因为项目中有这个需求，根据日期得出具体的天数，也可以是星期几，z这里因为不需要星期几，所以就没写天数。
以下是代码：
/*** 通过给定的日期,来判断是及今天,明天,后天,还是大后天,以及不支持的格式*/public class DateFormatUtil {private static final String TAG = "DateFormatUtil";private Context mContext;private final String todayStr;private final String tomorrowStr;private final String afterTomorrowStr;private final String threeeDaysAfterNow;private final String sorry;public DateFormatUtil(Context context) {this.mContext = context;todayStr = mContext.getResources().getString(R.string.weather_today);tomorrowStr = mContext.getResources().getString(R.string.weather_tomorrow);afterTomorrowStr = mContext.getResources().getString(R.string.weather_after_tomorrow);threeeDaysAfterNow = mContext.getResources().getString(R.string.weather_three_days_after_now);sorry = mContext.getResources().getString(R.string.weather_sorry);}/*** 将传入的日期字符串转换为今天,明天,后天,大后天** @param date* @return*/public String getDateDetail(String date) {Calendar today = Calendar.getInstance();Calendar target = Calendar.getInstance();DateFormat df = new SimpleDateFormat("yyyy-MM-dd");try {today.setTime(df.parse(getNowDateToStr()));today.set(Calendar.HOUR, 0);today.set(Calendar.MINUTE, 0);today.set(Calendar.SECOND, 0);target.setTime(df.parse(date));target.set(Calendar.HOUR, 0);target.set(Calendar.MINUTE, 0);target.set(Calendar.SECOND, 0);} catch (ParseException e) {e.printStackTrace();return null;}long intervalMilli = target.getTimeInMillis() - today.getTimeInMillis();int xcts = (int) (intervalMilli / (24 * 60 * 60 * 1000));LogUtils.logDebug(DateFormatUtil.class, "-------->" + xcts);String s = showDateDetail(xcts, target);LogUtils.logDebug(DateFormatUtil.class, "-------->" + s);return s;}/*** 将日期差显示为日期** @param xcts* @param target* @return*/private String showDateDetail(int xcts, Calendar target) {switch (xcts) {case 0:return todayStr;case 1:return tomorrowStr;case 2:return afterTomorrowStr;case 3:return threeeDaysAfterNow;default:return sorry;}}private String getNowDateToStr() {Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");String nowDateStr = sdf.format(date);//将当前时间格式化为需要的类型return nowDateStr;}}记录下来，供自己以后学习所用。
如果觉得《把年月日转换为今天 明天 后天 大后天》对你有帮助，请点赞、收藏，并留下你的观点哦！
