@RequestMapping("/add")
public String add(@ModelAttribute GuestBookVo vo) {
if (vo.getMessage().trim().length() == 0
|| vo.getName().trim().length() == 0
|| vo.getPassword().trim().length() == 0
|| vo.getMessage().contains("script")
|| vo.getName().contains("script")) return "redirect:/guestbook/?result=fail";
service.add(vo);
return "redirect:/guestbook/";
}
