java获取当前月和周的第一天和最后一天

冷不防 2022-01-06 03:43 936阅读 0赞

获取当前周的第一天：

  1. public static Date getFirstDayOfWeek(Date date) {
  2.     Calendar cal = Calendar.getInstance();
  3.     try {
  4.         cal.setTime(date);
  5.         cal.set(Calendar.DAY_OF_WEEK, 2);
  6.     } catch (Exception e) {
  7.         e.printStackTrace();
  8.     }
  10.     return cal.getTime();
  11. }

获取当前周最后一天：

  1. public static Date getLastDayOfWeek(Date date) {
  2.     Calendar cal = Calendar.getInstance();
  4.     try {
  5.         cal.setTime(date);
  6.         cal.set(Calendar.DAY_OF_WEEK, 2);
  7.         cal.set(Calendar.DATE, cal.get(Calendar.DATE) + 6);
  8.     } catch(Exception e) {
  9.         e.printStackTrace();
  10.     }
  12.     return cal.getTime();
  13. }

获取当前月第一天：

  1. public static String getCurrentMonthFirstDay() {
  2.         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");  
  3.         Calendar cale = Calendar.getInstance();  
  4.         cale = Calendar.getInstance();  
  5.         cale.add(Calendar.MONTH, 0);  
  6.         cale.set(Calendar.DAY_OF_MONTH, 1);  
  7.         return format.format(cale.getTime());
  8.     }

获取当前月最后一天：

  1. public static String getCurrentMonthLastDay() {
  2.         SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");  
  3.         Calendar cale = Calendar.getInstance();  
  4.         cale = Calendar.getInstance();  
  5.         cale.add(Calendar.MONTH, 1);  
  6.         cale.set(Calendar.DAY_OF_MONTH, 0);  
  7.         return format.format(cale.getTime());
  8.     }

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