java服务端响应不了post请求

package net.shopxx.aa;

import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;

import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

import net.shopxx.util.JsonUtils;

import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.context.request.RequestAttributes;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.context.request.ServletRequestAttributes;

@Controller("androidController")
 @RequestMapping("/user")
 public class LoginControl {
@RequestMapping(value="/signin", method = RequestMethod.POST)
public @ResponseBody
String login(String name,String password) {

    System.out.print("....\n");
    String j="hello";
    return JsonUtils.toJson(j);
}

上边是代码，没有具体功能的，我只需要Android端能连接上去服务端就可以了