blocks|key|2034597|text|使用DailyRollingFileAppender。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2034598|特别是，将其'datePattern‘属性设置为'.'yyyy-MM-dd-HH会导致文件每小时轮换一次。|style|CODE|2034599|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html^0|2|O|0|0|O|G|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@$A|U|B|V|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|W|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Use a <a href="http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html" rel="nofollow noreferrer">DailyRollingFileAppender</a>.

In particular, setting its 'datePattern' property to <code>'.'yyyy-MM-dd-HH</code> would cause file to rotate every hour.

blocks|key|2034778|text|您可能想要使用DailyRollingFileAppender。例如，要每小时滚动它们，您可以使用'.'yyyy-MM-dd-HH的DatePattern。对于log4j.properties文件：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2034779|log4j.appender.myAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.myAppender.DatePattern='.'yyyy-MM-dd-HH
...|code-block|syntax|javascript|2034780|或者对于您的编程配置：|2034781|DailyRollingFileAppender+appender+=+new+DailyRollingFileAppender();
appender.setDatePattern("'.'yyyy-MM-dd-HH");

Logger+root+=+Logger.getRootLogger();
root.addAppender(appender);|2034782|不幸的是，使用DailyRollingFileAppender意味着您无法限制文件大小-如果您在给定的滚动周期内有大量日志，这可能会有问题。|2034783|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html^0|1D|G|7|O|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|17|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

You probably want to use a <a href="http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html" rel="noreferrer">DailyRollingFileAppender</a>. To roll them hourly, for example, you'd use a DatePattern of <code>'.'yyyy-MM-dd-HH</code>. For a log4j.properties file:

<pre><code>log4j.appender.myAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.myAppender.DatePattern='.'yyyy-MM-dd-HH
...
</code></pre>

Or for your programmatic configuration:

<pre><code>DailyRollingFileAppender appender = new DailyRollingFileAppender();
appender.setDatePattern("'.'yyyy-MM-dd-HH");

Logger root = Logger.getRootLogger();
root.addAppender(appender);
</code></pre>

Unfortunately, using a DailyRollingFileAppender means that you can't limit the file size - this could be problematic if you have tons of logs in the given rolled period.

blocks|key|1821312|text|对于任何滚动文件附加器，需要注意的另一件事是确保一次只有一个JVM访问特定的日志文件。这是因为出于性能原因，log4j缓存了日志文件的大小，如果多个JVM访问相同的文件，那么您的“滚动”将会变得不稳定。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1821313|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|$]]

The other thing to be careful of with any rolling file appender is to make sure only one JVM access a particular log file at a time. This is because log4j caches the log file size for performance reasons, and your 'rolling' will get wonky if multiple JVMs access the same files.

blocks|key|1821516|text|您需要使用DailyRollingFileAppender。尽管其名称具有误导性，但可以在中将其配置为以可配置的时间段运行，最长可达几分钟。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1821517|entityMap|0|LINK|mutability|MUTABLE|url|http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html^0|5|O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You need to use the <a href="http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html" rel="nofollow noreferrer">DailyRollingFileAppender</a>. Despite its misleading name it can be configured in a to run at configurable time periods up to minutes.

blocks|key|1821551|text|另外，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1821552|log4j.appender.myAppender=org.apache.log4j.DailyRollingFileAppender
**log4j.appender.myAppender.DatePattern='.'yyyy-MM-dd-HH**|code-block|syntax|javascript|1821553|下面的列表显示了log4j定义的所有日期模式，|1821554|Minutely++'.'yyyy-MM-dd-HH-mm+application.log.2013-02-28-13-54
Hourly+'.'yyyy-MM-dd-HH+application.log.2013-02-28-13
Half-daily+'.'yyyy-MM-dd-a+application.log.2013-02-28-AM+app.log.2013-02-28-PM
Daily+'.'yyyy-MM-dd+application.log.2013-02-28
Weekly+'.'yyyy-ww+application.log.2013-07+app.log.2013-08+
Monthly+'.'yyyy-MM+application.log.2013-01+app.log.2013-02|1821555|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Additionally,

<pre><code>log4j.appender.myAppender=org.apache.log4j.DailyRollingFileAppender
**log4j.appender.myAppender.DatePattern='.'yyyy-MM-dd-HH**
</code></pre>

The following list shows all the date patterns which have defined by log4j,

<pre><code>Minutely '.'yyyy-MM-dd-HH-mm application.log.2013-02-28-13-54
Hourly '.'yyyy-MM-dd-HH application.log.2013-02-28-13
Half-daily '.'yyyy-MM-dd-a application.log.2013-02-28-AM app.log.2013-02-28-PM
Daily '.'yyyy-MM-dd application.log.2013-02-28
Weekly '.'yyyy-ww application.log.2013-07 app.log.2013-08 
Monthly '.'yyyy-MM application.log.2013-01 app.log.2013-02
</code></pre>

I use Log4j with the <code>RollingFileAppender</code> to create a log rotation based on size.

How can I configure it to log to each file for a certain amount of time before rotating?

For example, so that each log file contains one hour of logs, rotating at the top of each hour? 

I configure Log4j programatically in Java using a <code>Properties</code> object (as opposed to a <code>log4j.properties</code> file)

How to rotate log files based on time rather than size in Log4j?

日志文件

Java

我使用带有RollingFileAppender的Log4j来创建基于大小的日志循环。如何将其配置为在旋转之前记录到每个文件一段特定的时间？例如，每个日志文件包含一个小时的日志，并在每个小时的顶部轮换？我在Java语言中使用Properties对象(而不是log4j.properties文件)编程配置Log4j

问如何在Log4j中基于时间而不是大小来旋转日志文件？
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