내 데이트에 회의록을 추가하는 방법

내 데이트에 회의록을 추가하는 방법

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이 날짜 개체가 있습니다.

SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd HH:mm");
Date d1 = df.parse(interviewList.get(37).getTime());

d1의 값은 Fri Jan 07 17:40:00 PKT 2011

이제 위의 날짜에 10 분을 추가하려고합니다.

Calendar cal = Calendar.getInstance();
cal.setTime(d1);
cal.add(Calendar.MINUTE, 10);
String newTime = df.format(cal.getTime());

에 대한 newTime변경 값 2011-50-07 17:50이지만이어야합니다 07-01-2011 17:50.

분을 올바르게 추가하지만 월도 변경됩니다. 이유를 모르겠습니다!

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당신의 문제는 당신이 사용하고 있다는 것 mm입니다. 당신은 사용해야합니다 MM. MM월 및 mm분입니다. 시도yyyy-MM-dd HH:mm

기타 접근 방식 :

이것만큼 간단 할 수 있습니다 (다른 옵션은 joda-time 을 사용하는 것입니다 )

static final long ONE_MINUTE_IN_MILLIS=60000;//millisecs

Calendar date = Calendar.getInstance();
long t= date.getTimeInMillis();
Date afterAddingTenMins=new Date(t + (10 * ONE_MINUTE_IN_MILLIS));

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org.apache.commons.lang3.time 패키지에서 DateUtils 클래스를 사용할 수 있습니다.

int addMinuteTime = 5;
Date targetTime = new Date(); //now
targetTime = DateUtils.addMinutes(targetTime, addMinuteTime); //add minute

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@Pangea의 답변을 구현하는 편리한 방법 :

/*
*  Convenience method to add a specified number of minutes to a Date object
*  From: http://stackoverflow.com/questions/9043981/how-to-add-minutes-to-my-date
*  @param  minutes  The number of minutes to add
*  @param  beforeTime  The time that will have minutes added to it
*  @return  A date object with the specified number of minutes added to it 
*/
private static Date addMinutesToDate(int minutes, Date beforeTime){
    final long ONE_MINUTE_IN_MILLIS = 60000;//millisecs

    long curTimeInMs = beforeTime.getTime();
    Date afterAddingMins = new Date(curTimeInMs + (minutes * ONE_MINUTE_IN_MILLIS));
    return afterAddingMins;
}

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종속성을 피하기 위해 다음과 같이 java.util.Calendar를 사용할 수 있습니다.

    Calendar now = Calendar.getInstance();
    now.add(Calendar.MINUTE, 10);
    Date teenMinutesFromNow = now.getTime();

Java 8에는 새로운 API가 있습니다.

    LocalDateTime dateTime = LocalDateTime.now().plus(Duration.of(10, ChronoUnit.MINUTES));
    Date tmfn = Date.from(dateTime.atZone(ZoneId.systemDefault()).toInstant());

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이것은 잘못 지정되었습니다.

SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd HH:mm");

월 (MM) 대신 분을 사용하고 있습니다.

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tl; dr

LocalDateTime.parse( 
    "2016-01-23 12:34".replace( " " , "T" )
)
.atZone( ZoneId.of( "Asia/Karachi" ) )
.plusMinutes( 10 )

java.time

Use the excellent java.time classes for date-time work. These classes supplant the troublesome old date-time classes such as java.util.Date and java.util.Calendar.

ISO 8601

The java.time classes use standard ISO 8601 formats by default for parsing/generating strings of date-time values. To make your input string comply, replace the SPACE in the middle with a T.

String input = "2016-01-23 12:34" ;
String inputModified = input.replace( " " , "T" );

LocalDateTime

Parse your input string as a LocalDateTime as it lacks any info about time zone or offset-from-UTC.

LocalDateTime ldt = LocalDateTime.parse( inputModified );

Add ten minutes.

LocalDateTime ldtLater = ldt.plusMinutes( 10 );

ldt.toString(): 2016-01-23T12:34

ldtLater.toString(): 2016-01-23T12:44

See live code in IdeOne.com.

