Java实现日期格式校验

/**
 * 校验时间字符串是否合法
 *
 * @param dateStr the date str
 * @param pattern the pattern
 * @return the boolean
 */
public static boolean validDateStr(String dateStr, String pattern) {
    if (StringUtil.isEmpty(pattern)) {
        pattern = "yyyy-MM-dd HH:mm:ss";
    }
    try {
        LocalDate.parse(dateStr, new DateTimeFormatterBuilder().appendPattern(pattern).parseStrict().toFormatter());
        return true;
    } catch (Exception e) {
        return false;
    }
}