Help needed in handling ajax call with parameter in Spring3 MVC.

Hi,

I am using Spring 3 MVC for an application.

On a page, we have a drop down which contains department names so by selecting specific department name by a user we need to display department information on that page. I am using ajax call

I am using onchange event after user selects specific department name from the drop down which calls a javascript function getDepartmentInfo().

getDepartmentInfo() - creates request, prepares URL and passes department name selected

Code :

---

      function getDepartmentInfo(deptName) {
	    request = createRequestObject();
	    if (request == null) {
	    	alert("Unable to create request");
	    } 
 
	    var url = "/departmentInfo?departmentName="+deptName;
	    request.open("GET", url, true);
	    request.onreadystatechange = processDepartmentDetails;
	    request.send(null);
        }

---

processDepartmentDetails - to process the response and to display the information.

In Spring Controller :

Code :

---

@Controller
public class DepartmentController {
 
	@Autowired
    private DepartmentService departmentService;
 
	@RequestMapping(value="/departmentInfo", method=RequestMethod.GET)
	public String getDepartmentInformation(@ModelAttribute(value="departmentName") String departmentName, Map<String, Object> map) {
		System.out.println("department Name " + departmentName);
            map.put("departmentInfo", departmentService.getdepartmentInfo(departmentName));
     	    return "/home";
	}
}

---

But, the ajax request is not reaching the controller. Its working fine after I remove the parameter from ajax call i.e.

Code :

---

    var url = "/departmentInfo;
    request.open("GET", url, true);
    request.onreadystatechange = processDepartmentDetails;
    request.send(null);

---

Please let me know how to pass parameter from ajax and handle the request in Spring?

Thanks and Regards,
Chinnu