Log4j：相对于类路径的FileAppender

Question

I managed to properly put a configuration file for log4j and direct to it with this:

URL logProperties =  Program.class.getResource("log.properties");
PropertyConfigurator.configure(logProperties.getFile());

( I think it can do simpler, I read something about the default properties file, but is not the actual topic) Question is: property file is loaded from the class path of the calling method, which is fine, but I have in the config something like:

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=console.log

I was wondering 'console.log' was in the classpath too, but unfortunately it seems to be in the current directory of the executable ( Launching from eclipse, is in the directory parent of the /bin folder). Is there some way to specify a file in the classpath, of course without specifying the full path as log4net does? EDIT by this SO question What is the .NET equivalent of java's System.getProperty("user.dir")? I learn the equivalence of System.getProperty("user.dir") and the .NET

Assembly.GetExecutingAssembly().Location

unfortunately it seems to me that writing ${user.dir}/console.log does not make any differebce ( ie log seems to stay in the current directory, instead of near the executable.

Answer 1

The entry

log4j.appender.R.File=console.log

defines the output of your logging statements ie where the log statements in your code should go. It makes no sense to put this output file in your classpath. Instead (if no other path is specified) the file is written in the working directory (current directory) of your application.