正则表达式验证E_mail

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;
 }