java 验证邮箱格式

       
        Pattern pattern=Pattern.compile("^([a-z0-9A-Z]+[-|_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$");
        Matcher matcher = pattern.matcher(getUserName());
        if(!matcher.matches()){
        model.addAttribute("message", "邮箱格式错误");
             return "register";
        }