Android Calendar的运用


<pre class="java" name="code">package com.iwode.common;

import java.text.DateFormat;

import java.text.ParsePosition;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.GregorianCalendar;

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);

}

}

</pre>