Java 计算两个日期之间的月份、分钟等

m0skit0在这里，它在.Net中。八行代码。用Java显示它。如果你认为你能证明这一点

Dim StartDate As Date = Now
Dim EndDate As Date = Now

EndDate = EndDate.AddSeconds(15)

Dim Months As Long = DateDiff(DateInterval.Month, StartDate, EndDate)
Dim Days As Long = DateDiff(DateInterval.Day, StartDate, EndDate)
Dim Hours As Long = DateDiff(DateInterval.Hour, StartDate, EndDate)
Dim Minutes As Long = DateDiff(DateInterval.Minute, StartDate, EndDate)
Dim Seconds As Long = DateDiff(DateInterval.Second, StartDate, EndDate)

下面的代码是错误的。以Calendar cal2=开始的下半部分将在TimerTask中计算两次之间的差异，并将其分解为月、日、小时、分钟和秒

在顶部，我得到当前日期/时间，然后再加上15秒。然后尝试计算差异。这似乎取决于我在第二次约会上增加了多少时间。我已经为此挣扎了好几天了。在某一点上，除了休息4小时之外，其他一切都匹配，但我是GMT+8，所以这毫无意义。这就是我在时区（UTC）中添加的内容。我读过Joda time的文章，但我对Java和Android还是新手，在几次尝试安装这些库之后，我又回到了纯Java。痛苦

谁设计过日期/时间？要么是疯子，要么是受虐狂，要么两者兼而有之

（在.Net中，这是8行代码。8行！）

---

这项工作没有任何额外的进口，它占闰年

import java.util.Calendar;

public class Interval {

    int currentYear, currentMonth, currentDay, currentHour, currentMinute, currentSecond,
        otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond;

    public static void main(String[] args) {
        new Interval();
    }

    public Interval() {
        Calendar cal = Calendar.getInstance();

        //Set current date values
        currentYear = cal.get(Calendar.YEAR);
        currentMonth = cal.get(Calendar.MONTH);
        currentDay = cal.get(Calendar.DAY_OF_MONTH);
        currentHour = cal.get(Calendar.HOUR_OF_DAY); //Automatically in military time
        currentMinute = cal.get(Calendar.MINUTE);
        currentSecond = cal.get(Calendar.SECOND);

        //Set other date values for testing
        otherYear = 2015;//year is the same
        otherMonth = 5;//months start at 0 (0-11)
        otherDay = 1;//days start at 1
        otherHour = 19;//hours start at 0 (0-23, military time)
        otherMinute = 59;//minutes start at 0 (0-59)
        otherSecond = 0;//seconds start at 0 (0-59)

        int yearDifference = 0, monthDifference = 0, dayDifference = 0, hourDifference = 0,
                minuteDifference = 0, secondDifference = 0;

        //Calculate Differences
        yearDifference = otherYear - currentYear;
        monthDifference = otherMonth - currentMonth;
        dayDifference = otherDay - currentDay;
        hourDifference = otherHour - currentHour;
        minuteDifference = otherMinute - currentMinute;
        secondDifference = otherSecond - currentSecond;

        //Determine Days in given month
        int daysInCurrentMonth = 0;
        if(currentMonth == 1) {

            //Check for Leap Year
            if(currentYear % 4 == 0) {
                daysInCurrentMonth = 29;
            }
            else {
                daysInCurrentMonth = 28;
            }
        }
        else if(currentMonth == 0 || currentMonth == 2 || currentMonth == 4 || currentMonth == 6 ||
                currentMonth == 7 || currentMonth == 9 || currentMonth == 11) {
            daysInCurrentMonth = 31;
        }
        else {
            daysInCurrentMonth = 30;
        }

        //Deduct 1 from upper value if current is negative
        if(secondDifference < 0) {
            minuteDifference--;
            secondDifference += 60; 
        }
        if(minuteDifference < 0) {
            hourDifference--;
            minuteDifference += 60; 
        }
        if(hourDifference < 0) {
            dayDifference--;
            hourDifference += 24; 
        }
        if(dayDifference < 0) {
            monthDifference--;
            dayDifference += daysInCurrentMonth; 
        }
        if(monthDifference < 0) {
            yearDifference--;
            monthDifference += 12; 
        }

