log4j - 每次运行一个文件

Question

I have found a similar question for log4net( log4net one file per run ), but i am struggling to convert this to log4j.properties file format. The patters just don't get applied:

log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File = logs/log-%d{yy/MM/dd HH:mm:ss}.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
...

I see what is wrong here, but I don't know how to fix it.

Answer 1

You need to use RollingFileAppender with the RollingStyle set to Date. So the config would look something like

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.RollingStyle=Date
log4j.appender.file.DatePattern=yy-MM-dd_HH-mm-ss
log4j.appender.file.StaticLogFileName=false
log4j.appender.file.File=logs/log.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n

I don't think it is possible to use slashes or colons in the date pattern as these are not characters that can occur in a file name.

Note that this will actually create a new log file every second, which doesn't match what you've asked for in the title of your question. If you really want a new log file for every run then you should set the RollingStyle to Once. But in this case your file name will not contain a date pattern.

Answer 2

May be this is what you are asking.

http://veerasundar.com/blog/2009/08/how-to-create-a-new-log-file-for-each-time-the-application-runs/

courtesy : Is it possible to configure log4j to create a new file with every run of the application?

Answer 3

Try RollingFileAppender

log4j.rootLogger=debug, stdout, file

log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=C:\\\\log4j-application.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n