blocks|key|868936|text|您可以从long创建一个Date+-这很简单：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|868937|Date+date+=+new+Date(epochTime);|code-block|syntax|javascript|868938|请注意，这里的epochTime应该是从纪元开始的毫秒数--如果您有从纪元开始的秒数，则乘以1000。|868939|然后，您将创建一个SimpleDateFormat，指定相关的模式、文化和时区。例如：|868940|SimpleDateFormat+format+=+new+SimpleDateFormat("dd/MM/yyyy",+Locale.US);
format.setTimeZone(...);|868941|然后使用它将日期格式化为字符串：|868942|String+text+=+format.format(date);|868943|entityMap^0|4|4|C|4|0|0|7|9|0|9|G|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|O|3|P|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|19|8|@]|D|@]|E|$]]|$1|S|3|T|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|U|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|V|$]]

You'd create a <code>Date</code> from the <code>long</code> - that's easy:

<pre><code>Date date = new Date(epochTime);
</code></pre>

Note that <code>epochTime</code> here ought to be in milliseconds since the epoch - if you've got seconds since the epoch, multiply by 1000.

Then you'd create a <code>SimpleDateFormat</code> specifying the relevant pattern, culture and time zone. For example:

<pre><code>SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy", Locale.US);
format.setTimeZone(...);
</code></pre>

Then use that to format the date to a string:

<pre><code>String text = format.format(date);
</code></pre>

blocks|key|1891071|text|调查SimpleDateFormat|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1891072|SimpleDateFormat+sdf+=+new+SimpleDateFormat("dd/MM/yyyy");
sdf.format(new+Date(myTimeAsLong));|code-block|syntax|javascript|1891073|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html?is-external=true^0|2|G|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Look into <a href="http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html?is-external=true">SimpleDateFormat</a>

<pre><code>SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
sdf.format(new Date(myTimeAsLong));
</code></pre>

blocks|key|1886253|text|您需要知道，在java中，纪元时间是以毫秒为单位的，而您要转换的时间可能是以秒为单位的。确保转换的两端都以毫秒为单位，然后就可以从date对象中获取Date参数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1886254|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You need to be aware that epoch time in java is in milliseconds, while what you are converting may be in seconds. Ensure that both sides of the conversions are in milliseconds, and then you can fetch the date parameters from the Date object.

blocks|key|5314754|text|Joda-Time|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5314755|如果您所说的纪元时间是指自1970年第一个协调世界时起的毫秒数，那么这里有一些使用Joda-Time库…的示例代码|5314756|DateTimeZone+timeZone+=+DateTimeZone.forID(+"Europe/Paris"+);
DateTime+dateTime+=+new+DateTime(+yourMilliseconds,+timeZone+);
String+output+=+DateTimeFormat.forStyle(+"S-"+).withLocale(+Locale.CANADA_FRENCH+).print(+dateTime+);|code-block|syntax|javascript|5314757|其他纪元|5314758|因为它在Unix中的使用，所以对纪元的定义是很常见的。但是要知道，至少有一个couple+dozen+epoch+definitions被各种计算机系统使用。|offset|length|5314759|entityMap|0|LINK|mutability|MUTABLE|url|https://en.wikipedia.org/wiki/Epoch_(reference_date)#Notable_epoch_dates_in_computing^0|0|0|0|0|12|U|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

<h1>Joda-Time</h1>

If by epoch time you meant a count of milliseconds since first moment of 1970 in UTC, then here is some example code using the Joda-Time library…

<pre><code>DateTimeZone timeZone = DateTimeZone.forID( "Europe/Paris" );
DateTime dateTime = new DateTime( yourMilliseconds, timeZone );
String output = DateTimeFormat.forStyle( "S-" ).withLocale( Locale.CANADA_FRENCH ).print( dateTime );
</code></pre>

<h1>Other Epochs</h1>

That definition of epoch is common because of its use within Unix. But be aware that at least a <a href="https://en.wikipedia.org/wiki/Epoch_(reference_date)#Notable_epoch_dates_in_computing" rel="nofollow">couple dozen epoch definitions</a> are used by various computer systems.

blocks|key|5314794|text|Date+date+=+new+Date(String);+|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|5314795|这是不推荐使用的。|unstyled|5314796|解决方案|5314797|++Date+date+=+new+Date(1406178443+*+1000L);
++DateFormat+format+=+new+SimpleDateFormat("yyyy-MM-dd+HH:mm:ss.SSS");
++format.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
++String+formatted+=+format.format(date);|5314798|确保乘以1000L|5314799|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$B|C]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>Date date = new Date(String); 
</code></pre>

this is deprecated.

