java获取国家法定节假日（不依赖API）

java获取国家法定节假日, 由此可获取每月第一个工作日和最后一个工作日

（不依赖api，主要是因为API接口不可靠或计费，此工具依赖国务院发布的节假日基础信息进行解析）

本工具仅供参考学习。各类数据获取需遵守法律法规

package com.exrate;import cn.hutool.core.util.NumberUtil;import okHttp3.*;import org.apache.commons.lang3.StringUtils;import org.jsoup.Jsoup;import org.jsoup.nodes.Document;import org.jsoup.nodes.Element;import org.jsoup.select.Elements;import java.io.*;import java.time.LocalDate;import java.time.fORMat.DateTimeFormatter;import java.util.*;import java.util.concurrent.ConcurrentSkipListSet;import java.util.regex.Matcher;import java.util.regex.Pattern;public class ChinaHolidaysUtils {        private static final String HOLIDAY_NOTICES_FILE_PATH = ChinaHolidaysUtils.class.getResource("/").getPath()+"国务院发布的节假日安排的通知/";        private static final String GoV_URL = "http://sousuo.gov.cn/s.htm?t=paper&advance=false&n=10&timetype=timeqb&mintime=&maxtime=&sort=pubtime&q=%E8%8A%82%E5%81%87%E6%97%A5%E5%AE%89%E6%8E%92%E7%9A%84%E9%80%9A%E7%9F%A5";    private static Set publicHolidays = new ConcurrentSkipListSet<>();    private static Set oxenHorseDays = new ConcurrentSkipListSet<>();    public static void main(String[] args) {        try {            System.out.println(isOxenHorseDays(LocalDate.now().toString()));        } catch (IOException e) {            e.printStackTrace();        }        System.out.println("publicHolidays: " + publicHolidays);        System.out.println("oxenHorseDays: " + oxenHorseDays);    }        public static boolean isOxenHorseDays(String localDate) throws IOException {        if(oxenHorseDays.isEmpty()){            getDays(localDate, publicHolidays, oxenHorseDays);        }        return oxenHorseDays.contains(localDate);    }        public static boolean isPublicHolidays(String localDate) throws IOException {        if(publicHolidays.isEmpty()){            getDays(localDate, publicHolidays, oxenHorseDays);        }        return publicHolidays.contains(localDate);    }    private static synchronized void getDays(String localDate, Set publicHolidays, Set oxenHorseDays) throws IOException {        //获取xxx年的节假日数据        String year = null;        if(StringUtils.isEmpty(localDate)){            year = String.valueOf(LocalDate.parse(localDate).getYear());        }else{            year = String.valueOf(LocalDate.now().getYear());        }        //先通过缓存文件，否则使用http获取        String html = getHtmlByCacheFiles(year);        if(html == null){            html = getHtmlByHttp(year);        }        Document doc = Jsoup.parse(html);        Element content = doc.select("div.b12c.pages_content").first();        Elements paragraphs = content.select("p");        for (Element p : paragraphs) {            String text = p.text();            if (text.contains("、") && text.contains("：") && text.contains("。") && text.contains("放假")) {                text = text.substring(text.indexOf("：")+1);                String[] sentences = text.split("。");                for (String sentence : sentences) {                    if (sentence.contains("放假")) {                        String t = sentence.split("放假")[0];                        if (t.contains("至")) {String start = t.split("至")[0];String startDay=null, startMonth=null, startYear=null;if(start.contains("日") || start.contains("月") || start.contains("年")){    startDay = getDigit(start, "日");    startMonth = getDigit(start, "月");    startYear = getDigit(start, "年");}LocalDate startDate = parseDate(startYear==null?year:startYear, startMonth, startDay);String end = t.split("至")[1];String endDay=null, endMonth=null, endYear=null;if(end.contains("日") || end.contains("月") || end.contains("年")){    endDay = getDigit(end, "日");    endMonth = getDigit(end, "月");    endYear = getDigit(end, "年");}LocalDate endDate = parseDate(endYear==null?(startYear==null?year:startYear):endYear, endMonth==null?startMonth:endMonth, endDay);for (LocalDate date = startDate; !date.isAfter(endDate); date = date.plusDays(1)) {    publicHolidays.add(date.toString());}                        } else {String tDay=null, tMonth=null, tYear=null;if(t.contains("日") || t.contains("月") || t.contains("年")){    tDay = getDigit(t, "日");    tMonth = getDigit(t, "月");    tYear = getDigit(t, "年");}LocalDate date = parseDate(tYear==null? year:tYear, tMonth, tDay);publicHolidays.add(date.toString());                        }                    }                    if (sentence.contains("上班")) {                        if (sentence.contains("、")) {String[] dates = sentence.split("、");for (String dateStr : dates) {    String tDay=null, tMonth=null, tYear=null;    