Java获取两个日期之间的所有日期，并查出是周几

直接上代码

    /**
     * description 拆分日期
     *
     * @param startDate 开始日期
     * @param endDate 结束日期
     * @author yanzy
     * @version 1.0
     * @date 2021/6/3 13:36
     */
    private static Map dateSplit(String startDate, String endDate) throws Exception {
    
    
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        List<Date> dateList = new ArrayList();
        Date start = simpleDateFormat.parse(startDate);
        Date end = simpleDateFormat.parse(endDate);

        Long spi = end.getTime() - start.getTime();
        Long step = spi / (24 * 60 * 60 * 1000);// 相隔天数

        dateList.add(start);
        for (int i = 1; i <= step; i++) {
    
    
            // 比上一天加1
            dateList.add(new Date(dateList.get(i - 1).getTime() + (24 * 60 * 60 * 1000)));
        }

        Map<String, String> dateMap = new LinkedHashMap<>();
        for (Date date : dateList) {
    
    
            String day = simpleDateFormat.format(date);
            dateMap.put(day, weekMap.get(LocalDate.parse(day).getDayOfWeek().toString()));
        }
        return dateMap;
    }
    
    private static Map<String, String> weekMap = new HashMap<String, String>() {
    
    
        {
    
    
            put("MONDAY", "周一");
            put("TUESDAY", "周二");
            put("WEDNESDAY", "周三");
            put("THURSDAY", "周四");
            put("FRIDAY", "周五");
            put("SATURDAY", "周六");
            put("SUNDAY", "周日");
        }
    };

来测试下6月3号到6月10号之间的日期：

System.out.println(dateSplit("2021-06-03", "2021-06-10"));

{
    
    
2021-06-03 = 周四
2021-06-04 = 周五
2021-06-05 = 周六
2021-06-06 = 周日
2021-06-07 = 周一
2021-06-08 = 周二
2021-06-09 = 周三
2021-06-10 = 周四
}