Mapping Multiple Controllers in Spring MVC - spring-mvc

Question

Define two controllers user and data as follows:
// 1st Controller
#Controller
#RequestMapping(value = {"/", "user"})
public class UserLoginController {
#Autowired
private UserLoginService userLoginService;
#RequestMapping(value = "/", method = RequestMethod.GET)
public String showLoginForm(#ModelAttribute UserLogin userLogin) {
//model.addAttribute(new UserLogin());
//System.out.println("showLoginForm() is called");
return "loginForm";
}
}
//Second COntroller
#Controller
#RequestMapping(value = "user/data/")
public class WorkplanController {
#Autowired
private WorkplanService WorkplanService;
#RequestMapping(value = "importForm", method = RequestMethod.GET)
public ModelAndView importForm(#ModelAttribute SheetUpload sheetUpload){
return new ModelAndView("uploadWorkplan");
}
#RequestMapping(value= "doUpload", method = RequestMethod.POST)
public ModelAndView doUpload(#RequestParam CommonsMultipartFile[] uploadFile, SheetUpload fileUpload, Workplan workplan, HttpServletRequest request) {
return new ModelAndView("uploadSucess");
}
}
When i make request to the doUpload(), it shows HTTP Status 400 Error.
My question is two-fold:
1. Why do have i have to include the user like this: #RequestMapping(value = "user/data/") to make request to the 2nd controller why not like this #RequestMapping(value = "data/")?
2. What do i need to change to make a successful call to the 2nd method in the second controller?
Here is the form am trying to submit:
<form:form action="doUpload" modelAttribute="sheetUpload" method="post"
enctype="multipart/form-data">
<form:select class="createusers_select_menu" path="From">
<form:option value="">Select...</form:option>
<form:option value="A">A</form:option>
<form:option value="B">B</form:option>
<form:option value="C">C</form:option>
</form:select>
<form:input class="browse_btn" path="uploadFile" type="file" />
<input type="submit" class="selct_workplan_2_btn" name="" value=" "/>
</form:form>

Answer 1

Why do have i have to include the user like this: #RequestMapping(value = "user/data/") to make request to the 2nd controller why not like this #RequestMapping(value = "data/")?
You don't have to. Change it to #RequestMapping(value="/data")
What do i need to change to make a successful call to the 2nd method in the second controller?
Try to get it working with a single file field only, then report back. There are lots of tutorials on the web to show how to upload files with Spring.