solution

<pre><code> Date date = new Date(1406178443 * 1000L);
 DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
 format.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
 String formatted = format.format(date);
</code></pre>

make sure multiply by 1000L

blocks|key|1886298|text|试试这个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1886299|示例纪元时间戳为1414492391238|1886300|方法：|offset|length|style|BOLD|1886301|public+static+String+GetHumanReadableDate(long+epochSec,+String+dateFormatStr)+{
++++Date+date+=+new+Date(epochSec+*+1000);
++++SimpleDateFormat+format+=+new+SimpleDateFormat(dateFormatStr,
++++++++++++Locale.getDefault());
++++return+format.format(date);
}|code-block|syntax|javascript|1886302|可用性：|1886303|long+timestamp+=+Long.parseLong(engTime)+/+1000;
String+engTime_+=+GetHumanReadableDate(timestamp,+"dd-MM-yyyy+HH:mm:ss+aa");|1886304|结果：|1886305|28-10-2014+16:03:11+pm|1886306|entityMap^0|0|0|0|3|0|0|0|4|0|0|0|3|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@$F|11|G|12|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|14|8|@$F|15|G|16|H|I]]|9|@]|A|$]]|$1|Q|3|R|5|L|7|17|8|@]|9|@]|A|$M|N]]|$1|S|3|T|5|6|7|18|8|@$F|19|G|1A|H|I]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1B|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|X|$]]

Try this...
sample Epoch timestamp is 1414492391238
Method:
<pre><code>public static String GetHumanReadableDate(long epochSec, String dateFormatStr) {
 Date date = new Date(epochSec * 1000);
 SimpleDateFormat format = new SimpleDateFormat(dateFormatStr,
 Locale.getDefault());
 return format.format(date);
}
</code></pre>
Usability:
<pre><code>long timestamp = Long.parseLong(engTime) / 1000;
String engTime_ = GetHumanReadableDate(timestamp, &quot;dd-MM-yyyy HH:mm:ss aa&quot;);
</code></pre>
Result:
28-10-2014 16:03:11 pm

blocks|key|869066|text|如果该方法应该是可移植的，则最好使用默认(本地时间)+TimeZone.getDefault()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|869067|String+epochToIso8601(long+time)+{
++++String+format+=+"yyyy-MM-dd+HH:mm:ss";
++++SimpleDateFormat+sdf+=+new+SimpleDateFormat(format,+Locale.getDefault());
++++sdf.setTimeZone(TimeZone.getDefault());
++++return+sdf.format(new+Date(time+*+1000));
}|code-block|syntax|javascript|869068|entityMap^0|R|L|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

If the method should be portable, better use the default (local time) <code>TimeZone.getDefault()</code>:
<pre><code>String epochToIso8601(long time) {
 String format = &quot;yyyy-MM-dd HH:mm:ss&quot;;
 SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.getDefault());
 sdf.setTimeZone(TimeZone.getDefault());
 return sdf.format(new Date(time * 1000));
}
</code></pre>

blocks|key|1275547|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1275548|Date+date+=+new+Date(1476126532838L);
DateFormat+format+=+new+SimpleDateFormat("dd/MM/yyyy+HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
String+formatted+=+format.format(date);
format.setTimeZone(TimeZone.getTimeZone("Asia/Colombo"));//your+zone
formatted+=+format.format(date);
System.out.println(formatted);|code-block|syntax|javascript|1275549|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this

<pre><code>Date date = new Date(1476126532838L);
DateFormat format = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));
String formatted = format.format(date);
format.setTimeZone(TimeZone.getTimeZone("Asia/Colombo"));//your zone
formatted = format.format(date);
System.out.println(formatted);
</code></pre>

blocks|key|5314895|text|是时候有人提供现代的答案了(自2014年起有效并推荐)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5314896|java.time|5314897|++++DateTimeFormatter+formatter+=+DateTimeFormatter
++++++++++++.ofLocalizedDateTime(FormatStyle.LONG).withLocale(Locale.US);

