java 无法使用 log4j DailyRollingFileAppender 将日期附加到文件名
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Unable to append the date to the file name using log4j DailyRollingFileAppender
提问by phani sekhar
Hi I am trying to append the current date to the file name using log4j DailyRollingFileAppender, but its not working. I have used the configuration like below. Please suggest a solution for this
嗨，我正在尝试使用 log4j DailyRollingFileAppender 将当前日期附加到文件名，但它不起作用。我使用了如下配置。请为此提出解决方案
properties
特性
log4j.rootLogger = DEBUG, rollingAppender
log4j.appender.rollingAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.rollingAppender.DatePattern='.'yyyy-MM-dd
log4j.appender.rollingAppender.File=F:/temp/app.log
log4j.appender.rollingAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.rollingAppender.layout.ConversionPattern=[%p] %d %c %M - %m%n
I am expecting the log file as app2014-11-07.log, but its still app.log
我期待日志文件为 app2014-11-07.log，但它仍然是 app.log
采纳答案by Paul Vargas
If you're using log4j 1.x, we strongly recommend that you use org.apache.log4j.rolling.RollingFileAppender1instead of org.apache.log4j.DailyRollingFileAppender(may lose messages, Bug 43374).
如果您使用的是 log4j 1.x，我们强烈建议您使用1而不是（可能会丢失消息，Bug 43374）。org.apache.log4j.rolling.RollingFileAppenderorg.apache.log4j.DailyRollingFileAppender
So the configuration of you appender can be:
所以你 appender 的配置可以是：
log4j.rootLogger = DEBUG, rollingAppender
log4j.appender.rollingAppender=org.apache.log4j.rolling.RollingFileAppender
log4j.appender.rollingAppender.rollingPolicy=org.apache.log4j.rolling.TimeBasedRollingPolicy
log4j.appender.rollingAppender.rollingPolicy.fileNamePattern=F:/temp/app%d{yyyy-MM-dd}.log
log4j.appender.rollingAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.rollingAppender.layout.ConversionPattern=[%p] %d %c %M - %m%n
Notes
笔记
- In that case, you need to add the respective jar (apache-log4j-extras-1.2.17.jar).
- 在这种情况下，您需要添加相应的 jar ( apache-log4j-extras-1.2.17.jar)。
回答by youngzy
DailyRollingFileAppendermeans archiving log files.
For example, today is 2014.11.07, when you first run your app, your log file name would be app.log. Tomorrow, you run the app again,it's log file also named app.log, butyesterday's log file has been changed , maybe like app.log.2014.11.07
DailyRollingFileAppender意味着归档日志文件。
例如，今天是 2014.11.07，当您第一次运行您的应用程序时，您的日志文件名将是app.log. 明天，你再次运行该应用程序，它的日志文件也命名为app.log，但昨天的日志文件已更改，可能像app.log.2014.11.07
Try this :
试试这个 ：
- Change your System Date, to be 2014.11.08
- Run your app, then check out the log-path:
F:/temp/
- 将您的系统日期更改为 2014.11.08
- 运行您的应用程序，然后查看日志路径：
F:/temp/
OR
或者
Change this
改变这个
log4j.appender.rollingAppender.DatePattern='.'yyyy-MM-dd
to
到
log4j.appender.rollingAppender.DatePattern='.'yyyy-MM-dd-HH-mm
That means it will produce a new log file minute-by-minute.
Run it again.
这意味着它将每分钟生成一个新的日志文件。
再次运行它。
回答by Chetan chadha
You can use this configuration:
您可以使用此配置：
log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.DailyRollingFileAppender
#log4j.appender.stdout.layout=org.apache.log4j.HTMLLayout
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%d](%F:%L) - %m%n
#log4j.appender.stdout.File=/usr/tomcat7/webapps/ngp/newgen.log
log4j.appender.stdout.File=c:/logs/DSP.log
#log4j.appender.stdout.DatePattern='.'yyyy-MM-dd
log4j.appender.stdout=org.apache.log4j.RollingFileAppender
log4j.appender.stdout.MaxBackupIndex=1
log4j.appender.stdout.append=false
