spring mvc获取request HttpServletRequest

package spittr.web;

import static org.springframework.web.bind.annotation.RequestMethod.*;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;

@Controller
@RequestMapping("/")
public class HomeController {

//@Autowired    //方法1
//private HttpServletRequest req;

@RequestMapping(method = GET)
// public String home(Model model) { //方法2
public String home(Model model, HttpServletRequest req) {
System.out.println(req.getParameter("x"));
return "home";
}

}