package com.xxx.xxx.xxx;
import java.sql.Timestamp;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
public class DateUtil {
/**
* 获取当天开始时间
*/
public static Date getStartDay() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
* 获取当天结束时间
*/
public static Date getEndDay() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
*
* 获取第二天凌晨零点时间
* @return
*/
public static Date getNextDayStart() {
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
* 获取本周的第一天
* @return String
**/
public static Date getWeekStart() {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
return calendar.getTime();
}
/**
* 获取本周的最后一天
* @return String
**/
public static Date getWeekEnd() {
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
return calendar.getTime();
}
/**
*
* 获取下周开始时间
* @return
*/
public static Date getNextWeekStart() {
Calendar cal = Calendar.getInstance();
cal.setTime(getWeekStart());
cal.add(Calendar.DATE, 7);
return cal.getTime();
}
/**
* 获取当月开始时间
*/
public static Date getStartMonth() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
* 获取当月结束时间
*/
public static Date getEndMonth() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
* 获取下个月开始时间
*/
public static Date getNextMonthStart() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(getStartMonth());
calendar.add(Calendar.MONTH, 1);
return calendar.getTime();
}
/**
* 获取某个date的年份
* @param date
* @return
*/
public static int getYear(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.YEAR);
}
/**
* 获取某个date的月份
* @param date
* @return
*/
public static int getMonth(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.MONTH) + 1;
}
/**
* 获取某个date的day
* @param date
* @return
*/
public static int getDay(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.DAY_OF_MONTH);
}
/**
* 获取两个时间的时间差
* @param before
* @param after
* @param flag 0:秒,1:分,2:时,3:天
* @return
*/
public static int getDiffNum(Date before, Date after, int flag) {
if (before == null || after == null) {
return 0;
}
long timeInterval = after.getTime() - before.getTime();
switch (flag) {
case 0:// 秒
return (int) ((timeInterval / 1000));
case 1:// 分
return (int) ((timeInterval / (60 * 1000)));
case 2:// 时
return (int) (timeInterval / (60 * 60 * 1000));
case 3:// 天
return (int) (timeInterval / (60 * 60 * 1000 * 24));
}
return 0;
}
/**
* 获取从当前日期指定分钟以前的日期
* @return
*/
public static Date getDateBeforeMinute(int beforeMinute) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
int minute = calendar.get(Calendar.MINUTE);
calendar.set(Calendar.MINUTE, minute - beforeMinute);
return calendar.getTime();
}
java 常用的时间方法工具类
最新推荐文章于 2025-05-12 20:20:26 发布