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.Calendar;

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

    public static String getPreWeekDayByStr(String curday) {
        try {//from  w w w . j  a va 2s  .  c  o  m
            java.util.Date date = str2utilDate(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() - week * 24 * 3600 * 1000));
        } catch (Exception e) {
            System.out.println("DateUtil.getYearWeek(str) Error:e = " + e);
            return "";
        }
    }

    public static java.util.Date str2utilDate(String str) {
        try {
            java.util.Date udate = yyyyMMdd.parse(str);
            return udate;
        } catch (Exception e) {
            System.out.println("DateUtil.str2utilDate(str) Error:e = " + e);
            return null;
        }
    }

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

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)
8. getThisWeek()