将模型对象从Spring控制器传递到JSP

Question

I am trying to pass a model object from spring controller to jsp. But the object is not rendering on the target page.

Controller

    @Path("test");
    public ModelandView gettest(@Context HttpServletRequest request) {
            ModelandView responseView = new ModelandView(new JsonView());
            //some code here
            if (somecondition) {
                responseView.setViewName("track/trackvehicle");
                responseView.addObject("JSONdata", vehicleID);
            }
            else {
                System.out.println("Not present");
            }
            return responseView;
        }

trackvehicle.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <input type="text" id="test_id" value="${JSONdata}"/>

But the textbox is not rendered with any data. What is the problem?

Answer 1

Change your code to:

@Controller
public class YourController {    
    @RequestMapping("test")
    public ModelAndView gettest() {
        //some code here
        if (somecondition) {
            return new ModelAndView("track/trackvehicle", "JSONdata", vehicleID);
        }

        System.out.println("Not present");
        return new ModelAndView("track/trackvehicle");
    }
}

Answer 2

You have mentioned in the comment section its ajax based in spring mvc...

how you are hitting this ajax url....

for ajax calls in spring mvc use @ResponseBody annotation and hit the url using ajax methods like classic ajax or jquery ajax or jquery get functions and load the value.

Hope this below links will give more clear picture for you

Returning ModelAndView in ajax spring mvc

How to render a View using AJAX in Spring MVC