Calendar类在Java中应用案例

来源：互联网发布：手机新浪微博盗号软件编辑：程序博客网时间：2024/05/16 00:30

 public static Date getNextDay(Date date) {     Calendar calendar = Calendar.getInstance();     calendar.setTime(date);     calendar.add(Calendar.DAY_OF_MONTH, -1);//+1今天的时间加一天     date = calendar.getTime();     return date; }

//查找上几月任意日期 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");     Calendar   cal_1=Calendar.getInstance();//获取当前日期     //表示上月最后一天/*   cal_1.add(Calendar.MONTH, 0);//     cal_1.set(Calendar.DAY_OF_MONTH,0);//*/       //表示上月第一天     cal_1.add(Calendar.MONTH, -1);//     cal_1.set(Calendar.DAY_OF_MONTH,1);//     String time = sdf.format(cal_1.getTime());     System.out.println("-----1------firstDay:"+time);     System.out.println("-----1------firstDay:"+cal_1.getTime());

//查找上周日     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");     Calendar cal = Calendar.getInstance();      String str = "2017-05-01";       Date d = sdf.parse(str);     cal.setTime(d);       cal.setTime(new Date());       // 获得当前日期是一个星期的第几天       int daym = cal.get(Calendar.DAY_OF_MONTH);     int dayWeek = cal.get(Calendar.DAY_OF_WEEK);       if (1 == dayWeek) {           cal.add(Calendar.DAY_OF_MONTH,0);          System.out.println("yes");     }else{           // 设置一个星期的第一天         cal.setFirstDayOfWeek(Calendar.SUNDAY);           // 根据日历的规则，给当前日期减去星期几与一个星期第一天的差值           cal.add(Calendar.DATE, cal.getFirstDayOfWeek() - dayWeek);           System.out.println("no");     }     cal.getTime();     System.out.println("周日：" + sdf.format(cal.getTime()));

阅读全文

0 0