日期 - 台部落

package com.hefeng.test;

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 TimeTest {

//用来全局控制上一周，本周，下一周的周数变化

private int weeks = 0;

private int MaxDate;//一月最大天数

private int MaxYear;//一年最大天数

/**

* @param args

public static void main(String[] args) {

TimeTest tt = new TimeTest();

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("获取本季度第一天到最后一天:"+tt.getThisSeasonTime(11));

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

}

/**

* 得到二个日期间的间隔天数

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 + "";

}

/**

* 根据一个日期，返回是星期几的字符串

* @param sdate

* @return

public static String getWeek(String sdate) {

// 再转换为时间

Date date = TimeTest.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());

}

/**

* 将短时间格式字符串转换为时间 yyyy-MM-dd

* @param strDate

* @return

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;

}

/**

* 两个时间之间的天数

* @param date1

* @param date2

* @return

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;

}

// 计算当月最后一天,返回字符串

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;

}

// 上月第一天

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;

}

//获取当月第一天

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;

}

// 获得本周星期日的日期

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;

}

//获取当天时间

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;

}

// 获得当前日期与本周日相差的天数

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;

}

//获得本周一的日期

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;

}

//获得相应周的周六的日期

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;

}

// 获得上周星期日的日期

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;

}

// 获得上周星期一的日期

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;

}

// 获得下周星期一的日期

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;

}

// 获得下周星期日的日期

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;

}

//获得上月最后一天的日期

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;

}

//获得下个月第一天的日期

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;

}

//获得下个月最后一天的日期

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;

}

//获得明年最后一天的日期

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;

}

//获得明年第一天的日期

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;

}

//获得本年有多少天

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;

}

//获得本年第一天的日期

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);

getThisSeasonTime(11);

return preYearDay;

}

//获得本季度

public String getThisSeasonTime(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+";"+years_value+"-"+end_month+"-"+end_days;

return seasonDate;

}

/**

* 获取某年某月的最后一天

* @param year 年

* @param month 月

* @return 最后一天

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;

}

/**

* 是否闰年

* @param year 年

* @return

public boolean isLeapYear(int year) {

return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);

}

日期

日期

中軟國際Java程序員筆試題

我的友情鏈接

webservice配置

刪除重複數據

Mac下配置sublime實現LaTeX

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結