Ａndroid 常用的时间工具类

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Ａndroid 常用的一些工具类

１.时间对象转换成字符串

public static String date2string(Date date) {        String strDate = "";        SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        strDate = sdf.format(date);        return strDate;    }

2.时间工具类

/** * 时间处理 */public class DateUtils {    public static final String ENG_DATE_FROMAT = "EEE, d MMM yyyy HH:mm:ss z";    public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";    public static final String YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";    public static final String YYYY_MM_DD = "yyyy-MM-dd";    public static final String YYYY = "yyyy";    public static final String MM = "MM";    public static final String DD = "dd";    public static String generateTime(long time) {        int totalSeconds = (int) (time / 1000);        int seconds = totalSeconds % 60;        int minutes = (totalSeconds / 60) % 60;        int hours = totalSeconds / 3600;        return hours > 0 ? String.format("%02d:%02d:%02d", hours, minutes, seconds) : String.format("%02d:%02d", minutes, seconds);    }    /** 根据long毫秒数，获得时分秒 **/    public static String getDateFormatByLong(long time) {        int totalSeconds = (int) (time / 1000);        int seconds = totalSeconds % 60;        int minutes = (totalSeconds / 60) % 60;        int hours = totalSeconds / 3600;        return String.format("%02d:%02d:%02d", hours, minutes, seconds);    }    /**     * @param     * @return     * @描述 —— 格式化日期对象     */    public static Date date2date(Date date) {        SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        String str = sdf.format(date);        try {            date = sdf.parse(str);        } catch (Exception e) {            return null;        }        return date;    }    /**     * @param     * @return     * @描述 —— 时间对象转换成字符串     */    public static String date2string(Date date) {        String strDate = "";        SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        strDate = sdf.format(date);        return strDate;    }    /**     * 通过时间获得文件名     * @param date     * @return     */    public static String getFileNameByDate(Date date) {        String strDate = "";        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");        strDate = sdf.format(date);        return strDate;    }    /**     * @param     * @return     * @作者     * @创建日期     * @创建时间     * @描述 —— sql时间对象转换成字符串     */    public static String timestamp2string(Timestamp timestamp) {        String strDate = "";        SimpleDateFormat sdf = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        strDate = sdf.format(timestamp);        return strDate;    }    /**     * @param dateString     * @return     * @描述 —— 字符串转换成时间对象     */    public static Date string2date(String dateString) {        Date formateDate = null;        DateFormat format = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        try {            formateDate = format.parse(dateString);        } catch (ParseException e) {            return null;        }        return formateDate;    }    /**     * @param date     * @return     * @描述 —— Date类型转换为Timestamp类型     */    public static Timestamp date2timestamp(Date date) {        if (date == null)            return null;        return new Timestamp(date.getTime());    }    /**     * @return     * @描述 —— 获得当前年份     */    public static String getNowYear() {        SimpleDateFormat sdf = new SimpleDateFormat(YYYY);        return sdf.format(new Date());    }    /**     * @return     * @描述 —— 获得当前月份     */    public static String getNowMonth() {        SimpleDateFormat sdf = new SimpleDateFormat(MM);        return sdf.format(new Date());    }    /**     * @return     * @描述 —— 获得当前日期中的日     */    public static String getNowDay() {        SimpleDateFormat sdf = new SimpleDateFormat(DD);        return sdf.format(new Date());    }    /**     * @param time     * @return     * @描述 —— 指定时间距离当前时间的中文信息     */    public static String getFriendlyTime(long time) {        Calendar cal = Calendar.getInstance();        long timel = cal.getTimeInMillis() - time;        if (timel / 1000 < 60) {            return "1分钟以内";        } else if (timel / 1000 / 60 < 60) {            return timel / 1000 / 60 + "分钟前";        } else if (timel / 1000 / 60 / 60 < 24) {            return timel / 1000 / 60 / 60 + "小时前";        } else {            return timel / 1000 / 60 / 60 / 24 + "天前";        }    }    /**     * 以友好的方式显示时间     * @param time     * @return     */    public static String getFriendlyTime(Date time) {          //获取time距离当前的秒数          int ct = (int)((System.currentTimeMillis() - time.getTime())/1000);          if(ct == 0) {              return "刚刚";          }          if(ct > 0 && ct < 60) {              return ct + "秒前";          }          if(ct >= 60 && ct < 3600) {              return Math.max(ct / 60,1) + "分钟前";          }          if(ct >= 3600 && ct < 86400)              return ct / 3600 + "小时前";          if(ct >= 86400 && ct < 2592000){ //86400 * 30              int day = ct / 86400 ;                         return day + "天前";          }          if(ct >= 2592000 && ct < 31104000) { //86400 * 30              return ct / 2592000 + "月前";          }          return ct / 31104000 + "年前";      }     /**     * 格式化日期字符串     * @param currentTime     * @return     */    public static String formatString(String currentTime) {        DateFormat format = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);        return format.format(currentTime);    }}

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