java生成一年中假日表（包括周末和法定假期），用于计算一年中的工作日

java生成一年中假日表（包括周末和法定假期），用于计算一年中的工作日

项目中有个需求要求计算工作日天数的，于是写了段代码用于生成一年假日表，以辅助实现功能

思路：计算一个时间区间内工作日的天数，只要计算出这个时间区间的天数，再减去休息日的天数就可以了。但是有点麻烦的是休息日的统计，因为它不仅包括周末时间，还包括放假时间，放假还要考虑周末补班的，工作日放假休息的。

步骤：

1、把一年内的所有周末加入到假期表中。

2、把一年中所有的法定假期加入到假期表中（需等国务院公布，所以要一年跑一次维护假期表）。

3、把周末需要补班的日子从表中剔除掉。

上面还有一个细节就是法定假期里可能也有周末，所以插入前要检查避免重复插入。这样我们就得到了一张包括一年中所有假期的假期数据表了。具体实现代码如下，纯属能跑没仔细优化：

package com.util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

import java.util.UUID;

/**

* 将一年内的所有假日插入到假日表里

* @author ch

* @time 2016-1-15 下午6:06:11

*/

public class InsertHolidayUtil {

public static void main(String[] args){

//驱动程序名

String driver = "com.mysql.jdbc.Driver";

//要插入的数据库，表

String url = "jdbc:mysql://127.0.0.1:3306/xx_web";

String user = "root";

String password = "123456";

try {

//加载驱动程序

Class.forName(driver);

//连续MySQL 数据库

Connection conn = DriverManager.getConnection(url, user, password);

if(!conn.isClosed())

System.out.println("Succeeded connecting to the Database!");

//statement用来执行SQL语句

Statement statement = conn.createStatement();

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

java.util.Date start = sdf.parse("2016-01-01");//开始时间

java.util.Date end = sdf.parse("2016-12-31");//结束时间

List<Date> lists = dateSplit(start, end);

//-------------------插入周末时间---------------

if (!lists.isEmpty()) {

for (Date date : lists) {

Calendar cal = Calendar.getInstance();

cal.setTime(date);

if(cal.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY||cal.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY)

{

System.out.println("插入日期:" + sdf.format(date) + ",周末");

String insertSql = "INSERT INTO fn_all_holiday (id,title,holiday_date) VALUES('"+UUID.randomUUID()+"',"+"'周末','"+sdf.format(date)+"')";

statement.executeUpdate(insertSql);

}

}

}

//---------------插入节假日时间------------------

List<Days> holidays = new ArrayList<Days>();

holidays.add(new Days(UUID.randomUUID().toString(),"元旦", sdf.parse("2016-01-01")));

holidays.add(new Days(UUID.randomUUID().toString(),"元旦", sdf.parse("2016-01-02")));

holidays.add(new Days(UUID.randomUUID().toString(),"元旦", sdf.parse("2016-01-03")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-07")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-08")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-09")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-10")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-11")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-12")));

holidays.add(new Days(UUID.randomUUID().toString(),"春节", sdf.parse("2016-02-13")));

holidays.add(new Days(UUID.randomUUID().toString(),"清明节", sdf.parse("2016-04-02")));

holidays.add(new Days(UUID.randomUUID().toString(),"清明节", sdf.parse("2016-04-03")));

holidays.add(new Days(UUID.randomUUID().toString(),"清明节", sdf.parse("2016-04-04")));

holidays.add(new Days(UUID.randomUUID().toString(),"劳动节", sdf.parse("2016-04-30")));

holidays.add(new Days(UUID.randomUUID().toString(),"劳动节", sdf.parse("2016-05-01")));

holidays.add(new Days(UUID.randomUUID().toString(),"劳动节", sdf.parse("2016-05-02")));

holidays.add(new Days(UUID.randomUUID().toString(),"端午节", sdf.parse("2016-06-09")));

holidays.add(new Days(UUID.randomUUID().toString(),"端午节", sdf.parse("2016-06-10")));

holidays.add(new Days(UUID.randomUUID().toString(),"端午节", sdf.parse("2016-06-11")));

holidays.add(new Days(UUID.randomUUID().toString(),"中秋节", sdf.parse("2016-09-15")));

holidays.add(new Days(UUID.randomUUID().toString(),"中秋节", sdf.parse("2016-09-16")));

holidays.add(new Days(UUID.randomUUID().toString(),"中秋节", sdf.parse("2016-09-17")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-01")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-02")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-03")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-04")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-05")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-06")));

holidays.add(new Days(UUID.randomUUID().toString(),"国庆节", sdf.parse("2016-10-07")));

for(Days day:holidays) {

//跟周末冲突的，不重复插入

String sql = "select count(1) as numbers from fn_all_holiday where holiday_date ='" + sdf.format(day.getDate()) + "'";

//结果集

ResultSet rs = statement.executeQuery(sql);

boolean hasRecord = false;

while(rs.next()) {

if(!"0".equals(rs.getString("numbers"))) {

hasRecord = true;

}

}

if(!hasRecord) {

System.out.println("插入日期：" + sdf.format(day.getDate()) + "," + day.getTitle());

String insertSql = "INSERT INTO fn_all_holiday (id,title,holiday_date) VALUES('"+day.getId()+"',"+"'"+day.getTitle()+"','"+sdf.format(day.getDate())+"')";

statement.executeUpdate(insertSql);

}

}

//-------------- 剔除补班时间(周末需要补班的)---------------------

List<Days> workDays = new ArrayList<Days>();

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-02-06")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-02-14")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-05-02")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-06-12")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-09-18")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-10-08")));

workDays.add(new Days(UUID.randomUUID().toString(),"补班", sdf.parse("2016-10-09")));

for(Days day:workDays) {

System.out.println("剔除日期：" + sdf.format(day.getDate()) + "," + day.getTitle());

String delSql = "delete from fn_all_holiday where holiday_date ='" + sdf.format(day.getDate()) + "'";

statement.executeUpdate(delSql);

}

conn.close();

}

catch(ClassNotFoundException e) {

System.out.println("Sorry,can't find the Driver!");

e.printStackTrace();

}

catch(SQLException e) {

e.printStackTrace();

}

catch(Exception e) {

e.printStackTrace();

}

}

private static List<Date> dateSplit(java.util.Date start, Date end)

throws Exception {

if (!start.before(end))

throw new Exception("开始时间应该在结束时间之后");

Long spi = end.getTime() - start.getTime();

Long step = spi / (24 * 60 * 60 * 1000);// 相隔天数

List<Date> dateList = new ArrayList<Date>();

dateList.add(end);

for (int i = 1; i <= step; i++) {

dateList.add(new Date(dateList.get(i - 1).getTime()

- (24 * 60 * 60 * 1000)));// 比上一天减一

}

return dateList;

}

}

package com.util;

import java.util.Date;

public class Days {

private String id;

private String title;

private Date date;

public Days(String id,String title,Date date) {

this.id = id;

this.title = title;

this.date = date;

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public Date getDate() {

return date;

}

public void setDate(Date date) {

this.date = date;

}

}