检测日期格式是否为yyyy-MM-dd
/** * 校验日期格式是否为yyyy-MM-dd * @param timeStr 正确返回true * @return */ public static boolean valiDateFormat(String timeStr) { String format = "((19|20)[0-9]{2})-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"; Pattern pattern = Pattern.compile(format); Matcher matcher = pattern.matcher(timeStr); if (matcher.matches()) { pattern = Pattern.compile("(\\d{4})-(\\d+)-(\\d+).*"); matcher = pattern.matcher(timeStr); if (matcher.matches()) { int y = Integer.valueOf(matcher.group(1)); int m = Integer.valueOf(matcher.group(2)); int d = Integer.valueOf(matcher.group(3)); if (d > 28) { Calendar c = Calendar.getInstance(); c.set(y, m-1, 1); int lastDay = c.getActualMaximum(Calendar.DAY_OF_MONTH); return (lastDay >= d); } } return true; } return false; }