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IT忍者神龟之Java获取各种常用时间方法(工具类)
Java代码
- 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);
- }
- }
IT忍者神龟之Java获取各种常用时间方法(工具类)
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