package org.yeshi.utils;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.List;
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public class DateUtil {
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public static String dateDiff(String startTime, String endTime) {
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String datatime = 0 + "天" + 0 + "小时" + 0 + "分钟";
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SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
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try {
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long nm = 1000 * 60;// 一分钟的毫秒数
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long nh = 1000 * 60 * 60;// 一小时的毫秒数
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long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
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// 获得两个时间的毫秒时间差异
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long diff = sd.parse(endTime).getTime() - sd.parse(startTime).getTime();
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long day = diff / nd;// 计算差多少天
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long hour = diff % nd / nh;// 计算差多少小时
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long min = diff % nd % nh / nm;// 计算差多少分钟
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datatime = day + "天" + hour + "小时" + min + "分钟";
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} catch (ParseException e) {
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e.printStackTrace();
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}
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return datatime;
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}
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public static String dateDiff2(Date startTime, Date endTime) throws Exception {
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String datatime = 0 + "天" + 0 + "小时" + 0 + "分钟";
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long nm = 1000 * 60;// 一分钟的毫秒数
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long nh = 1000 * 60 * 60;// 一小时的毫秒数
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long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
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// 获得两个时间的毫秒时间差异
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long diff = endTime.getTime() - startTime.getTime();
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long day = diff / nd;// 计算差多少天
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long hour = diff % nd / nh;// 计算差多少小时
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long min = diff % nd % nh / nm;// 计算差多少分钟
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datatime = day + "天" + hour + "小时" + min + "分钟";
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return datatime;
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}
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/**
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* 通过时间秒毫秒数判断两个时间的间隔
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*
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* @param date1
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* @param date2
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* @return
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*/
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public static int differentDaysByMillisecond(Date start, Date end) {
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return (int) ((end.getTime() - start.getTime()) / (1000 * 3600 * 24));
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}
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public String transferLongToDate(String dateFormat, Long millSec) {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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Date date = new Date(millSec);
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return sdf.format(date);
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}
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/**
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* 验证是否属于同一天
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*
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* @param date1
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* @param date2
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* @return
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*/
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public static boolean isSameDay(Date date1, Date date2) {
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if (date1 != null && date2 != null) {
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Calendar cal1 = Calendar.getInstance();
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cal1.setTime(date1);
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Calendar cal2 = Calendar.getInstance();
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cal2.setTime(date2);
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return isSameDay(cal1, cal2);
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} else {
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return false;
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}
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}
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/**
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* 验证是否属于同一天
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*
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* @param cal1
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* @param cal2
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* @return
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*/
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public static boolean isSameDay(Calendar cal1, Calendar cal2) {
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if (cal1 != null && cal2 != null) {
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return cal1.get(0) == cal2.get(0) && cal1.get(1) == cal2.get(1) && cal1.get(6) == cal2.get(6);
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} else {
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return false;
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}
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}
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/**
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* 指定日期加上天数后的日期
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*
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* @param num 增加的天数
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* @param nowDate 创建时间
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* @return
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* @throws ParseException
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*/
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public static String plusDay(int num, String nowDate) throws ParseException {
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SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
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Date currdate = format.parse(nowDate);
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Calendar ca = Calendar.getInstance();
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ca.setTime(currdate);
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ca.add(Calendar.DATE, num);
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return format.format(ca.getTime());
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}
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/**
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* 指定日期加上天数后的日期
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*
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* @param num 增加的天数
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* @param nowDate 创建时间
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* @return
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* @throws ParseException
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*/
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public static String plusDay(int num, Date currdate) throws ParseException {
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SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
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Calendar ca = Calendar.getInstance();
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ca.setTime(currdate);
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ca.add(Calendar.DATE, num);
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return format.format(ca.getTime());
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}
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/**
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* 指定日期减去天数后的日期
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*
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* @param num 减去的天数
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* @param nowDate 创建时间
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* @return
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* @throws ParseException
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*/
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public static String reduceDay(int num, String nowDate) throws ParseException {
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SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
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Date currdate = format.parse(nowDate);
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Calendar ca = Calendar.getInstance();
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ca.setTime(currdate);
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ca.add(Calendar.DATE, -num); // 日期减 如果不够减会将月变动
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return format.format(ca.getTime());
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}
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/**
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* 指定日期减去天数后的日期
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*
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* @param num 减去的天数
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* @param nowDate 创建时间
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* @return
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* @throws ParseException
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*/
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public static Date reduceDay(int num, Date date) throws ParseException {
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// 设置要获取到什么样的时间
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SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
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// 获取String类型的时间
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String date_str = format.format(date);
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Date currdate = format.parse(date_str);
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Calendar ca = Calendar.getInstance();
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ca.setTime(currdate);
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ca.add(Calendar.DATE, -num); // 日期减 如果不够减会将月变动
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return ca.getTime();
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}
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/**
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* 计算两个日期之间相差的天数
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*
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* @param smdate 较小的时间
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* @param bdate 较大的时间
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* @return 相差天数
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* @throws ParseException calendar 对日期进行时间操作 getTimeInMillis() 获取日期的毫秒显示形式
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*/
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public static int daysBetween(Date smdate, Date bdate) throws ParseException {
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Calendar cal = Calendar.getInstance();
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cal.setTime(smdate);
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long time1 = cal.getTimeInMillis();
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cal.setTime(bdate);
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long time2 = cal.getTimeInMillis();
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long between_days = (time2 - time1) / (1000 * 3600 * 24);
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return Integer.parseInt(String.valueOf(between_days));
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}
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/**
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* 字符串日期格式的计算
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*
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* @param smdate
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* @param bdate
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* @return
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* @throws ParseException
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*/
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public static int daysBetween(String smdate, String bdate) throws ParseException {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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Calendar cal = Calendar.getInstance();
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cal.setTime(sdf.parse(smdate));
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long time1 = cal.getTimeInMillis();
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cal.setTime(sdf.parse(bdate));
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long time2 = cal.getTimeInMillis();
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long between_days = (time2 - time1) / (1000 * 3600 * 24);
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return Integer.parseInt(String.valueOf(between_days));
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}
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/**
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* 返回中间日期
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*
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* @param startTime
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* @param endTime
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* @return
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* @throws Exception
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*/
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public static List<String> dayFactory(String startTime, String endTime) throws Exception {
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List<String> listDate = new ArrayList<String>();
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String plusDay = "";
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for (int i = 0; i < 1000; i++) {
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if (i == 0) {
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plusDay = startTime;
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} else {
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plusDay = DateUtil.plusDay(i, startTime);
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}
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listDate.add(plusDay);
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if (plusDay.equals(endTime)) {
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break; // 时间结束
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}
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}
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return listDate;
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}
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/**
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* 随机减去几分钟
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* @param date
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* @return
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*/
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public static Date reduceRandomMinute(Date date) {
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long rand = (long) (Math.random() * 60 * 8);
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long time = date.getTime() - rand;
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return new Date(time);
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}
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/**
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* @param args
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* @throws ParseException format() 对日期进行格式化处理 parse() 将日期设置为date类型
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*/
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public static void main(String[] args) throws ParseException {
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// TODO Auto-generated method stub
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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Date d1 = sdf.parse("2016-09-08 00:00:00");
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Date d2 = sdf.parse("2016-09-08 00:00:00");
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System.out.println(daysBetween(d1, d2));
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System.out.println(daysBetween("2016-09-08 10:10:10", "2016-09-29 00:00:00"));
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}
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}
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