?Java代碼

package date;

?

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

?

public class CalculateIntervalBetween2Dates {

private static final long DAY=24*60*60*1000;

private static final long HOUR=60*60*1000;

private static final long MINUTES=60*1000;

private static final long SECONDS=1000;

private static final long MILLIONSECONDS=1;

?

public static void main(String[] args) {

String startDateStr = "20121022";

String endDateStr = "20121206";

CalculateIntervalBetween2Dates.listNumberOfDates(startDateStr, endDateStr);

CalculateIntervalBetween2Dates.calculateInterval(startDateStr, endDateStr,MILLIONSECONDS);

CalculateIntervalBetween2Dates.calculateInterval(startDateStr, endDateStr,SECONDS);

CalculateIntervalBetween2Dates.calculateInterval(startDateStr, endDateStr,MINUTES);

CalculateIntervalBetween2Dates.calculateInterval(startDateStr, endDateStr,HOUR);

CalculateIntervalBetween2Dates.calculateInterval(startDateStr, endDateStr,DAY);

}

?

/**

* List dates between start date and end date, including the start date and end date.

* @param startDateStr

* @param endDateStr

*/

public static void listNumberOfDates(String startDateStr,String endDateStr){

SimpleDateFormat sf = new SimpleDateFormat("yyyyMMdd");

Date startDate = null;

Date endDate = null;

try {

startDate = sf.parse(startDateStr);

endDate = sf.parse(endDateStr);

} catch (ParseException e) {

e.printStackTrace();

}

Calendar c1 = Calendar.getInstance();

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

if (startDate != null && endDate != null && startDate.before(endDate)) {

Date tempDate = startDate;

do {

cancelDates.add(tempDate);

c1.setTime(tempDate);

c1.add(Calendar.DAY_OF_MONTH, 1);

tempDate = c1.getTime();

} while (tempDate.before(endDate));

cancelDates.add(endDate);

}

?

System.out.println("There are " + cancelDates.size() + " days between " + sf.format(startDate) + " and " + sf.format(endDate) + ", inclusive.");

System.out.println("See the following list:");

for (Date date : cancelDates) {

System.out.println(sf.format(date));

}

System.out.println();

}

?

/**

* Calculate how many days/hours/minutes/seconds/million seconds between start date and end date, including the start date and end date.

* @param startDateStr

* @param endDateStr

* @param interval

*/

public static void calculateInterval(String startDateStr,String endDateStr,long interval){

SimpleDateFormat sf = new SimpleDateFormat("yyyyMMdd");

Date startDate = null;

Date endDate = null;

try {

startDate = sf.parse(startDateStr);

endDate = sf.parse(endDateStr);

} catch (ParseException e) {

e.printStackTrace();

}

Calendar c1 = Calendar.getInstance();

c1.setTime(startDate);

long startInMillis=c1.getTimeInMillis();

c1.setTime(endDate);

//inclusive,2009/10/24-2009/10/23=1,but actually 2 days

c1.add(Calendar.DAY_OF_MONTH, 1);

?

long endInMillis=c1.getTimeInMillis();

long between=endInMillis-startInMillis;

System.out.println("There are " + (between/interval) +" "+getIntervalLabel(interval) + " between " + sf.format(startDate) + " and " + sf.format(endDate) + ", inclusive");

}

?

private static String getIntervalLabel(long interval){

if(interval==DAY){

return "days";

}else if(interval==HOUR){

return "hours";

}else if(interval==MINUTES){

return "minutes";

}else if(interval==SECONDS){

return "seconds";

}else if(interval==MILLIONSECONDS){

return "million seconds";

}else{

return "error";

}

}

} ?

轉載于:https://blog.51cto.com/shuaigee/1140917

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