问Spring非英语字符

EN

public class User {
    // Allow only ASCII letters, numbers, '-', '.' and '_'
    @Pattern(regexp="^[a-zA-Z0-9-_\\.]+$")
    private String username;
}

@RequestMapping(value="/users", method=RequestMethod.POST)
public String createUser(@ModelAttribute("User") @Valid User user, BindingResult bindingResult) {
    if (bindingResult.hasErrors()) {
         // Invalid data entered ...
    }
}