java获取时间戳（计算两个时间相差几天几小时几秒 获取当前日期是周几。。。）

java时间相关

博主所有博客都是验证过的

获取一个时间的时间戳

//获取当前时间戳Calendar cal1 = Calendar.getInstance();cal1.setTime(new Date());long timestamp1 = cal1.getTimeInMillis();

计算两个时间相差几天几小时几秒

//计算两个时间相差几天几小时几秒public static String getTimeDiff(String date) {if (ObjectUtils.isEmpty(date)) {return "";}StringBuilder sb = new StringBuilder();try {SimpleDateFormat mDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date parse = mDateFormat.parse(date);Date now = new Date();// 这样得到的差值是微秒级别long diff = parse.getTime() - now.getTime();// 只能精确到日 无法具细到年 月 不能确定一个月具体多少天 不能确定一年具体多少天// 获取日long day = diff / (1000 * 60 * 60 * 24);diff = diff % (1000 * 60 * 60 * 24);if (day > 0) {sb.append(day).append("天");}// 获取时long hour = diff / (1000 * 60 * 60);diff = diff % (1000 * 60 * 60);if (hour > 0) {sb.append(hour).append("时");}// 获取分long min = diff / (1000 * 60);diff = diff % (1000 * 60);if (min > 0) {sb.append(min).append("分");}// 获取秒long sec = diff / 1000;if (sec > 0) {sb.append(sec).append("秒");}return sb.toString();} catch (ParseException e) {return "";}}

获取一个日期是周几

//获取当前时间是周几private static int getWeek() {Integer week =0;Date today = new Date();Calendar c = Calendar.getInstance();c.setTime(today);//当前设置的是系统时间，你可以自定义时间int weekday = c.get(Calendar.DAY_OF_WEEK);if (weekday == 1) {week = 7;} else if (weekday == 2) {week = 1;} else if (weekday == 3) {week = 2;} else if (weekday == 4) {week = 3;} else if (weekday == 5) {week = 4;} else if (weekday == 6) {week = 5;} else if (weekday == 7) {week = 6;}return week;}

获取当前时间的周五的时间

//获取当前日期的周五的时间private static Date getDateByType1(Date date) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);// 获得当前日期是一个星期的第几天int dayOfWeek = Calendar.DAY_OF_WEEK;System.out.println(dayOfWeek);int dayWeek = calendar.get(Calendar.DAY_OF_WEEK);if (1 == dayWeek) {calendar.add(Calendar.DAY_OF_MONTH, -1);}// 设置一个星期的第一天，按中国的习惯一个星期的第一天是星期一calendar.setFirstDayOfWeek(Calendar.MONDAY);// 获得当前日期是一个星期的第几天int day = calendar.get(Calendar.DAY_OF_WEEK);int first = calendar.getFirstDayOfWeek();// 计算周五的日期calendar.add(Calendar.DAY_OF_WEEK, first - day + 4);return calendar.getTime();}

如果觉得《java获取时间戳（计算两个时间相差几天几小时几秒 获取当前日期是周几。。。）》对你有帮助，请点赞、收藏，并留下你的观点哦！