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;
    }