获取一月or一周的日期集合

1、首先先获取本月日期:本月一号到本月月底——之前文章中有如何获取

2、List<String> listAllDaysByMonth=getAllDaysWeekByDate(firstDate,endDate);

3、

private List<String> getAllDaysWeekByDate(Date firstDate, Date endDate) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        List<String> lst=new ArrayList();  
        while (!firstDate.after(endDate)) {  
         lst.add(sdf.format(firstDate));  
         firstDate = getNext(firstDate);  
        }  
        return lst;  
   }  
    private static Date getNext(Date date) {  
        Calendar calendar = Calendar.getInstance();  
        calendar.setTime(date);  
        calendar.add(Calendar.DATE, 1);  
        return calendar.getTime();  
    }

4、最后获取的listAllDaysByMonth集合即为本月一月的日期集合格式是2018-08-17形式

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获取本周的集合 大同小异,以前文章中没有写过获取本周的时间,这里主要把如何获取本周时间方法写出

Map<String, String> week = week();
String first = week.get("first");
String end = week.get("end");

private Map<String,String> week()throws Exception{
		
		SimpleDateFormat fromat=new SimpleDateFormat("yyyy-MM-dd");
		    Calendar cal = Calendar.getInstance();  	      
	        int d = 0;  
	        if(cal.get(Calendar.DAY_OF_WEEK)==1){  
	            d = -6;  
	        }else{  
	            d = 2-cal.get(Calendar.DAY_OF_WEEK);  
	        }  
	        cal.add(Calendar.DAY_OF_WEEK, d);  
	        //所在周开始日期  
	        String first=fromat.format(cal.getTime());  
	        cal.add(Calendar.DAY_OF_WEEK, 6);  
	        //所在周结束日期  
	        String end=fromat.format(cal.getTime());
	        Map<String,String> map=new HashMap<String,String>();
	        map.put("first", first);
	        map.put("end", end);
	        return map;
	}

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转载自blog.csdn.net/jovi_zhao/article/details/81777155