DateUtil（时间处理函数工具）

 

时间处理函数工具：得到时间戳，周一，周末，时间更改，时间精确计算。。。。

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

/**
 * 时间处理函数
 *
 * @20080509 15：50
 */
public class DateUtil {

    private static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss";

    public static final String TIME_YEAR = "yyyy";

    public static final String TIME_MONEN = "MM";

    public static final String TIME_DAY = "dd";

    public static String getDate(String interval, Date starttime, String pattern) {
        Calendar temp = Calendar.getInstance(TimeZone.getDefault());
        temp.setTime(starttime);
        temp.add(temp.MONTH, Integer.parseInt(interval));
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        return sdf.format(temp.getTime());
    }

    /**
     * 将字符串类型转换为时间类型
     *
     * @return
     */
    public static Date str2Date(String str) {
        Date d = null;
        SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
        try {
            d = sdf.parse(str);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return d;
    }

    public static Date str2Date(String str, String pattern) {
        Date d = null;
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        try {
            d = sdf.parse(str);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return d;
    }

    /**
     * 将时间格式化
     *
     * @return
     */
    public static Date DatePattern(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
        try {
            String dd = sdf.format(date);
            date = str2Date(dd);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return date;
    }

    /**
     * 将时间格式化
     */
    public static Date DatePattern(Date date, String pattern) {
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        try {
            String dd = sdf.format(date);
            date = str2Date(dd, pattern);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return date;
    }

    public static String date2Str(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
        return sdf.format(date);
    }

    public static String date2Str(Date date, String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(date);
    }

    /**
     * 获取昨天
     *
     * @param date
     * @return
     * @throws Exception
     */
    public static Date getLastDate(Date date) {
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        calendar.setTime(date);

        calendar.add(calendar.DATE, -1);

        return str2Date(date2Str(calendar.getTime()));
    }
    /**
     * 获取前几天
     * @param date
     * @return
     */
    public static Date getBeforeDate(Date date,int dates) {
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        calendar.setTime(date);

        calendar.add(calendar.DATE, -dates);

        return str2Date(date2Str(calendar.getTime()));
    }

    /**
     * 获取上周第一天（周一）
     *
     * @param date
     * @return
     * @throws Exception
     */
    public static Date getLastWeekStart(Date date) {
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        calendar.setTime(date);
        int i = calendar.get(calendar.DAY_OF_WEEK) - 1;
        int startnum = 0;
        if (i == 0) {
            startnum = 7 + 6;
        } else {
            startnum = 7 + i - 1;
        }
        calendar.add(calendar.DATE, -startnum);

        return str2Date(date2Str(calendar.getTime()));
    }

    /**
     * 获取上周最后一天（周末）
     *
     * @param date
     * @return
     * @throws Exception
     */
    public static Date getLastWeekEnd(Date date) {
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        calendar.setTime(date);
        int i = calendar.get(calendar.DAY_OF_WEEK) - 1;
        int endnum = 0;
        if (i == 0) {
            endnum = 7;
        } else {
            endnum = i;
        }
        calendar.add(calendar.DATE, -(endnum - 1));

        return str2Date(date2Str(calendar.getTime()));
    }

    /**
     * 根据年和月得到天数
     * @param num 月
     * @param year 年
     * @return
     */
    public static int getday(int num,int year){
        if(num==1 || num==3 || num==5 || num==7 || num==8 || num==10 || num==12){
            return 31;
        }else if(num==2){
            //判断是否为闰年
            if(year%400==0 || (year%4==0 && year%100!=0)){
                return 29;
            }else{
                return 28;
            }

        }else{
            return 30;
        }
    }
    /*
     * 计算当前日期距离下个月还有多少天
     */
    public static int getdaymis(Date time){
        int year = Integer.parseInt(
                new SimpleDateFormat(TIME_YEAR).format(time));//年

        int mm = Integer.parseInt(
                new SimpleDateFormat(TIME_MONEN).format(time));//月

        int dd = Integer.parseInt(
                new SimpleDateFormat(TIME_DAY).format(time));//日


        //获取当前年月的总天数
        int sdd = getday(mm,year);

        return sdd-dd;


    }
    /**
     * 日期转秒数
     * @param dateString
     * @return
     */
    public static long getTime(String dateString) {
        long time = 0;
        try {
            Date ret = null;
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            ret = sdf.parse(dateString);
            time = ret.getTime()/1000;
        } catch (Exception e) {

