2025年android 判断指定日期是否为今天昨天

科技前沿 • 2025-03-15 18:53 • 阅读 63
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public class DataUtils { / * 判断给定字符串时间是否为今日(效率不是很高，不过也是一种方法) * @param sdate * @return boolean */ public static boolean isToday(String sdate){ boolean b = false; Date time = toDate(sdate); Date today = new Date(); if(time != null){ String nowDate = dateFormater2.get().format(today); String timeDate = dateFormater2.get().format(time); if(nowDate.equals(timeDate)){ b = true; } } return b; } / * 将字符串转位日期类型 * @param sdate * @return */ public static Date toDate(String sdate) { try { return dateFormater.get().parse(sdate); } catch (ParseException e) { return null; } } private final static ThreadLocal<SimpleDateFormat> dateFormater = new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } }; private final static ThreadLocal<SimpleDateFormat> dateFormater2 = new ThreadLocal<SimpleDateFormat>() { @Override protected SimpleDateFormat initialValue() { return new SimpleDateFormat("yyyy-MM-dd"); } }; private static ThreadLocal<SimpleDateFormat> DateLocal = new ThreadLocal<SimpleDateFormat>(); / * 判断是否为今天(效率比较高) * @param day 传入的 时间 "2016-06-28 10:10:30" "2016-06-28" 都可以 * @return true今天 false不是 * @throws ParseException */ public static boolean IsToday(String day) throws ParseException { Calendar pre = Calendar.getInstance(); Date predate = new Date(System.currentTimeMillis()); pre.setTime(predate); Calendar cal = Calendar.getInstance(); Date date = getDateFormat().parse(day); cal.setTime(date); if (cal.get(Calendar.YEAR) == (pre.get(Calendar.YEAR))) { int diffDay = cal.get(Calendar.DAY_OF_YEAR) - pre.get(Calendar.DAY_OF_YEAR); if (diffDay == 0) { return true; } } return false; } / * 判断是否为昨天(效率比较高) * @param day 传入的 时间 "2016-06-28 10:10:30" "2016-06-28" 都可以 * @return true今天 false不是 * @throws ParseException */ public static boolean IsYesterday(String day) throws ParseException { Calendar pre = Calendar.getInstance(); Date predate = new Date(System.currentTimeMillis()); pre.setTime(predate); Calendar cal = Calendar.getInstance(); Date date = getDateFormat().parse(day); cal.setTime(date); if (cal.get(Calendar.YEAR) == (pre.get(Calendar.YEAR))) { int diffDay = cal.get(Calendar.DAY_OF_YEAR) - pre.get(Calendar.DAY_OF_YEAR); if (diffDay == -1) { return true; } } return false; } public static SimpleDateFormat getDateFormat() { if (null == DateLocal.get()) { DateLocal.set(new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA)); } return DateLocal.get(); } }
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2025年android 判断指定日期是否为今天昨天

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