java日期int和String互转

 /**     * 时间unix转换     * @param timestampString     * @return     */    public static String TimeStampDate(String timestampString, String format) {        Long timestamp = Long.parseLong(timestampString) * 1000;        String date = new java.text.SimpleDateFormat(format).format(new java.util.Date(timestamp));        return date;    }    /**     * 将时间unix转换为int类型     * @param timeString     * @param format     * @return     */    public static int DateToInt(String timeString, String format) {        int time = 0;        try {            SimpleDateFormat sdf = new SimpleDateFormat(format);            Date date = sdf.parse(timeString);            String strTime = date.getTime() + "";            strTime = strTime.substring(0, 10);            time = Integer.parseInt(strTime);        }        catch (ParseException e) {            e.printStackTrace();        }        return time;    }