您好有什么方法可以檢查給定的字符串是否是 epoch millisjava.time 包中的以下代碼轉換為 EpochMillis。我正在尋找 isEpochMillis 以返回布爾條件。是否有來自 apache commons 或 google guava 的現成的 api 來檢查這個？就像 isDouble isLong 等.../**     * Obtains an instance of {@code Instant} using milliseconds from the     * epoch of 1970-01-01T00:00:00Z.     * <p>     * The seconds and nanoseconds are extracted from the specified milliseconds.     *     * @param epochMilli  the number of milliseconds from 1970-01-01T00:00:00Z     * @return an instant, not null     * @throws DateTimeException if the instant exceeds the maximum or minimum instant     */    public static Instant ofEpochMilli(long epochMilli) {        long secs = Math.floorDiv(epochMilli, 1000);        int mos = (int)Math.floorMod(epochMilli, 1000);        return create(secs, mos * 1000_000);    }