@RequestMapping(value="user/{id}/{name}",method=RequestMethod.GET)
  public String printMessage1(@PathVariable String id,@PathVariable String name, ModelMap model) {
    
    System.out.println(id);
    System.out.println(name);
    model.addAttribute("message", "111111");
    return "users";
  }

<form method="post" action="hao.do">
  a: <input id="a" type="text"  name="a"/>
  b: <input id="b" type="text"  name="b"/>
  <input type="submit" value="Submit" />
 </form>

  public class Pojo{
    private String a;
    private int b;
  }

@RequestMapping(method = RequestMethod.POST) 
public String processSubmit(@ModelAttribute("pojo") Pojo pojo) { 
  
  return "helloWorld"; 
}

@RequestMapping(method = RequestMethod.GET) 
public String get(HttpServletRequest request, HttpServletResponse response) { 
  System.out.println(request.getParameter("a")); 
  return "helloWorld"; 
}

@RequestMapping(value = "/requestParam", method = RequestMethod.GET) 
public String setupForm(@RequestParam("a") String a, ModelMap model) { 
  System.out.println(a); 
return "helloWorld";
}