百度获取节日api：https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv/api.php 参数：query:****年**月 resource_id:6018
只能获取当前年及之前的日期
接口层级：

Image_20201103103827.jpg

代码的逻辑是先获取指定年份的所有周六、日的日期放入set<>中，再循环每个月调用百度api获取节假日日期，如果是放假则加到set中，如果要补班则删除set的日期
具体代码如下：
一、新建实体类 HolidayDTO.class

@Data
public class HolidayDTO {
    private String desc;
    private String festival;
    private String name;
    private String rest;
    private List<HoliDTO> list;
}

HoliDTO.class

@Data
public class HoliDTO {
    private String date;
    private Integer status;
}

二、新建工具类DateUtils.class获取周六日

public class DateUtils{
    public static Set<String> getSunDayAndStaurday(String year1){
        int year = Integer.parseInt(year1);
        Calendar calendar = new GregorianCalendar(year, Calendar.JANUARY, 1);
        int i = 1;
        Set<String> dates=new HashSet<>();
        while (calendar.get(Calendar.YEAR) < year + 1) {
            calendar.set(Calendar.WEEK_OF_YEAR, i++);
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
            if (calendar.get(Calendar.YEAR) == year) {
                dates.add(dateFormatYMD(calendar.getTime()));

            }
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
            if (calendar.get(Calendar.YEAR) == year) {
                dates.add(dateFormatYMD(calendar.getTime()));
            }
        }
        return dates;
    }
}

三、生产节假日与周六日

public void getHoliday(String year) {
        //获取一年的周六、日的日期
        Set<String> holidayDate = DateUtils.getSunDayAndStaurday(year);
        //循环调用百度api
        for (int i = 1; i <= 12; i++) {
            Map<String, String> parms = new HashMap<>();
            parms.put("query", year + "年" + i + "月");
            parms.put("resource_id", "6018");
            String url = "https://sp0.baidu.com/8aQDcjqpAAV3otqbppnN2DJv/api.php";
            String re = HttpClientUtils.getGetResult(url, parms, null);
            //根据层级处理数据
            JSONObject a = JSONObject.parseObject(re);
            JSONArray b = a.getJSONArray("data");
            JSONObject c = b.getJSONObject(0);
            String d = c.getString("holiday");
            List<HolidayDTO> holidayDTOList = new ArrayList<>();
            if (StringUtils.isNotBlank(d)) {
                //假如某个月没有节假日就不是数组
                if (d.indexOf("[") == 0) {
                    holidayDTOList = JSONArray.parseArray(d, HolidayDTO.class);
                } else {
                    HolidayDTO holidayDTO1 = JSONObject.parseObject(d, HolidayDTO.class);
                    holidayDTOList.add(holidayDTO1);
                }
            }
            for (HolidayDTO holidayDTO : holidayDTOList) {
                for (HoliDTO v : holidayDTO.getList()) {
                    if (v.getDate().contains(year)) {
                        //节假日放假增加到set
                        if (v.getStatus() == 1) {
                            holidayDate.add(DateUtils.dateFormatYMD(DateUtils.YMDDormatDate(v.getDate())));
                        }
                        //节假日补班则删除对应的日期
                        if (v.getStatus() == 2) {
                            if(holidayDate.contains(DateUtils.dateFormatYMD(DateUtils.YMDDormatDate(v.getDate())))) {
                                holidayDate.remove(DateUtils.dateFormatYMD(DateUtils.YMDDormatDate(v.getDate())));
                            }
                        }
                    }
                }
            }

        }
        //可以保存到数据库或者做其他作用
        for (String v1 : holidayDate) {
            HolidayDO holidayDO = new HolidayDO();
            holidayDO.setDay(DateUtils.YMDDormatDate(v1));
                holidayMapper.insert(holidayDO);
        }
    }