++++String+facebookTime+=+"1548410106047";
++++long+fbt+=+Long.parseLong(facebookTime);
++++ZonedDateTime+dateTime+=+Instant.ofEpochMilli(fbt).atZone(ZoneId.of("America/Indiana/Knox"));
++++System.out.println(dateTime.format(formatter));|code-block|syntax|javascript|5314898|输出为：|5314899|5314900|，2019年1月25日，美国中部时间上午3:55:06|blockquote|5314901|5314902|5314903|如果您只想要日期，并且格式较短，请使用例如|5314904|++++DateTimeFormatter+formatter+=+DateTimeFormatter
++++++++++++.ofLocalizedDate(FormatStyle.SHORT).withLocale(Locale.US);|5314905|5314906|+1/25/19|5314907|5314908|5314909|请注意代码片段如何允许您指定时区、语言(区域设置)以及所需格式的长度或长度。|5314910|链接|5314911|5314912|Oracle+tutorial:+Date+Time解释如何使用this+duplicate+question|unordered-list-item|offset|length|5314913|。我的示例字符串取自java.time。|5314914|5314915|5314916|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/tutorial/datetime/|1|https://stackoverflow.com/questions/54664956/converting-the-timestamp-from-facebook-data-after-downloading-messages-in-json-f^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|Q|0|W|N|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1P|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|1S|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1U|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1V|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1W|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|V|3|W|5|N|7|1Y|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|20|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|21|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|22|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|23|8|@]|9|@]|A|$]]|$1|14|3|15|5|16|7|24|8|@]|9|@$17|25|18|26|1|27]|$17|28|18|29|1|2A]]|A|$]]|$1|19|3|1A|5|6|7|2B|8|@]|9|@]|A|$]]|$1|1B|3|-4|5|16|7|2C|8|@]|9|@]|A|$]]|$1|1C|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|1D|3|-4|5|6|7|2E|8|@]|9|@]|A|$]]]|1E|$1F|$5|1G|1H|1I|A|$1J|1K]]|1L|$5|1G|1H|1I|A|$1J|1M]]]]

Time for someone to provide the modern answer (valid and recommended since 2014).

<h2>java.time</h2>

<pre><code> DateTimeFormatter formatter = DateTimeFormatter
 .ofLocalizedDateTime(FormatStyle.LONG).withLocale(Locale.US);

 String facebookTime = "1548410106047";
 long fbt = Long.parseLong(facebookTime);
 ZonedDateTime dateTime = Instant.ofEpochMilli(fbt).atZone(ZoneId.of("America/Indiana/Knox"));
 System.out.println(dateTime.format(formatter));
</code></pre>

The output is:

<blockquote>
 January 25, 2019 at 3:55:06 AM CST
</blockquote>

If you wanted only the date and in a shorter format, use for example

<pre><code> DateTimeFormatter formatter = DateTimeFormatter
 .ofLocalizedDate(FormatStyle.SHORT).withLocale(Locale.US);
</code></pre>

<blockquote>
 1/25/19
</blockquote>

Note how the snippet allows you to specify time zone, language (locale) and how long or short of a format you want.

<h2>Links</h2>

<ul>
<li><a href="https://docs.oracle.com/javase/tutorial/datetime/" rel="nofollow noreferrer">Oracle tutorial: Date Time</a> explaining how to use java.time.</li>
<li>My example string was taken from <a href="https://stackoverflow.com/questions/54664956/converting-the-timestamp-from-facebook-data-after-downloading-messages-in-json-f">this duplicate question</a></li>
</ul>

blocks|key|1275607|text|ArLiteDTMConv实用程序帮助转换EPOUCH-UNIX日期-时间值，格式为EPOUCH-UNIX-To-Date-format和Vise-Vise。可以将结果设置为变量，然后在脚本中使用该变量，或者在作为参数传递时使用该变量，或者在Window和Linux的任何DB条件中引入该变量。(请通过此链接下载zip文件)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1275608|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

ArLiteDTMConv Utility help converting EPOUCH-UNIX Date-Time values, Form EPOUCH-UNIX-To-Date-format and Vise-Versa. You can set the result to a variable and then use the variable in your script or when passing as parameter or introduce in any DB criteria for both Window and Linux. (Download a zip file on this link)

I have seen this question asked multiple times and none of the answers seem to be what i need.

I have a long type variable which has an epoch time stored in it.

What i want to do is convert it to a String

for example if the epoch time stored was for today the final string would read:

17/03/2012

How would i to this?

Converting Epoch time to date string

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经看到这个问题被问了很多次，似乎没有一个答案是我需要的。我有一个长类型变量，其中存储了一个纪元时间。我想要做的是将它转换成一个字符串例如，如果存储的纪元时间为今天，则最终字符串应为：17/03/2012我该怎么做呢？

问将纪元时间转换为日期字符串
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问将纪元时间转换为日期字符串EN