Java Week getWeekAgo()

Description

get Week Ago

License

Open Source License

Declaration

public static Date getWeekAgo() 

Method Source Code

//package com.java2s;

import java.text.SimpleDateFormat;

import java.util.Calendar;
import java.util.Date;

public class Main {

    public static Date getWeekAgo() {
        Date date = new Date();
        long time = date.getTime() / 1000L - 604800L;
        date.setTime(time * 1000L);/*from w ww  .  j a  v a  2s. c o  m*/
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        try {
            date = format.parse(format.format(date));
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
        return date;
    }

    public static Date getWeekAgo(Date date) {
        Date newDate = (Date) date.clone();
        long time = newDate.getTime() / 1000L - 604800L;
        newDate.setTime(time * 1000L);
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        try {
            newDate = format.parse(format.format(newDate));
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }
        return newDate;
    }

    public static String getTime(int format) {
        StringBuffer cTime = new StringBuffer(10);
        Calendar time = Calendar.getInstance();
        int miltime = time.get(14);
        int second = time.get(13);
        int minute = time.get(12);
        int hour = time.get(11);
        int day = time.get(5);
        int month = time.get(2) + 1;
        int year = time.get(1);
        if (format != 14)
            if (year >= 2000)
                year -= 2000;
            else
                year -= 1900;

        if (format >= 2)
            if (format == 14)
                cTime.append(year);
            else
                cTime.append(getFormatTime(year, 2));

        if (format >= 4)
            cTime.append(getFormatTime(month, 2));
        if (format >= 6)
            cTime.append(getFormatTime(day, 2));
        if (format >= 8)
            cTime.append(getFormatTime(hour, 2));
        if (format >= 10)
            cTime.append(getFormatTime(minute, 2));
        if (format >= 12)
            cTime.append(getFormatTime(second, 2));
        if (format >= 15)
            cTime.append(getFormatTime(miltime, 3));
        return cTime.toString();
    }

    private static String getFormatTime(int time, int format) {
        StringBuffer numm = new StringBuffer();
        int length = String.valueOf(time).length();
        if (format < length)
            return null;
        for (int i = 0; i < format - length; ++i)
            numm.append("0");

        numm.append(time);
        return numm.toString().trim();
    }
}

Related

1. getWeek(Date date)
2. getWeek(int duration)
3. getWeek(SimpleDateFormat df, String dateStr)
4. getWeek(String date)
5. getWeek(String pTime)
6. getWeekBegin(Date date)
7. getWeekDates(int weekOffset)
8. getWeekFirst(String format)
9. getWeekFromDate(String dateString)