基于Java代码实现判断春节、端午节、中秋节等法定节假日的方法

一、前言

最近工作上遇到一个问题,后端有一个定时任务,需要用JAVA每天判断法定节假日、周末放假,上班等情况,其实想单独通过逻辑什么的去判断中国法定节假日的放假情况,基本不可能,因为国家每一年的假期可能不一样,是人为设定的;

所以只能依靠其它手段,能想到的比较靠谱的如下:

1.网络接口:有些数据服务商会提供,要么是收钱的,要么是次数限制,等等各种问题,效果不理想,可控性差,我也没试过,如:

https://www.juhe.cn/docs/api/id/177/aid/601

或者

http://apistore.baidu.com/apiworks/servicedetail/1116.html

2.在线解析网页信息,获取节假日情况:严重依赖被解析的网站网页,所以在选取网站的时候,要找稍微靠谱点的;

3.根据国家规定的法定节假日放假情况,每年录入系统,这种如果客户不怕麻烦的话。还是比较靠谱的;

本Demo将选择第二种来实现;

二、使用htmlunit在线解析网页信息,获取节假日情况

一开始是使用jsoup去解析网页的,效果不理想,如果网页是动态生成的时候,用jsoup遇到了各种问题,所以改成了htmlunit,总得来说htmlunit还是很强大的,能够模拟浏览器运行,被誉为java浏览器的开源实现;

首先去官网下载相关jar包,以及阅读相关文档:

http://htmlunit.sourceforge.net/

我这里解析的网页是360的万年历:

http://hao.360.cn/rili/

日历界面如下:

被解析的 HTML格式如下:

实现步骤:

1、加载页面;

2、循环等待页面加载完成(可能会有一些动态页面,是用javascript生成);

3、根据网页格式解析html内容,并提取关键信息存入封装好的对象;

注意点:

1、难点在于判断是否休假及假期类型,由于原页面并没有标明每一天的假期类型,所以这里的逻辑要自己去实现,详情参考代码;

2、之所以有个静态latestVocationName变量,是防止出现以下情况(出现该情况的概率极低;PS:方法要每天调用一次,该变量才生效):

代码实现:

定义一个中国日期类:

package com.pichen.tools.getDate;

import java.util.Date;

public class ChinaDate {

/**

* 公历时间

*/

private Date solarDate;

/**

* 农历日

*/

private String lunar;

/**

* 公历日

*/

private String solar;

/**

* 是否是 休

*/

private boolean isVacation = false;

/**

* 如果是 休情况下的假期名字

*/

private String VacationName = "非假期";

/**

* 是否是 班

*/

private boolean isWorkFlag = false;

private boolean isSaturday = false;

private boolean isSunday = false;

/**

* @return the solarDate

*/

public Date getSolarDate() {

return solarDate;

}

/**

* @param solarDate the solarDate to set

*/

public void setSolarDate(Date solarDate) {

this.solarDate = solarDate;

}

/**

* @return the lunar

*/

public String getLunar() {

return lunar;

}

/**

* @param lunar the lunar to set

*/

public void setLunar(String lunar) {

this.lunar = lunar;

}

/**

* @return the solar

*/

public String getSolar() {

return solar;

}

/**

* @param solar the solar to set

*/

public void setSolar(String solar) {

this.solar = solar;

}

/**

* @return the isVacation

*/

public boolean isVacation() {

return isVacation;

}

/**

* @param isVacation the isVacation to set

*/

public void setVacation(boolean isVacation) {

this.isVacation = isVacation;

}

/**

* @return the vacationName

*/

public String getVacationName() {

return VacationName;

}

/**

* @param vacationName the vacationName to set

*/

public void setVacationName(String vacationName) {

VacationName = vacationName;

}

/**

* @return the isWorkFlag

*/

public boolean isWorkFlag() {

return isWorkFlag;

}

/**

* @param isWorkFlag the isWorkFlag to set

*/

public void setWorkFlag(boolean isWorkFlag) {

this.isWorkFlag = isWorkFlag;

}

/**

* @return the isSaturday

*/

public boolean isSaturday() {

return isSaturday;

}

/**

* @param isSaturday the isSaturday to set

*/

public void setSaturday(boolean isSaturday) {

this.isSaturday = isSaturday;

}

/**

* @return the isSunday

*/

public boolean isSunday() {

return isSunday;

}

/**

* @param isSunday the isSunday to set

*/

public void setSunday(boolean isSunday) {

this.isSunday = isSunday;

}

}

解析网页,并调用demo,打印本月详情,和当天详情:

package com.pichen.tools.getDate;

import java.io.IOException;

import java.net.MalformedURLException;

import java.text.DateFormat;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;

import com.gargoylesoftware.htmlunit.WebClient;

import com.gargoylesoftware.htmlunit.html.DomNodeList;

import com.gargoylesoftware.htmlunit.html.HtmlElement;

import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class Main {

private static String latestVocationName="";

public String getVocationName(DomNodeList<HtmlElement> htmlElements, String date) throws ParseException{

String rst = "";

boolean pastTimeFlag = false;

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

Date paramDate = dateFormat.parse(date);

if(new Date().getTime() >= paramDate.getTime()){

pastTimeFlag = true;

}

//first step //jugde if can get vocation name from html page

for(int i = 0; i < htmlElements.size(); i++){

HtmlElement element = htmlElements.get(i);

if(element.getAttribute("class").indexOf("vacation")!=-1){

boolean hitFlag = false;

