<form action="/test.action" method="post"> 
 <input name="user.name"> 
 <input name="acc.name"> 
 <input type="submit"> 
</form> 

@RequestMapping("/test.action")
public void test(Account account, User user){
 System.out.println(user);
 System.out.println(account);
} 

@InitBinder("account") 
public void initAccountBinder(WebDataBinder binder) { 
 binder.setFieldDefaultPrefix("acc."); 
} 

@InitBinder("user") 
public void initUserBinder(WebDataBinder binder) { 
 binder.setFieldDefaultPrefix("user."); 
}

@RequestMapping("/test.action")
public void test(@ModelAttribute("account") Account account, @ModelAttribute("user") User user){
 System.out.println(user);
 System.out.println(account);
}