设置日志文件名称以在Log4j中包含当前date
我想为log4j和log4net appender设置日志文件名以获得当前date。 我们正在做每日滚动，但当前的日志文件没有date。 日志文件名称格式是
logname.2008-10-10.log 任何人都知道我这样做的最好方法？
编辑：我忘了提及，我们也想在log4net中做到这一点。 另外任何解决scheme都需要在JBoss中可用。
DailyRollingFileAppender就是你正在寻找的东西。
<appender name="roll" class="org.apache.log4j.DailyRollingFileAppender"> <param name="File" value="application.log" /> <param name="DatePattern" value=".yyyy-MM-dd" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{yyyy-MMM-dd HH:mm:ss,SSS} [%t] %c %x%n %-5p %m%n"/> </layout> </appender>
使用log4j.properties文件，并在我的POM中包含apache-log4j-extras 1.1和log4j 1.2.16
log4j.appender.LOGFILE=org.apache.log4j.rolling.RollingFileAppender log4j.appender.LOGFILE.RollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy log4j.appender.LOGFILE.RollingPolicy.FileNamePattern=/logs/application_%d{yyyy-MM-dd}.log
我99％确定RollingFileAppender / DailyRollingFileAppender，虽然它给你你想要的date滚动function，但没有办法指定当前日志文件也应该使用DatePattern 。
你可能只是简单的子类RollingFileAppender（或DailyRollingFileAppender，我忘了哪个是在log4net中）并修改命名逻辑。
我不知道是否有可能在Java中，但在.NET中RollingFileAppender上的属性StaticLogFileName给你你想要的。 默认值是true。
<staticLogFileName value="false"/>
完整configuration：
<appender name="DefaultFileAppender" type="log4net.Appender.RollingFileAppender"> <file value="application"/> <staticLogFileName value="false"/> <appendToFile value="true" /> <rollingStyle value="Date" /> <datePattern value="yyyy-MM-dd".log"" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" /> </layout> </appender>
".log" 是为了不让dateformat在日志中识别全局date模式'g'。
我已经创build了一个可以做到这一点的appender。 http://stauffer.james.googlepages.com/DateFormatFileAppender.java
/* * Copyright (C) The Apache Software Foundation. All rights reserved. * * This software is published under the terms of the Apache Software * License version 1.1, a copy of which has been included with this * distribution in the LICENSE.txt file. */ package sps.log.log4j; import java.io.IOException; import java.io.File; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.log4j.*; import org.apache.log4j.helpers.LogLog; import org.apache.log4j.spi.LoggingEvent; /** * DateFormatFileAppender is a log4j Appender and extends * {@link FileAppender} so each log is * named based on a date format defined in the File property. * * Sample File: 'logs/'yyyy/MM-MMM/dd-EEE/HH-mm-ss-S'.log' * Makes a file like: logs/2004/04-Apr/13-Tue/09-45-15-937.log * @author James Stauffer */ public class DateFormatFileAppender extends FileAppender { /** * The default constructor does nothing. */ public DateFormatFileAppender() { } /** * Instantiate a <code>DailyRollingFileAppender</code> and open the * file designated by <code>filename</code>. The opened filename will * become the ouput destination for this appender. */ public DateFormatFileAppender (Layout layout, String filename) throws IOException { super(layout, filename, true); } private String fileBackup;//Saves the file pattern private boolean separate = false; public void setFile(String file) { super.setFile(file); this.fileBackup = getFile(); } /** * If true each LoggingEvent causes that file to close and open. * This is useful when the file is a pattern that would often * produce a different filename. */ public void setSeparate(boolean separate) { this.separate = separate; } protected void subAppend(LoggingEvent event) { if(separate) { try {//First reset the file so each new log gets a new file. setFile(getFile(), getAppend(), getBufferedIO(), getBufferSize()); } catch(IOException e) { LogLog.error("Unable to reset fileName."); } } super.subAppend(event); } public synchronized void setFile(String fileName, boolean append, boolean bufferedIO, int bufferSize) throws IOException { SimpleDateFormat sdf = new SimpleDateFormat(fileBackup); String actualFileName = sdf.format(new Date()); makeDirs(actualFileName); super.setFile(actualFileName, append, bufferedIO, bufferSize); } /** * Ensures that all of the directories for the given path exist. * Anything after the last / or \ is assumed to be a filename. */ private void makeDirs (String path) { int indexSlash = path.lastIndexOf("/"); int indexBackSlash = path.lastIndexOf("\\"); int index = Math.max(indexSlash, indexBackSlash); if(index > 0) { String dirs = path.substring(0, index); // LogLog.debug("Making " + dirs); File dir = new File(dirs); if(!dir.exists()) { boolean success = dir.mkdirs(); if(!success) { LogLog.error("Unable to create directories for " + dirs); } } } } }
作为对提到DailyRollingFileAppender的两个答案（对不起，我没有足够的代表直接评论他们，我认为这需要提及）的回应，我会警告说，不幸的是，该类的开发人员已经logging展现出同步和数据丢失，并build议为新部署寻求替代scheme。
DailyRollingFileAppender JavaDoc
这个例子会为每分钟创build一个logging器，如果你想每天更改DatePattern值。
<appender name="ASYNC" class="org.apache.log4j.DailyRollingFileAppender"> <param name="File" value="./applogs/logger.log" /> <param name="Append" value="true" /> <param name="Threshold" value="debug" /> <appendToFile value="true" /> <param name="DatePattern" value="'.'yyyy_MM_dd_HH_mm"/> <rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy"> <param name="fileNamePattern" value="./applogs/logger_%d{ddMMMyyyy HH:mm:ss}.log"/> <param name="rollOver" value="TRUE"/> </rollingPolicy> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d{ddMMMyyyy HH:mm:ss,SSS}^[%X{l4j_mdc_key}]^[%c{1}]^ %-5p %m%n" /> </layout> </appender> <root> <level value="info" /> <appender-ref ref="ASYNC" /> </root>
您可以dynamic设置FileAppender
SimpleLayout layout = new SimpleLayout(); FileAppender appender = new FileAppender(layout,"logname."+new Date().toLocaleString(),false); logger.addAppender(appender);
