basecalendar.java

网上购物系统

package eshopsys.tools.util;

import java.text.DateFormat;
import java.util.*;

public class BaseCalendar {
    private Calendar  calendar = null;
	//构造函数,获取当前日期
    public BaseCalendar() {
        calendar = Calendar.getInstance();
        Date trialTime = new Date();
        calendar.setTime(trialTime);
    }
	//构造函数,根据日期参数获取时间
    public BaseCalendar(java.util.Date date) {
        calendar = Calendar.getInstance();
        calendar.setTime(date);
    }
    public Calendar getCalendar(){
    	return calendar;
    }
    public String changeIntToString(int number)
    {
      String[] str = new String [] {
          "01", "02", "03",
          "04", "05", "06",
          "07", "08", "09",
      };
      if(number < 10 && number > 0)
        return str[number-1];
      else
        return String.valueOf(number);
    }
    public int getYear() {
        return calendar.get(Calendar.YEAR);
    }
    public String getMonth() {
        return changeIntToString(getMonthInt());
    }
    public String getNextMonth() {
        if (getMonthInt() < 12)
          return getYear() + "-" + changeIntToString(getMonthInt() + 1);
        else
          return (getYear()+1) + "-01";
    }
    public String getDay() {
        int x = getDayOfWeek();
        String[] days = new String[] {"日", "一", "二",
                                      "三", "四", "五","六"};
        if (x > 7)
            return "Unknown";
        return days[x - 1];
    }
    public int getMonthInt() {
        return 1 + calendar.get(Calendar.MONTH);
    }
    public String getDate() {
        return getYear() + "-" + getMonth() + "-" + getDayOfMonth();
    }
    public String getTime() {
        return getHour() + ":" + getMinute() + ":" + getSecond();
    }
    public String getDateAndTime() {
      return getDate() + " " + getTime();
    }
    public String getDayOfMonth() {
        return changeIntToString(calendar.get(Calendar.DAY_OF_MONTH));
    }
    public int getDayOfYear() {
        return calendar.get(Calendar.DAY_OF_YEAR);
    }
    public int getWeekOfYear() {
        return calendar.get(Calendar.WEEK_OF_YEAR);
    }
    public int getWeekOfMonth() {
        return calendar.get(Calendar.WEEK_OF_MONTH);
    }
    public int getDayOfWeek() {
        return calendar.get(Calendar.DAY_OF_WEEK)-1;
    }
    public String getHour() {
        return changeIntToString(calendar.get(Calendar.HOUR_OF_DAY));
    }
    public String getMinute() {
        return changeIntToString(calendar.get(Calendar.MINUTE));
    }
    public String getSecond() {
        return changeIntToString(calendar.get(Calendar.SECOND));
    }
    public int getAMPM() {
        return calendar.get(Calendar.AM_PM);
    }
    //日期加减运算
    public String addDate(Date date, int day) {
		calendar.setTimeInMillis(
calendar.getTimeInMillis() + ((long) day) * 24 * 3600 * 1000);
		return getDate();
	} 
}