        }
        return time;
    }


    /**
     * 精确计算时间差，精确到日
     * @param fistill 起始日期
     * @param nowtime 结束日期
     * @param type type为1返回年月日（如：2年3个月零5天） 否则返回总的天数
     * @return
     */
    public static String patienage(Date fistill,Date nowtime,Integer type){

        int fyear = Integer.parseInt(
                new SimpleDateFormat(TIME_YEAR).format(fistill));//起始年

        int fmm = Integer.parseInt(
                new SimpleDateFormat(TIME_MONEN).format(fistill));//起始月

        int fdd = Integer.parseInt(
                new SimpleDateFormat(TIME_DAY).format(fistill));//起始日


        int nyear = Integer.parseInt(
                new SimpleDateFormat(TIME_YEAR).format(nowtime));//结束年

        int nmm = Integer.parseInt(
                new SimpleDateFormat(TIME_MONEN).format(nowtime));//结束月

        int ndd = Integer.parseInt(
                new SimpleDateFormat(TIME_DAY).format(nowtime));//结束日

        int cyear = nyear - fyear;
        int cmm = nmm - fmm;
        int cdd = ndd - fdd;


        int zyear = 0;
        int zmm = 0;
        int zdd = 0;

        int countddd = 0;  //年月日累计天数

        if(cdd<0){
            if(cmm<0){
                zyear = cyear - 1;
                zmm = (cmm + 12)-1;
                int dd = getday(zmm,nyear-1);
                zdd = dd + cdd;


                countddd = zyear*365+zmm*30+zdd;

            }else if(cmm==0){
                zyear = cyear - 1;
                zmm = 12-1;
                int dd = getday(zmm,nyear-1);
                zdd = dd + cdd;

                countddd = zyear*365+zmm*30+zdd;

            }else{
                zyear = cyear;
                zmm = cmm - 1;
                int dd = getday(zmm,nyear);
                zdd = dd + cdd;

                countddd = zyear*365+zmm*30+zdd;

            }
        }else if(cdd==0){
            if(cmm<0){
                zyear = cyear - 1;
                zmm = cmm + 12;
                zdd = 0;

                countddd = zyear*365+zmm*30;

            }else if(cmm==0){
                zyear = cyear;
                zmm = 0;
                zdd = 0;

                countddd = zyear*365+zmm*30;

            }else{
                zyear = cyear;
                zmm = cmm;
                zdd = 0;

                countddd = zyear*365+zmm*30;
            }
        }else{
            if(cmm<0){
                zyear = cyear - 1;
                zmm = cmm + 12;
                zdd = cdd;

                countddd = zyear*365+zmm*30+zdd;
            }else if(cmm==0){
                zyear = cyear;
                zmm = 0;
                zdd = cdd;

                countddd = zyear*365+zmm*30+zdd;
            }else{
                zyear = cyear;
                zmm = cmm;
                zdd = cdd;

                countddd = zyear*365+zmm*30+zdd;
            }
        }
        String ptime = null;

        if(zdd!=0){
            if(zmm!=0){
                if(zyear!=0){
                    ptime = zyear+"年"+zmm+"个月"+"零"+zdd+"天";
                }else{
                    ptime = zmm+"个月"+"零"+zdd+"天";
                }
            }else{
                if(zyear!=0){
                    ptime = zyear+"年"+"零"+zdd+"天";
                }else{
                    ptime = zdd+"天";
                }
            }
        }else{
            if(zmm!=0){
                if(zyear!=0){
                    ptime = zyear+"年"+zmm+"个月";
                }else{
                    ptime = zmm+"个月";
                }
            }else{
                if(zyear!=0){
                    ptime = zyear+"年";
                }else{
                    ptime = null;
                }
            }
        }
        if(type==1){
            return ptime;   //返回年月日（如：2年3个月零5天）
        }else{
            return String.valueOf(countddd);  //返回总天数
        }


    }
    /**
     * 得到月数
     * @param year 年数差
     * @param month 月数差
     * @return
     */
    public static int getCmm(Integer year,Integer month){
        int zmm = 0;
        if(month < 0){
            zmm = (month + 12)+(year-1)*12;
        }else if(month == 0){
            zmm = year*12;
        }else{
            zmm = year*12+month;
        }
        return zmm;
    }



    /**
     * 改更现在时间
     */
    public static Date changeDate(String type, int value) {
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        if (type.equals("month")) {
            calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) + value);
        } else if (type.equals("date")) {
            calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + value);
        }
        return calendar.getTime();
    }

