Java 在 log4j 中使用 FileNamePattern、RollingFileAppender
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Using FileNamePattern, RollingFileAppender in log4j
提问by jasonline
I have a log file named app.log. When it rolls over (I'm setting it to every minute just for testing purposes), I would like it to be renamed to app-YYYY-MM-dd_HH-mm.logbut it's not working. Below is my log4j settings:
我有一个名为 app.log 的日志文件。当它滚动时（我将它设置为每分钟只是为了测试目的），我希望它被重命名，app-YYYY-MM-dd_HH-mm.log但它不起作用。以下是我的 log4j 设置：
log4j.appender.myLog=org.apache.log4j.RollingFileAppender
log4j.appender.myLog.rollingPolicy=TimeBasedRollingPolicy
log4j.appender.myLog.File=logs/app.log
log4j.appender.myLog.rollingPolicy.FileNamePattern=logs/app-%d{yyyy-MM-dd_HH-mm}.log
log4j.appender.myLog.Append=true
log4j.appender.myLog.layout=org.apache.log4j.PatternLayout
log4j.appender.myLog.layout.ConversionPattern=%d %-5p [%t] %-17c{2} (%13F:%L) %3x - %m%n
Does anyone know what's the problem? During the rollover, it just renames the file into app.log.1.
有谁知道是什么问题？在翻转期间，它只是将文件重命名为app.log.1.
回答by Martin Algesten
Try removing logs/from both .Fileand .FileNamePattern. I'm reading the code, and it looks like it should work, but it may be worth reducing the problem.
尝试logs/从.File和 中删除.FileNamePattern。我正在阅读代码，看起来它应该可以工作，但可能值得减少这个问题。
回答by darioo
I assume you're using justlog4j. Version 1.2.16 is the newest one. rollingPolicydoesn't exist in its source code; only in log4j.dtdfile for xml based configuration.
我假设您只使用log4j。版本 1.2.16 是最新版本。rollingPolicy不存在于其源代码中；仅在log4j.dtd基于 xml 的配置文件中。
The only way you'll get what you want to work is to download Apache extras companion for log4j.
您将获得您想要的工作的唯一方法是下载log4j 的 Apache extras 伴侣。
Eventually if you don't want to use extras You can workaround using:
最终，如果您不想使用附加功能，您可以使用以下方法解决：
org.apache.log4j.DailyRollingFileAppender
org.apache.log4j.DailyRollingFileAppender
Minus of this path is that your log files won't be gzipped.
这条路径的缺点是您的日志文件不会被压缩。
回答by Paul
According to the log4j wiki:
根据log4j wiki：
Note that TimeBasedRollingPolicy can only be configured with xml, not log4j.properties
注意TimeBasedRollingPolicy只能配置xml，不能配置log4j.properties
The APIdoesn't mention that, but perhaps that's the problem?
API没有提到这一点，但也许这就是问题所在？
回答by karu
Download log4jextras jar file and put it into lib folder.
Also add the rollingPolicytag a follows:
下载log4jextras jar 文件并将其放入 lib 文件夹。还要添加rollingPolicy标签 a 如下：
<rollingPolicy class="org.apache.log4j.rolling.TimeBasedRollingPolicy">
<param name="FileNamePattern"
value="D:/Apps/Enterprise_domain/diagnostics/logs/diagnostics.% d{yyyy-MM-dd_HH-mm}.log"/>
</rollingPolicy>
回答by Ahmad Nadeem
Please check you have included apache-log4j-extras.jarand using log4j-1.2.16.jaror at least above 2.17 version. here is sample log4j.properties which can be used.
请检查您是否包含apache-log4j-extras.jar并使用log4j-1.2.16.jar或至少高于 2.17 版本。这是可以使用的示例 log4j.properties。
#Worked with 2.17 version
#make log files rotate every minute or hour and zip old rotated logs
log4j.rootLogger=INFO, loggerId
log4j.appender.loggerId=org.apache.log4j.rolling.RollingFileAppender
log4j.appender.loggerId.rollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy
log4j.appender.loggerId.rollingPolicy.ActiveFileName=worker.log
log4j.appender.loggerId.rollingPolicy.FileNamePattern=worker-.%d{yyyyMMdd-HHmm}.log.gz
log4j.appender.loggerId.layout=org.apache.log4j.PatternLayout
log4j.appender.loggerId.layout.ConversionPattern=%d [%t] %-5p (%F:%L) - %m%n
for more details on properties please check here
有关属性的更多详细信息，请查看此处
回答by user9880478
System.out.println("Loggers initiallization process started..");
if(objApploger == null){
objApploger = new AppLogger();
String loglevel="ERROR";
String logPath="E:\Examples\applicationLogs";
String logMaxSize="50000";//in kbs
int nmaxbackupIndex=20;
String conversionPattern="%d{yyyy-MM-dd HH:mm:ss:SSS} %-5p :: %m%n";
RollingFileAppender RFAppender= null;
RFLog =Logger.getLogger("Log");
RFLog.setLevel(Level.toLevel(loglevel));
Calendar cal= Calendar.getInstance();
String timeFrame=cal.get(5)+"_"+(cal.get(2)+1)+"_"+cal.get(1);
logPath=logPath+"TestLog_"+timeFrame+".log";
RFAppender = new RollingFileAppender(new PatternLayout(conversionPattern),logPath);
RFAppender.setMaxBackupIndex(nmaxbackupIndex);
RFAppender.setMaxFileSize(logMaxSize);
RFLog.addAppender(RFAppender);
System.out.println("Loggers initiallization process completed..");
}