That LocalDateTime has no time zone, so it does not represent a point on the timeline. Apply a time zone to translate to an actual moment. Specify a proper time zone name in the format of continent/region, such as America/Montreal, Africa/Casablanca, or Pacific/Auckland, or Asia/Karachi. Never use the 3-4 letter abbreviation such as EST or IST or PKT as they are not true time zones, not standardized, and not even unique(!).

ZonedDateTime

If you know the intended time zone for this value, apply a ZoneId to get a ZonedDateTime.

ZoneId z = ZoneId.of( "Asia/Karachi" );
ZonedDateTime zdt = ldt.atZone( z );

zdt.toString(): 2016-01-23T12:44+05:00[Asia/Karachi]

Anomalies

Think about whether to add those ten minutes before or after adding a time zone. You may get a very different result because of anomalies such as Daylight Saving Time (DST) that shift the wall-clock time.

Whether you should add the 10 minutes before or after adding the zone depends on the meaning of your business scenario and rules.

Tip: When you intend a specific moment on the timeline, always keep the time zone information. Do not lose that info, as done with your input data. Is the value 12:34 meant to be noon in Pakistan or noon in France or noon in Québec? If you meant noon in Pakistan, say so by including at least the offset-from-UTC (+05:00), and better still, the name of the time zone (Asia/Karachi).

Instant

If you want the same moment as seen through the lens of UTC, extract an Instant. The Instant class represents a moment on the timeline in UTC with a resolution of nanoseconds (up to nine (9) digits of a decimal fraction).

Instant instant = zdt.toInstant();

Convert

Avoid the troublesome old date-time classes whenever possible. But if you must, you can convert. Call new methods added to the old classes.

java.util.Date utilDate = java.util.Date.from( instant );

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About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to java.time.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

Where to obtain the java.time classes?

• Java SE 8 and SE 9 and later
  • Built-in.
  • Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and SE 7
  • Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
  • See How to use….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

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There's an error in the pattern of your SimpleDateFormat. it should be

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");

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use this format,

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");

mm for minutes and MM for mounth

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Once you have you date parsed, I use this utility function to add hours, minutes or seconds:

public class DateTimeUtils {
    private static final long ONE_HOUR_IN_MS = 3600000;
    private static final long ONE_MIN_IN_MS = 60000;
    private static final long ONE_SEC_IN_MS = 1000;

    public static Date sumTimeToDate(Date date, int hours, int mins, int secs) {
        long hoursToAddInMs = hours * ONE_HOUR_IN_MS;
        long minsToAddInMs = mins * ONE_MIN_IN_MS;
        long secsToAddInMs = secs * ONE_SEC_IN_MS;
        return new Date(date.getTime() + hoursToAddInMs + minsToAddInMs + secsToAddInMs);
    }
}

Be careful when adding long periods of time, 1 day is not always 24 hours (daylight savings-type adjustments, leap seconds and so on), Calendar is recommended for that.

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Work for me DateUtils

//import
import org.apache.commons.lang.time.DateUtils

...

        //Added and removed minutes to increase current range dates
        Date horaInicialCorteEspecial = DateUtils.addMinutes(new Date(corteEspecial.horaInicial.getTime()),-1)
        Date horaFinalCorteEspecial = DateUtils.addMinutes(new Date(corteEspecial.horaFinal.getTime()),1)

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Just for anybody who is interested. I was working on an iOS project that required similar functionality so I ended porting the answer by @jeznag to swift

private func addMinutesToDate(minutes: Int, beforeDate: NSDate) -> NSDate {
    var SIXTY_SECONDS = 60

    var m = (Double) (minutes * SIXTY_SECONDS)
    var c =  beforeDate.timeIntervalSince1970  + m
    var newDate = NSDate(timeIntervalSince1970: c)

    return newDate
}

참고URL : https://stackoverflow.com/questions/9043981/how-to-add-minutes-to-my-date