备份2018年海尔创客汇项目上用到的一些日期和时间处理的工具函数，以备不时之需。
直接贴代码
package com.hczt.haier.common.utils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
/**
* 精诚所至，金石为开。
* 石の上にも三年;陽気の発する所金石亦透る。
*
* @Author mahaiqiang
* @Create 2021/4/17 10:29 下午
* @Desc TODO
**/
public class DateUtil extends DateUtils {
/**
* yyyy-MM-dd
*/
public final static String DATE_FORMAT = "yyyy-MM-dd";
/**
* yyyy年MM月dd日
*/
public final static String DATE_FORMAT_CN = "yyyy年MM月dd日";
/**
* yyyy-MM-dd HH:mm:ss
*/
public final static String TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
/**
* yyyy-MM-dd HH:mm
*/
public final static String TIME_FORMAT_MINUTE = "yyyy-MM-dd HH:mm";
/**
* yyyy年MM月dd日 HH:mm:ss
*/
public final static String TIME_FORMAT_CN = "yyyy年MM月dd日 HH:mm:ss";
/**
* yyyy-MM
*/
public final static String MONTH_FORMAT = "yyyy-MM";
/**
* yyyyMMdd
*/
public final static String DAY_FORMAT = "yyyyMMdd";
/**
* yyyyMMddHHmmss
*/
public final static String TIME_FORMAT_FOR_NAME = "yyyyMMddHHmmss";
/**
* yyMMddHHmmss
*/
public final static String TIME_FORMAT_FOR_SHORT = "yyMMddHHmmss";
/**
* yyyyMMddHHmmss
*/
public final static String TIME_FORMAT_TIME = "yyyyMMddHHmmss";
public static final long millisOfDay = 86400000L;
public static Date formateData(Date date, String format) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.parse(date2str(date, format));
}
public static Date str2date(String dateStr, String format) throws ParseException {
if (StringUtils.isEmpty(dateStr)) {
return null;
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.parse(dateStr);
}
public static String date2str(Date date, String format) {
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(date);
}
/**
* date format yyyy-MM-dd
*
* @param date
* @return
*/
public static String dateToSimpleDateFormat(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
return sdf.format(date);
}
public static Date addDate(Date date, int addDay) {
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DAY_OF_YEAR, addDay);
return c.getTime();
}
public static Date getOffsetDate(Date now, int field, int offset) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(now);
calendar.add(field, offset);
return calendar.getTime();
}
public static Date dayStartTime(Date date) throws ParseException {
String dateStr = date2str(date, DATE_FORMAT);
return str2date(dateStr, DATE_FORMAT);
}
/**
* 获取某一天的最后一秒
*
* @param date
* @return
* @throws Exception
*/
public static Date dayEndTime(Date date) throws ParseException {
String dateStr = date2str(date, DATE_FORMAT);
return str2date(dateStr + " 23:59:59", TIME_FORMAT);
}
/**
* start
* 本周开始时间戳 - 以星期一为本周的第一天
*/
public static Date getThisMonday(Date date) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
int day_of_week = cal.get(Calendar.DAY_OF_WEEK) - 1;
if (day_of_week == 0) {
day_of_week = 7;
}
cal.add(Calendar.DATE, -day_of_week + 1);
return cal.getTime();
}
/**
* 获取某时间段内所有的日期
*
* @return
*/
public static List<Date> findDatesBetweenTwoDate(Date beginDate, Date endDate) throws ParseException {
List<Date> dates = new LinkedList<>();
if (!beginDate.after(endDate)) {
beginDate = DateUtil.formateData(beginDate, DATE_FORMAT);
endDate = DateUtil.formateData(endDate, DATE_FORMAT);
dates.add(beginDate);
Calendar calBegin = Calendar.getInstance();
calBegin.setTime(beginDate);
Calendar calEnd = Calendar.getInstance();
calEnd.setTime(endDate);
while (endDate.after(calBegin.getTime())) {
calBegin.add(Calendar.DAY_OF_MONTH, 1);
dates.add(calBegin.getTime());
}
}
return dates;
}
/**
* 获取某日期的前后的日期
*
* @param date 指定的日期
* @param interval 间隔的时间 正为之后的日期，负为之前的日期
* @param calendarUnit 间隔单位
* @return
*/
public static Date intervalOfDate(Date date, Integer interval, Integer calendarUnit) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(calendarUnit, calendar.get(calendarUnit) + interval);
return calendar.getTime();
}
/**
* 判断时间是不是今天
* @param date
* @return 是返回true，不是返回false
*/
public static boolean isToday(Date date) {
//当前时间
Date now = new Date();
SimpleDateFormat sf = new SimpleDateFormat("yyyyMMdd");
//获取今天的日期
String nowDay = sf.format(now);
//对比的时间
String day = sf.format(date);
return day.equals(nowDay);
}
public static String formatDateTime(String startTime, String endTime) {
String startDate = startTime.substring(0, 10);
String endDate = endTime.substring(0, 10);
String beginTime = startTime.substring(11, 19);
String overTime = endTime.substring(11, 19);
if (startDate.equals(endDate)) {
return startDate + " " + beginTime + " ~ " + overTime;
} else {
return startDate + " " + beginTime + " ~ " + endDate + " " + overTime;
}
}
public static void main(String[] args) {
Date date = DateUtil.intervalOfDate(new Date(), -30, Calendar.MINUTE);
System.out.println(DateUtil.date2str(date, DateUtil.TIME_FORMAT));
}
/**
* 获取每天的开始时间 00:00:00:00
*
* @param date
* @return
*/
public static Date getStartTime(Date date) {
Calendar dateStart = Calendar.getInstance();
dateStart.setTime(date);
dateStart.set(Calendar.HOUR_OF_DAY, 0);
dateStart.set(Calendar.MINUTE, 0);
dateStart.set(Calendar.SECOND, 0);
return dateStart.getTime();
}
/**
* 获取每天的开始时间 23:59:59:999
*
* @param date
* @return
*/
public static Date getEndTime(Date date) {
Calendar dateEnd = Calendar.getInstance();
dateEnd.setTime(date);
dateEnd.set(Calendar.HOUR_OF_DAY, 23);
dateEnd.set(Calendar.MINUTE, 59);
dateEnd.set(Calendar.SECOND, 59);
return dateEnd.getTime();
}
/**
* 获取两个日期相隔天数
*
*/
public static Long daysBetweenDates(Date date1, Date date2) {
long tmp1 = date1.getTime();
long tmp2 = date2.getTime();
return (tmp2 - tmp1) / millisOfDay;
}
}
网友评论