Spring & JSP: Get value from certain input using spring controller - spring

Question

Can somebody help me to get value from certain input using spring controller.
I have 2 input data, and I just need a value from one of these inputs:
<input type="text" name="data01" />
<input type="text" name="data02" />
I just want to retrieve a value from "data01".
I just have used
(HttpServletRequest) request.getParameter("data01")
Or
#RequestParam(value="data01") Integer data01
but the value is null.
Can somebody help me
EDIT:
jsp:
<table>
<tr>
<input type="text" name="data01" />
<input type="text" name="data02" />
</tr>
</table>
controller:
#RequestMapping(value = "/user", method=RequestMethod.GET)
public String showAllData(ModelMap model, HttpServletRequest request) {
String retrievedData = request.getParameter("data01");
System.out.println("data= " + retrievedData);
model.addAttribute("data", new data());
return "data";
}
The retrievedData value is null.

Answer 1

You should be able to get the parameter using this method
<form action="/user" method="get">
<table>
<tr>
<input type="text" name="data01" />
<input type="text" name="data02" />
<input type="submit" value="submit"/>
</tr>
</table>
</form>
and in the controller
#RequestMapping(value = "/user", method=RequestMethod.GET)
public String showAllData(String data01, ModelMap model) {
// your logic here
}
and from the code you have posted. You are casting the parameter to HttpServletRequest
request.getParameter("data01") //returns String as default.
Integer.parseInt(request.getParameter("data01");
From your comment at #user1516735 answer, you cannot use it outside of the form tag. Unless you include it in the parameter from ajax or append the value of "name01" in the url as /user?name01=value

Answer 2

You will get the value of data01 by using the below code:
request.getParameter("data01");
Here request is of type HttpServletRequest. Make sure your input control is inside form tag.