    /**
     * 更改时间
     */
    public static Date changeDate(Date date, String type, int value) {
        if (date != null) {
            // Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
            Calendar calendar = new GregorianCalendar();
            calendar.setTime(date);
            // Calendar calendar = Calendar.
            if (type.equals("month")) {
                calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) + value);
            } else if (type.equals("date")) {
                calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + value);
            } else if (type.endsWith("year")) {
                calendar.set(Calendar.YEAR, calendar.get(Calendar.YEAR) + value);
            }
            return calendar.getTime();
        }
        return null;
    }

    /**
     * haoxw 比较时间是否在这两个时间点之间
     *
     * @param time1
     * @param time2
     * @return
     */
    public static boolean checkTime(String time1, String time2) {
        Calendar calendar = Calendar.getInstance();
        Date date1 = calendar.getTime();
        Date date11 = DateUtil.str2Date(DateUtil.date2Str(date1, "yyyy-MM-dd") + " " + time1);// 起始时间

        Calendar c = Calendar.getInstance();
        c.add(Calendar.DATE, 1);
        Date date2 = c.getTime();
        Date date22 = DateUtil.str2Date(DateUtil.date2Str(date2, "yyyy-MM-dd") + " " + time2);// 终止时间

        Calendar scalendar = Calendar.getInstance();
        scalendar.setTime(date11);// 起始时间

        Calendar ecalendar = Calendar.getInstance();
        ecalendar.setTime(date22);// 终止时间

        Calendar calendarnow = Calendar.getInstance();

        if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
            return true;
        } else {
            return false;
        }

    }

    /**
     * haoxw 比较时间是否在这两个时间点之间
     *
     * @param date11
     * @param date22
     * @return
     */
    public static boolean checkTime(Date date11, Date date22) {



        Calendar scalendar = Calendar.getInstance();
        scalendar.setTime(date11);// 起始时间

        Calendar ecalendar = Calendar.getInstance();
        ecalendar.setTime(date22);// 终止时间

        Calendar calendarnow = Calendar.getInstance();

        if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
            return true;
        } else {
            return false;
        }

    }


    public static boolean checkDate(String date1, String date2) {

        Date date11 = DateUtil.str2Date(date1, "yyyy-MM-dd HH:mm:ss");// 起始时间

        Date date22 = DateUtil.str2Date(date2, "yyyy-MM-dd HH:mm:ss");// 终止时间

        Calendar scalendar = Calendar.getInstance();
        scalendar.setTime(date11);// 起始时间

        Calendar ecalendar = Calendar.getInstance();
        ecalendar.setTime(date22);// 终止时间

        Calendar calendarnow = Calendar.getInstance();

        System.out.println(date11.toString());
        System.out.println(date22.toString());
        System.out.println(scalendar.toString());
        System.out.println(ecalendar.toString());
        System.out.println(calendarnow.toString());

        if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * 获取interval天之前的日期
     *
     * @param interval
     * @param starttime
     * @param pattern
     * @return
     */
    public static Date getIntervalDate(String interval, Date starttime, String pattern) {
        Calendar temp = Calendar.getInstance();
        temp.setTime(starttime);
        temp.add(temp.DATE, Integer.parseInt(interval));
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        String shijian = sdf.format(temp.getTime());
        return str2Date(shijian);
    }

    public static Date formatDate(Date date){
        SimpleDateFormat bartDateFormat =
        new SimpleDateFormat("yyyy-MM-dd");
        System.out.println(bartDateFormat.format(date));
        SimpleDateFormat bartDateFormat1 =new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date date1 = bartDateFormat1.parse(bartDateFormat.format(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        System.out.println(date.getTime());
        return date;

    }

    public static void main(String arf[]) {

        /*String time1 = "2009-05-07 19:20:00";
        String time2 = "2009-05-08 19:30:00";

        DateUtil d = new DateUtil();
        System.out.println(d.checkDate(time1, time2));
        System.out.println(d.date2Str(new Date()));*/

        //System.out.println(d.getIntervalDate("-3", new Date(), DEFAULT_PATTERN));
        Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
        System.out.println(calendar.toString());
        System.out.println(DateUtil.str2Date("20090731","yyyyMMdd"));

        System.out.println(DateUtil.getBeforeDate(new Date(),2 ));
        System.out.println(DateUtil.DatePattern(new Date()));

        SimpleDateFormat bartDateFormat =
        new SimpleDateFormat("yyyy-MM-dd");
        Date date = new Date();
        System.out.println("date;"+bartDateFormat.format(date));
        SimpleDateFormat bartDateFormat1 =new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date date1 = bartDateFormat1.parse(bartDateFormat.format(date));
            System.out.println("日期："+date1);
        } catch (ParseException e) {
            e.printStackTrace();
        }

    }

}