if(dateStr.contains("日") || dateStr.contains("月") || dateStr.contains("年")){        tDay = getDigit(dateStr, "日");        tMonth = getDigit(dateStr, "月");        tYear = getDigit(dateStr, "年");    }    LocalDate date = parseDate(tYear==null? year:tYear, tMonth, tDay);    oxenHorseDays.add(date.toString());}                        }                    }                }            }        }    }        private static Request getRequestSetUnifiedHead(String url){        Request.Builder builder = new Request.Builder();        builder.header("User-Agent", "Mozilla/5.0 (windows NT 10.0; Win64; x64) AppleWEBKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36")               .header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*    private static String httpGet(OkHttpClient client, String url) throws IOException {        Request request = getRequestSetUnifiedHead(url);        Response response = client.newCall(request).execute();        if (!response.isSuccessful()) {            throw new IOException("获取数据失败：" + url);        }        String html = response.body().string();        System.out.println("进行了一次http get请求：" + url);        return html;    }        private static String getHtmlByHttp(String year) throws IOException {        OkHttpClient client = new OkHttpClient();        String html = httpGet(client, GOV_URL);        Document doc = Jsoup.parse(html);        Elements resList = doc.select("li.res-list");        if (!resList.isEmpty()) {            Optional optional = resList.stream().filter(res -> res.text().contains("国务院办公厅关于"+year+"年")).findFirst();            if (!optional.isPresent()) {                throw new IOException("未获取到"+ year +"年节假日安排的通知：" + GOV_URL);            }            Element element = optional.get();            String linkUrl = element.select("a[href]").attr("abs:href");            html = httpGet(client, linkUrl);            str2File(html, HOLIDAY_NOTICES_FILE_PATH, year+"节假日安排的通知-源数据", ".html");            Document resDoc = Jsoup.parse(html);            str2File(html, HOLIDAY_NOTICES_FILE_PATH, resDoc.title(), ".html");            return html;        }        return null;    }        private static String getHtmlByCacheFiles(String year) {        String[] paths = new File(HOLIDAY_NOTICES_FILE_PATH).list();        if(paths != null && paths.length > 0){            Optional yearPath = Arrays.stream(paths).filter(p -> p.contains(year)).findFirst();            if (yearPath.isPresent()){                return file2Str(HOLIDAY_NOTICES_FILE_PATH + yearPath.get());            }        }        return null;    }        private static LocalDate parseDate(String year, String month, String day) {        String dateStr = year + "-" + month + "-" + day;        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-M-d");        return LocalDate.parse(dateStr, formatter);    }        public static void str2File(String str, String filePath, String fileName, String fileSuffix) throws IOException {        File file = new File(filePath + fileName + fileSuffix);        if (!file.getParentFile().exists()) {            boolean created = file.getParentFile().mkdirs();            if (!created) {                throw new IOException("文件路径创建失败");            }        }        try (FileWriter writer = new FileWriter(file)) {            writer.write(str);        } catch (IOException e) {            e.printStackTrace();        }    }        private static String file2Str(String filePath) {        File file = new File(filePath);        try (FileReader reader = new FileReader(file)) {            char[] buffer = new char[(int) file.length()];            reader.read(buffer);            return new String(buffer);        } catch (IOException e) {            e.printStackTrace();        }        return null;    }        private static final Pattern PATTERN = Pattern.compile("[^\\d]");    private static String getDigit(String content, String targetStr) {        if(!content.contains(targetStr)){            return null;        }        content = content.substring(0, content.indexOf(targetStr));        StringBuffer sb = new StringBuffer(content);        content = sb.reverse().toString();        //使用正则表达式匹配第一个非数字        Matcher matcher = PATTERN.matcher(content);        if (matcher.find()) {            content = content.substring(0, matcher.start());            sb = new StringBuffer(content);            return sb.reverse().toString();        }        //是否为数字        if(NumberUtil.isNumber(content)){            return new StringBuffer(content).reverse().toString();        }        return null;    }}

来源地址：https://blog.csdn.net/wshzfansjk/article/details/131513787