Filename with date in Log4j

Question

I\'m trying to append the current date to the log4j log file. So it would be something like this:

myApp-2011-01-07.log

The thing is that I do not want to us

Answer 1

I think you could just set a system property in code to contain the current date:

static{
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    System.setProperty("current.date", dateFormat.format(new Date()));
}

Then in your log4j.xml file you can use the system property when specifying the log file name in the appender:

ETA: Now that I think about it you may have to setup the system property using a static initializer to make sure the property is set before log4j is configured.