1.邮箱
boolean isExist = false; Pattern p = Pattern.compile("\\w+@(\\w+\\.)+[a-z]{2,3}"); Matcher m = p.matcher(email); boolean b = m.matches();
boolean isExist = false;
Pattern p = Pattern.compile("^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$");
Matcher m = p.matcher(email);
boolean b = m.matches();