Android Calendar的学习与运用

zoukankan html css js c++ java

Android Calendar的学习与运用

[java]
mport java.text.DateFormat;
import
java.text.ParsePosition;
import java.text.SimpleDateFormat;
import
java.util.Calendar;
import java.util.Date;
import
java.util.GregorianCalendar;

/**
* Android Calendar的运用
* @author
Administrator
*
*/
public class CalendarUtil {

    private
int weeks = 0;// 用来全局控制上一周，本周，下一周的周数变化
    private int MaxDate; //
一月最大天数
    private int MaxYear; // 一年最大天数

    public static
void main(String[] args) {
        CalendarUtil tt = new
CalendarUtil();
        System.out.println("获取当天日期:" +
tt.getNowTime("yyyy-MM-dd"));
        System.out.println("获取本周一日期:" +
tt.getMondayOFWeek());
        System.out.println("获取本周日的日期:" +
tt.getCurrentWeekday());
        System.out.println("获取上周一日期:" +
tt.getPreviousWeekday());
        System.out.println("获取上周日日期:" +
tt.getPreviousWeekSunday());
        System.out.println("获取下周一日期:" +
tt.getNextMonday());
        System.out.println("获取下周日日期:" +
tt.getNextSunday());
        System.out.println("获得相应周的周六的日期:" +
tt.getNowTime("yyyy-MM-dd"));
        System.out.println("获取本月第一天日期:" +
tt.getFirstDayOfMonth());
        System.out.println("获取本月最后一天日期:" +
tt.getDefaultDay());
        System.out.println("获取上月第一天日期:" +
tt.getPreviousMonthFirst());
        System.out.println("获取上月最后一天的日期:" +
tt.getPreviousMonthEnd());
        System.out.println("获取下月第一天日期:" +
tt.getNextMonthFirst());
        System.out.println("获取下月最后一天日期:" +
tt.getNextMonthEnd());
        System.out.println("获取本年的第一天日期:" +
tt.getCurrentYearFirst());
        System.out.println("获取本年最后一天日期:" +
tt.getCurrentYearEnd());
        System.out.println("获取去年的第一天日期:" +
tt.getPreviousYearFirst());
        System.out.println("获取去年的最后一天日期:" +
tt.getPreviousYearEnd());
        System.out.println("获取明年第一天日期:" +
tt.getNextYearFirst());
        System.out.println("获取明年最后一天日期:" +
tt.getNextYearEnd());
        System.out.println("获取本季度第一天:" +
tt.getThisSeasonFirstTime(11));
        System.out.println("获取本季度最后一天:" +
tt.getThisSeasonFinallyTime(11));

System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:"
                +
CalendarUtil.getTwoDay("2008-12-1", "2008-9-29"));

System.out.println("获取当前月的第几周：" + tt.getWeekOfMonth());

System.out.println("获取当前年份：" + tt.getYear());

System.out.println("获取当前月份：" + tt.getMonth());

System.out.println("获取今天在本年的第几天：" + tt.getDayOfYear());

System.out.println("获得今天在本月的第几天(获得当前日)：" + tt.getDayOfMonth());

System.out.println("获得今天在本周的第几天：" + tt.getDayOfWeek());

System.out.println("获得半年后的日期："
                +
tt.convertDateToString(tt.getTimeYearNext()));
    }

public static int getYear() {
        return
Calendar.getInstance().get(Calendar.YEAR);
    }



public static int getMonth() {
        return
Calendar.getInstance().get(Calendar.MONTH) + 1;
    }



public static int getDayOfYear() {
        return
Calendar.getInstance().get(Calendar.DAY_OF_YEAR);

}


    public static int getDayOfMonth() {
        return Calendar.getInstance().get(Calendar.DAY_OF_MONTH);

}


    public static int getDayOfWeek() {
        return
Calendar.getInstance().get(Calendar.DAY_OF_WEEK);

}


    public static int getWeekOfMonth() {
        return
Calendar.getInstance().get(Calendar.DAY_OF_WEEK_IN_MONTH);

}


    public static Date getTimeYearNext() {

Calendar.getInstance().add(Calendar.DAY_OF_YEAR, 183);
        return
Calendar.getInstance().getTime();
    }


    public static
String convertDateToString(Date dateTime) {
        SimpleDateFormat df =
new SimpleDateFormat("yyyy-MM-dd");
        return
df.format(dateTime);
    }


    public static String
getTwoDay(String sj1, String sj2) {
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        long day = 0;
        try
{
            java.util.Date date = myFormatter.parse(sj1);

java.util.Date mydate = myFormatter.parse(sj2);
            day =
(date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        } catch
(Exception e) {
            return "";
        }
        return day
+ "";
    }


    public static String getWeek(String sdate)
{
        // 再转换为时间
        Date date =
CalendarUtil.strToDate(sdate);
        Calendar c =
Calendar.getInstance();
        c.setTime(date);
        // int
hour=c.get(Calendar.DAY_OF_WEEK);
        // hour中存的就是星期几了，其范围
1~7
        // 1=星期日 7=星期六，其他类推
        return new
SimpleDateFormat("EEEE").format(c.getTime());
    }



public static Date strToDate(String strDate) {
        SimpleDateFormat
formatter = new SimpleDateFormat("yyyy-MM-dd");
        ParsePosition pos =
new ParsePosition(0);
        Date strtodate = formatter.parse(strDate,
pos);
        return strtodate;
    }


    public
static long getDays(String date1, String date2) {
        if (date1 == null
|| date1.equals(""))
            return 0;
        if (date2 == null ||
date2.equals(""))
            return 0;
        // 转换为标准时间

SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");

java.util.Date date = null;
        java.util.Date mydate =
null;
        try {
            date =
myFormatter.parse(date1);
            mydate =
myFormatter.parse(date2);
        } catch (Exception e) {

}
        long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        return day;
    }


    public String
getDefaultDay() {
        String str = "";
        SimpleDateFormat sdf
= new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//
设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);//
加一个月，变为下月的1号
        lastDate.add(Calendar.DATE, -1);//
减去一天，变为当月最后一天

        str =
sdf.format(lastDate.getTime());
        return str;

}


    public String getPreviousMonthFirst() {

String str = "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//
设为当前月的1号
        lastDate.add(Calendar.MONTH, -1);//
减一个月，变为下月的1号
        //
lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天

        str =
sdf.format(lastDate.getTime());
        return str;

}


    public String getFirstDayOfMonth() {
        String
str = "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//
设为当前月的1号
        str = sdf.format(lastDate.getTime());
        return
str;
    }


    public String getCurrentWeekday()
{
        weeks = 0;
        int mondayPlus =
this.getMondayPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
mondayPlus + 6);
        Date monday =
currentDate.getTime();

        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getNowTime(String dateformat) {
        Date now = new
Date();
        SimpleDateFormat dateFormat = new
SimpleDateFormat(dateformat);// 可以方便地修改日期格式
        String hehe =
dateFormat.format(now);
        return hehe;
    }

private int getMondayPlus() {
        Calendar cd =
Calendar.getInstance();
        //
获得今天是一周的第几天，星期日是第一天，星期二是第二天......
        int dayOfWeek =
cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1
        if
(dayOfWeek == 1) {
            return 0;
        } else
{
            return 1 - dayOfWeek;
        }

}


    public String getMondayOFWeek() {
        weeks =
0;
        int mondayPlus = this.getMondayPlus();

GregorianCalendar currentDate = new GregorianCalendar();

currentDate.add(GregorianCalendar.DATE, mondayPlus);
        Date monday =
currentDate.getTime();

        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getSaturday() {
        int mondayPlus =
this.getMondayPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
mondayPlus + 7 * weeks + 6);
        Date monday =
currentDate.getTime();
        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getPreviousWeekSunday() {
        weeks = 0;

weeks--;
        int mondayPlus = this.getMondayPlus();

GregorianCalendar currentDate = new GregorianCalendar();

currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
        Date
monday = currentDate.getTime();
        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getPreviousWeekday() {
        weeks--;
        int
mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate =
new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
mondayPlus + 7 * weeks);
        Date monday =
currentDate.getTime();
        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getNextMonday() {
        weeks++;
        int mondayPlus
= this.getMondayPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
mondayPlus + 7);
        Date monday = currentDate.getTime();

DateFormat df = DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }



public String getNextSunday() {

        int mondayPlus =
this.getMondayPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
mondayPlus + 7 + 6);
        Date monday =
currentDate.getTime();
        DateFormat df =
DateFormat.getDateInstance();
        String preMonday =
df.format(monday);
        return preMonday;
    }

    private
int getMonthPlus() {
        Calendar cd =
Calendar.getInstance();
        int monthOfNumber =
cd.get(Calendar.DAY_OF_MONTH);
        cd.set(Calendar.DATE, 1);//
把日期设置为当月第一天
        cd.roll(Calendar.DATE, -1);//
日期回滚一天，也就是最后一天
        MaxDate = cd.get(Calendar.DATE);
        if
(monthOfNumber == 1) {
            return -MaxDate;
        } else
{
            return 1 - monthOfNumber;
        }

}


    public String getPreviousMonthEnd() {
        String
str = "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.add(Calendar.MONTH, -1);//
减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天

lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
        str =
sdf.format(lastDate.getTime());
        return str;

}


    public String getNextMonthFirst() {
        String
str = "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);//
减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        str
= sdf.format(lastDate.getTime());
        return str;

}


    public String getNextMonthEnd() {
        String str
= "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);//
加一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天

lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
        str =
sdf.format(lastDate.getTime());
        return str;

}


    public String getNextYearEnd() {
        String str
= "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);//
加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);

lastDate.roll(Calendar.DAY_OF_YEAR, -1);
        str =
sdf.format(lastDate.getTime());
        return str;

