JAVA计算学校学期周次

2020-09-09

/

0 评论

/

313 阅读

/

正在检测是否收录...

09/09

package com.zs.create.test;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class Test {

public static void main(String[] args) throws ParseException {

// 获取今年一年的总周次

System.out.println(school_week("2020-08-31","2021-03-01","2021-01-04"));

}

/**

* 根据第一学期开学时间

* 第二学期开学时间

* 现在时间

* 计算当前时间的周次

* @param firstSemesterStr - 第一学期开学时间

* @param secondSemesterStr - 第二学期开学时间

* @param nowDateStr - 当前时间

* @return 当前学期下的周次

* @deprecated 参数必须要 yyyy-MM-dd 字符串格式

* */

public static int school_week(String firstSemesterStr, String secondSemesterStr,

String nowDateStr) throws ParseException {

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

SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy");

Date firstSemester = sdf.parse(firstSemesterStr);

Date secondSemester = sdf.parse(secondSemesterStr);

Date nowDate = sdf.parse(nowDateStr);

Date nodeTime = sdf.parse(sdf1.format(firstSemester) + "-12-31");

if (nowDate.getTime()>firstSemester.getTime() && nowDate.getTime()

< secondSemester.getTime()){

//第一学期

if(nowDate.getTime()>nodeTime.getTime()){

// 出现跨年情况

if (Current_week(nowDate.getTime()) == Current_week(nodeTime.getTime())){

return Current_week(nodeTime.getTime())-Current_week(firstSemester.getTime())+1;

}

return (Current_week(nodeTime.getTime()) + Current_week(nowDate.getTime()))

- Current_week(firstSemester.getTime())+1;

}else{

// 没有跨年

return Current_week(nowDate.getTime())-Current_week(firstSemester.getTime())+1;

}

}else {

// 第二学期

return Current_week(nowDate.getTime())-Current_week(secondSemester.getTime())+1;

}

}

/**

* @param time - 时间戳

* @return 回当前时间所在年的周次

* */

public static int Current_week(long time) {

Calendar calendar = Calendar.getInstance();

calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置星期一为一周开始的第一天

calendar.setMinimalDaysInFirstWeek(4);//可以不用设置

calendar.setTimeInMillis(time);//时间戳

int weekOfYear = calendar.get(Calendar.WEEK_OF_YEAR);//获得当前日期属于今年的第几周

return weekOfYear;

}

}

赞 · 0