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爪哇咖啡屋 : [轉貼]java 如何呼叫 ldap 協議

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冷日
(冷日)		 發表時間：2022/11/1 9:35
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  • 註冊日: 2008/2/19
  • 來自:
  • 發表數: 15771
[轉貼]Timestamp from LDAP
Timestamp from LDAP (ActiveDirectories lastLogonTimestamp)

Question

If I get a Timestamp it's ms since Epoch
1143584229619

But in LDAP I get a value from the timestamp more like
127877417297554938

First though was maybe ms since time of '01/01/0000' or something but it does not add up that way.

Does anyone know what the timestamp maybe; and how I can convert it into something Java can use.

Thanks in advance.

--------------------------------------------------------------------------------

Answers

Hi

lastLogonTimeStamp seems to be the no of 100 nano second intervals starting from 0000 hrs 1/1/1601.

This is similiar to windows file time format and .NET has support to create a System.DateTime object out of this value.. Note the sample here, using the long value that you had provided and watch the date being recreated..

.NET Sample :
import  System.*;
class Test
{
    public static void main(String args[])

    {
    DateTime dt=DateTime.FromFileTime(127877417297554938L);
    System.out.println(dt);
    }
}


Java Sample :
If you want to create a java date object out of this value, please try following this sample, where i have used an adjustment factor to convert the lastLogonTimestamp value into a Date object..

import  java.util.*;
class Test
{
    public static void main(String args[])
    {

           long llastLogonAdjust=11644473600000L;  // adjust factor for converting it to java
                                                                                 //date Epoch
           Date lastLogon = new Date(127877417297554938L/10000-llastLogonAdjust); //
           System.out.println(lastLogon);
    }
}


Thanks

--------------------------------------------------------------------------------

All replies

Hi

lastLogonTimeStamp seems to be the no of 100 nano second intervals starting from 0000 hrs 1/1/1601.

This is similiar to windows file time format and .NET has support to create a System.DateTime object out of this value.. Note the sample here, using the long value that you had provided and watch the date being recreated..

.NET Sample :
import  System.*;
class Test
{
    public static void main(String args[])

    {
    DateTime dt=DateTime.FromFileTime(127877417297554938L);
    System.out.println(dt);
    }
}


Java Sample :
If you want to create a java date object out of this value, please try following this sample, where i have used an adjustment factor to convert the lastLogonTimestamp value into a Date object..

import  java.util.*;
class Test
{
    public static void main(String args[])
    {

           long llastLogonAdjust=11644473600000L;  // adjust factor for converting it to java
                                                                                 //date Epoch
           Date lastLogon = new Date(127877417297554938L/10000-llastLogonAdjust); //
           System.out.println(lastLogon);
    }
}


Thanks
原文出處：Timestamp from LDAP (ActiveDirectories lastLogonTimestamp)


冷日：
簡言之，就是 Windows AD 的時間不是 UnixTimestamp！
所以有一個誤差值：11644473600000L

以下是Java Ldap convert lastLogonTimestamp to DateTime - Stack Overflow提供的解答：
To convert a Win32 filetime string to Date, use:

long fileTime = (Long.parseLong(inputDateString) / 10000L) - 
11644473600000L;
Date inputDate = new Date(fileTime);


To convert a Date to Win32 filetime, use:
long fileTime = (inputDate.getTime() + 11644473600000L) * 10000L;
String outputDate = Long.toString(fileTime);


e.g. 131220409910000000 will be converted to 2016/10/27 14-23-11 and vice versa

Check this url for a nice online epoch/filetime converter:http://www.epochconverter.com/ldap
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