java正则表达式——判断日期格式

//匹配函数
private static boolean isMatch(String regex, String orginal){
if (orginal == null || orginal.trim().equals("")) {
return false;
}
Pattern pattern = Pattern.compile(regex);
Matcher isNum = pattern.matcher(orginal);
return isNum.matches();
}

//是否为日期,只能判断yyyy-mm-dd/yyyy.mm.dd hh:MM:ss
public static boolean isDate(String orginal){
return isMatch("\\d{4}[-.]\\d{1,2}[-.]\\d{1,2}(\\s\\d{2}:\\d{2}(:\\d{2})?)?", orginal);
}