转：https://www.jianshu.com/p/05ccb5783f65
转：https://www.jianshu.com/p/99931a7a4f0d
获取指定日期的节假日信息: http://api.goseek.cn/

package com.juqitech.zb.common.util;

import net.sf.json.JSONObject;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;


/**
 * 调用API接口判断日期是否是工作日 周末还是节假日
 * 工作日对应结果为 0, 休息日对应结果为 1, 节假日对应的结果为 2
 */
public class HolidayUtil {

    public static int request( String httpArg) {
        String httpUrl = "http://api.goseek.cn/Tools/holiday";
        BufferedReader reader = null;
        String result = null;
        StringBuffer sbf = new StringBuffer();
        httpUrl = httpUrl + "?date=" + httpArg;

        int d=0;//工作日对应结果为 0, 休息日对应结果为 1, 节假日对应的结果为 2

        try {
            URL url = new URL(httpUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            InputStream is = connection.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sbf.append(strRead);
                sbf.append("\r\n");
            }
            reader.close();
            result = sbf.toString();
            JSONObject ob= JSONObject.fromObject(result);
            if(ob!=null){
                d=Integer.parseInt(ob.getString("data"));
            }



        } catch (Exception e) {
            e.printStackTrace();
        }
        return d;
    }

    public static void main(String[] args) {
        //判断今天是否是工作日 周末 还是节假日

        SimpleDateFormat f=new SimpleDateFormat("yyyyMMdd");

        String httpArg="20190216";//f.format(new Date());
        System.out.println(httpArg);
        int n = request(httpArg);
        System.out.println(n);
        //工作日对应结果为 0, 休息日对应结果为 1, 节假日对应的结果为 2

    }
}