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java.text.SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());//先取得今天的日历日时间Calendar calendar = new GregorianCalendar();calendar.setTime(new Date());//转换得到今天的日期String today = sdf.format(calendar.getTime());//转换得倒明天的日期calendar.add(calendar.DATE, +1);String tomorrow = sdf.format(calendar.getTime());//转换得倒昨天的日期calendar.add(calendar.DATE, -1);String yesterday= sdf.format(calendar.getTime());