public boolean isJudgeEmail(String dateString){
String eL= "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
Pattern p = Pattern.compile(eL);
Matcher m = p.matcher(dateString);
boolean b = m.matches();
return b;
}