Java Week getPreWeekDayByStr(String curday)

Description

get Pre Week Day By Str

License

Apache License

Declaration

public static String getPreWeekDayByStr(String curday) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.text.SimpleDateFormat;

import java.util.*;

public class Main {
    static public SimpleDateFormat yyyyMMdd = new SimpleDateFormat("yyyy-MM-dd");

    public static String getPreWeekDayByStr(String curday) {
        try {//  w ww .ja v a 2s.co  m
            java.util.Date date = str2date(curday);
            /*            Calendar rightNow = Calendar.getInstance();
                    rightNow.setTime(date);
                    int week = rightNow.get(Calendar.DAY_OF_WEEK);
                    if (week == 0) week = 1;
                    if (week == 7) week = 8;*/
            return getDateStr(new java.util.Date(date.getTime() - 7 * 24 * 3600 * 1000));
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }

    public static Date str2date(String str) {
        Date result = null;
        try {
            Date udate = yyyyMMdd.parse(str);
            result = new Date(udate.getTime());
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String getDateStr(java.util.Date date) {
        if (date == null)
            return "";
        try {
            return yyyyMMdd.format(date);
        } catch (Exception e) {
            e.printStackTrace();
            return "";
        }
    }

    public static String getTime(String parrten) {
        String timestr;
        if (parrten == null || parrten.equals("")) {
            parrten = "yyyyMMddHHmmss";
        }
        java.text.SimpleDateFormat sdf = new SimpleDateFormat(parrten);
        java.util.Date cday = new java.util.Date();
        timestr = sdf.format(cday);
        return timestr;
    }
}

Related

1. currentWeekEndDate()
2. getNextWeek(String week)
3. getPreWeek(String week)
4. getPreWeekDayByStr(String curday)
5. getPreWeeks(int weekNum)
6. getStartDate(Date date, int weeks, Locale locale)
7. getStartDateOfWeek(Date selectedDate, Locale locale)