}


    public String getNextYearFirst() {
        String
str = "";
        SimpleDateFormat sdf = new
SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate =
Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);//
加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        str =
sdf.format(lastDate.getTime());
        return str;


}


    private int getMaxYear() {
        Calendar cd =
Calendar.getInstance();
        cd.set(Calendar.DAY_OF_YEAR, 1);//
把日期设为当年第一天
        cd.roll(Calendar.DAY_OF_YEAR, -1);//
把日期回滚一天。
        int MaxYear = cd.get(Calendar.DAY_OF_YEAR);

return MaxYear;
    }

    private int getYearPlus() {

Calendar cd = Calendar.getInstance();
        int yearOfNumber =
cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天

cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天

cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
        int MaxYear =
cd.get(Calendar.DAY_OF_YEAR);
        if (yearOfNumber == 1)
{
            return -MaxYear;
        } else {
            return 1
- yearOfNumber;
        }
    }


    public String
getCurrentYearFirst() {
        int yearPlus =
this.getYearPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
yearPlus);
        Date yearDay = currentDate.getTime();

DateFormat df = DateFormat.getDateInstance();
        String preYearDay =
df.format(yearDay);
        return preYearDay;
    }

    //
获得本年最后一天的日期 *
    public String getCurrentYearEnd() {
        Date date
= new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years =
dateFormat.format(date);
        return years + "-12-31";

}

    // 获得上年第一天的日期 *
    public String getPreviousYearFirst()
{
        Date date = new Date();
        SimpleDateFormat dateFormat =
new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years =
dateFormat.format(date);
        int years_value =
Integer.parseInt(years);
        years_value--;
        return
years_value + "-1-1";
    }

    // 获得上年最后一天的日期
    public
String getPreviousYearEnd() {
        weeks--;
        int yearPlus =
this.getYearPlus();
        GregorianCalendar currentDate = new
GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE,
yearPlus + MaxYear * weeks
                + (MaxYear - 1));

Date yearDay = currentDate.getTime();
        DateFormat df =
DateFormat.getDateInstance();
        String preYearDay =
df.format(yearDay);
        return preYearDay;

}


    public String getThisSeasonFirstTime(int month)
{
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11,
12 } };
        int season = 1;
        if (month >= 1 &&
month <= 3) {
            season = 1;
        }
        if (month
>= 4 && month <= 6) {
            season = 2;

}
        if (month >= 7 && month <= 9) {

season = 3;
        }
        if (month >= 10 && month <=
12) {
            season = 4;
        }
        int start_month =
array[season - 1][0];
        int end_month = array[season -
1][2];

        Date date = new Date();
        SimpleDateFormat
dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String
years = dateFormat.format(date);
        int years_value =
Integer.parseInt(years);

        int start_days = 1;//
years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);

int end_days = getLastDayOfMonth(years_value, end_month);
        String
seasonDate = years_value + "-" + start_month + "-" + start_days;

return seasonDate;

    }


    public String
getThisSeasonFinallyTime(int month) {
        int array[][] = { { 1, 2, 3 },
{ 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season =
1;
        if (month >= 1 && month <= 3) {

season = 1;
        }
        if (month >= 4 && month <=
6) {
            season = 2;
        }
        if (month >= 7
&& month <= 9) {
            season = 3;

}
        if (month >= 10 && month <= 12) {

season = 4;
        }
        int start_month = array[season -
1][0];
        int end_month = array[season - 1][2];

        Date
date = new Date();
        SimpleDateFormat dateFormat = new
SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years =
dateFormat.format(date);
        int years_value =
Integer.parseInt(years);

        int start_days = 1;//
years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);

int end_days = getLastDayOfMonth(years_value, end_month);
        String
seasonDate = years_value + "-" + end_month + "-" + end_days;
        return
seasonDate;

    }

private int getLastDayOfMonth(int year, int month) {
        if (month == 1
|| month == 3 || month == 5 || month == 7 || month == 8
                ||
month == 10 || month == 12) {
            return 31;

}
        if (month == 4 || month == 6 || month == 9 || month == 11)
{
            return 30;
        }
        if (month == 2)
{
            if (isLeapYear(year)) {
                return
29;
            } else {
                return 28;

}
        }
        return 0;
    }


    public
boolean isLeapYear(int year) {
        return (year % 4 == 0 && year
% 100 != 0) || (year % 400 == 0);
    }


    public boolean
isLeapYear2(int year) {
        return new
GregorianCalendar().isLeapYear(year);
    }
}

查看全文

相关阅读:
Stm32设置串口300波特率
 STM32F103ZET6移植FreeRTOS过程
 什么时候该用裸机？什么时候该用RTOS？
又到了立flag时间
 关于掉电数据保存的心得
 一个教训
 下个月回国给自己定目标
 GPRS模块/4G开发过程
 ftp登陆失败，check pass; user unknown
python深浅拷贝

原文地址：https://www.cnblogs.com/liuguanghai/p/4059580.html