String voationName = "";

for(; i < htmlElements.size(); i++){

HtmlElement elementTmp = htmlElements.get(i);

String liDate = elementTmp.getAttribute("date");

List<HtmlElement> lunar = elementTmp.getElementsByAttribute("span", "class", "lunar");

String lanarText = lunar.get(0).asText();

if(lanarText.equals("元旦")){

voationName = "元旦";

}else if(lanarText.equals("除夕")||lanarText.equals("春节")){

voationName = "春节";

}else if(lanarText.equals("清明")){

voationName = "清明";

}else if(lanarText.equals("国际劳动节")){

voationName = "国际劳动节";

}else if(lanarText.equals("端午节")){

voationName = "端午节";

}else if(lanarText.equals("中秋节")){

voationName = "中秋节";

}else if(lanarText.equals("国庆节")){

voationName = "国庆节";

}

if(liDate.equals(date)){

hitFlag = true;

}

if(elementTmp.getAttribute("class").indexOf("vacation")==-1){

break;

}

}

if(hitFlag == true && !voationName.equals("")){

rst = voationName;

break;

}

}else{

continue;

}

}

//if first step fail(rarely), get from the latest Vocation name

if(rst.equals("")){

System.out.println("warning: fail to get vocation name from html page.");

//you can judge by some simple rule

//from the latest Vocation name

rst = Main.latestVocationName;

}else if(pastTimeFlag == true){

//更新《当前时间,且最近一次的可见的假期名

Main.latestVocationName = rst;

}

return rst;

}

public List<ChinaDate> getCurrentDateInfo(){

WebClient webClient = null;

List<ChinaDate> dateList = null;

try{

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

dateList = new ArrayList<ChinaDate>();

webClient = new WebClient();

HtmlPage page = webClient.getPage("http://hao.360.cn/rili/");

//最大等待60秒

for(int k = 0; k < 60; k++){

if(!page.getElementById("M-dates").asText().equals("")) break;

Thread.sleep(1000);

}

//睡了8秒,等待页面加载完成...,有时候,页面可能获取不到,不稳定()

//Thread.sleep(8000);

DomNodeList<HtmlElement> htmlElements = page.getElementById("M-dates").getElementsByTagName("li");

//System.out.println(htmlElements.size());

for(HtmlElement element : htmlElements){

ChinaDate chinaDate = new ChinaDate();

List<HtmlElement> lunar = element.getElementsByAttribute("span", "class", "lunar");

List<HtmlElement> solar = element.getElementsByAttribute("div", "class", "solar");

chinaDate.setLunar(lunar.get(0).asText());

chinaDate.setSolar(solar.get(0).asText());

chinaDate.setSolarDate(dateFormat.parse(element.getAttribute("date")));

if(element.getAttribute("class").indexOf("vacation")!=-1){

chinaDate.setVacation(true);

chinaDate.setVacationName(this.getVocationName(htmlElements, element.getAttribute("date")));

}

if(element.getAttribute("class").indexOf("weekend")!=-1 &&

element.getAttribute("class").indexOf("last")==-1){

chinaDate.setSaturday(true);

}

if(element.getAttribute("class").indexOf("last weekend")!=-1){

chinaDate.setSunday(true);

}

if(element.getAttribute("class").indexOf("work")!=-1){

chinaDate.setWorkFlag(true);

}else if(chinaDate.isSaturday() == false &&

chinaDate.isSunday() == false &&

chinaDate.isVacation() == false ){

chinaDate.setWorkFlag(true);

}else{

chinaDate.setWorkFlag(false);

}

dateList.add(chinaDate);

}

}catch(Exception e){

e.printStackTrace();

System.out.println("get date from http://hao.360.cn/rili/ error~");

}finally{

webClient.close();

}

return dateList;

}

public ChinaDate getTodayInfo(){

List<ChinaDate> dateList = this.getCurrentDateInfo();

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

for(ChinaDate date: dateList){

if(dateFormat.format(date.getSolarDate()).equals(dateFormat.format(new Date()))){

return date;

}

}

return new ChinaDate();

}

public static void main(String[] args) throws FailingHttpStatusCodeException, MalformedURLException, IOException, InterruptedException {

List<ChinaDate> dateList = new Main().getCurrentDateInfo();

ChinaDate today = new Main().getTodayInfo();

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");

System.out.println("本月详情:");

for(ChinaDate date: dateList){

System.out.println(dateFormat.format(date.getSolarDate()) + " " + date.getVacationName());

}

System.out.println("------------------------------------------------------------------------");

System.out.println("今日详情:");

System.out.println("日期:" + today.getSolarDate());

System.out.println("农历:"+today.getLunar());

System.out.println("公历:"+today.getSolar());

System.out.println("假期名:"+today.getVacationName());

System.out.println("是否周六:"+today.isSaturday());

System.out.println("是否周日:"+today.isSunday());

System.out.println("是否休假:"+today.isVacation());

System.out.println("是否工作日:"+today.isWorkFlag());

System.out.println("已发生的最近一次假期:" + Main.latestVocationName);

}

}

运行程序,结果正确:

以上是 基于Java代码实现判断春节、端午节、中秋节等法定节假日的方法 的全部内容, 来源链接: utcz.com/p/208235.html

回到顶部