Java获取各种常用时间方法大全
- package cc.javaweb.test;
- Java中文网,Java获取各种时间大全
- 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 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("获取两个日期之间间隔天数2010-12-31~2010-9-14:"+TimeTest.getTwoDay("2010-12-31","2010-9-14"));
- }
- /**
- * 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");
- ;
- try {
- java.util.Date date = myFormatter.parse(sj1);
- java.util.Date mydate = myFormatter.parse(sj2);
- );
- } 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");
- );
- 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(""))
- ;
- if (date2 == null || date2.equals(""))
- ;
- // 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) {
- }
- );
- 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();
- );//设为当前月的1号
- );//加一个月,变为下月的1号
- );//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();
- );//设为当前月的1号
- );//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();
- );//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() {
- ;
- int mondayPlus = this.getMondayPlus();
- GregorianCalendar currentDate = new GregorianCalendar();
- );
- 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......
- ; //因为按中国礼拜一作为第一天所以这里减1
- ) {
- ;
- } else {
- - dayOfWeek;
- }
- }
- //获得本周一的日期
- public String getMondayOFWeek(){
- ;
- 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();
- );
- 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--;
- 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();
- * 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();
- );
- 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();
- );
- 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);
- );//把日期设置为当月第一天
- );//日期回滚一天,也就是最后一天
- MaxDate=cd.get(Calendar.DATE);
- ){
- return -MaxDate;
- }else{
- -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();
- );//减一个月
- );//把日期设置为当月第一天
- );//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();
- );//减一个月
- );//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();
- );//加一个月
- );//把日期设置为当月第一天
- );//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();
- );//加一个年
- );
- );
- 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();
- );//加一个年
- );
- str=sdf.format(lastDate.getTime());
- return str;
- }
- //获得本年有多少天
- private int getMaxYear(){
- Calendar cd = Calendar.getInstance();
- );//把日期设为当年第一天
- );//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
- );//把日期设为当年第一天
- );//把日期回滚一天。
- int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
- ){
- return -MaxYear;
- }else{
- -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();
- ));
- Date yearDay = currentDate.getTime();
- DateFormat df = DateFormat.getDateInstance();
- String preYearDay = df.format(yearDay);
- );
- return preYearDay;
- }
- //获得本季度
- public String getThisSeasonTime(int month){
- }};
- ;
- ){
- ;
- }
- ){
- ;
- }
- ){
- ;
- }
- ){
- ;
- }
- ];
- ];
- 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+"-"+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 (isLeapYear(year)) {
- ;
- } else {
- ;
- }
- }
- ;
- }
- /**
- * 是否闰年
- * @param year 年
- * @return
- */
- public boolean isLeapYear(int year) {
- );
- }