to add a value with model we will add like

 modelparam.addAttribute("obj",value);  

and return to the displayowner to jsp as per view resolver

public ModelAndView helloWorld() {
    ModelAndView mav = new ModelAndView();
    mav.setViewName("helloWorld");
    mav.addObject("message", "Hello World!");
    return mav;
}

in this method the return type is ModelAndView so we will return the model and here the mav is the object of ModelAndView so here we should add like

model.addObject("object","value");

here the viewname is returned to helloworld.jsp as per the viewResolver