        System.out.println("Difference of " + yearDifference + " years, " + monthDifference + " months, " + dayDifference + " days, " +
            hourDifference + " hours, " + minuteDifference + " minutes, and " + secondDifference + " seconds.");
    }
}

import java.util.Calendar；
公课间隔{
int currentYear、currentMonth、currentDay、currentHour、currentMinute、currentSecond、，
其他年、其他月、其他日、其他小时、其他分钟、其他秒；
公共静态void main（字符串[]args）{
新区间（）；
}
公共间隔（）{
Calendar cal=Calendar.getInstance（）；
//设置当前日期值
currentYear=cal.get（日历年）；
currentMonth=cal.get（日历.MONTH）；
currentDay=cal.get（日历日期，每月的第天）；
currentHour=cal.get（Calendar.HOUR OF_DAY）；//在军事时间自动
currentMinute=cal.get（Calendar.MINUTE）；
currentSecond=cal.get（Calendar.SECOND）；
//设置测试的其他日期值
otherYear=2015；//年份相同
otherMonth=5；//月份从0（0-11）开始
otherDay=1；//天从1开始
otherHour=19；//小时从0开始（0-23，军事时间）
otherMinute=59；//分钟从0开始（0-59）
otherSecond=0；//秒从0开始（0-59）
年内差异=0，月差异=0，日差异=0，小时差异=0，
分钟差=0，秒差=0；
//计算差异
年份差异=其他年份-当前年份；
monthDifference=其他月份-当前月份；
日差=其他日-当前日；
hourDifference=其他小时-当前小时；
分钟差异=其他分钟-当前分钟；
秒差=其他秒-当前秒；
//确定给定月份的天数
int daysInCurrentMonth=0；
如果（当前月份==1）{
//检查闰年
如果（当前年份%4==0）{
daysInCurrentMonth=29；
}
否则{
daysInCurrentMonth=28；
}
}
如果（currentMonth==0 | | currentMonth==2 | | currentMonth==4 | | currentMonth==6||
当前月==7 | |当前月==9 | |当前月==11）{
daysInCurrentMonth=31；
}
否则{
daysInCurrentMonth=30；
}
//如果电流为负，则从上限值中减去1
如果（二次差<0）{
分钟差异--；
二次差+=60；
}
if（分钟差异<0）{
时差--；
分钟差+=60；
}
如果（小时差异<0）{
日差--；
时差+=24；
}
如果（日差<0）{
月差--；
日差+=当前月的日数；
}
如果（月差<0）{
年差--；
月差+=12；
}
System.out.println（“年差+年差+月差+月差+日差+日差，”+
小时差+小时差+分钟差+分钟差+秒差）；
}
}

import java.util.Calendar;

public class Interval {

    int currentYear, currentMonth, currentDay, currentHour, currentMinute, currentSecond,
        otherYear, otherMonth, otherDay, otherHour, otherMinute, otherSecond;

    public static void main(String[] args) {
        new Interval();
    }

    public Interval() {
        Calendar cal = Calendar.getInstance();

        //Set current date values
        currentYear = cal.get(Calendar.YEAR);
        currentMonth = cal.get(Calendar.MONTH);
        currentDay = cal.get(Calendar.DAY_OF_MONTH);
        currentHour = cal.get(Calendar.HOUR_OF_DAY); //Automatically in military time
        currentMinute = cal.get(Calendar.MINUTE);
        currentSecond = cal.get(Calendar.SECOND);

        //Set other date values for testing
        otherYear = 2015;//year is the same
        otherMonth = 5;//months start at 0 (0-11)
        otherDay = 1;//days start at 1
        otherHour = 19;//hours start at 0 (0-23, military time)
        otherMinute = 59;//minutes start at 0 (0-59)
        otherSecond = 0;//seconds start at 0 (0-59)

        int yearDifference = 0, monthDifference = 0, dayDifference = 0, hourDifference = 0,
                minuteDifference = 0, secondDifference = 0;

        //Calculate Differences
        yearDifference = otherYear - currentYear;
        monthDifference = otherMonth - currentMonth;
        dayDifference = otherDay - currentDay;
        hourDifference = otherHour - currentHour;
        minuteDifference = otherMinute - currentMinute;
        secondDifference = otherSecond - currentSecond;

        //Determine Days in given month
        int daysInCurrentMonth = 0;
        if(currentMonth == 1) {

            //Check for Leap Year
            if(currentYear % 4 == 0) {
                daysInCurrentMonth = 29;
            }
            else {
                daysInCurrentMonth = 28;
            }
        }
        else if(currentMonth == 0 || currentMonth == 2 || currentMonth == 4 || currentMonth == 6 ||
                currentMonth == 7 || currentMonth == 9 || currentMonth == 11) {
            daysInCurrentMonth = 31;
        }
        else {
            daysInCurrentMonth = 30;
        }

        //Deduct 1 from upper value if current is negative
        if(secondDifference < 0) {
            minuteDifference--;
            secondDifference += 60; 
        }
        if(minuteDifference < 0) {
            hourDifference--;
            minuteDifference += 60; 
        }
        if(hourDifference < 0) {
            dayDifference--;
            hourDifference += 24; 
        }
        if(dayDifference < 0) {
            monthDifference--;
            dayDifference += daysInCurrentMonth; 
        }
        if(monthDifference < 0) {
            yearDifference--;
            monthDifference += 12; 
        }

        System.out.println("Difference of " + yearDifference + " years, " + monthDifference + " months, " + dayDifference + " days, " +
            hourDifference + " hours, " + minuteDifference + " minutes, and " + secondDifference + " seconds.");
    }
}