如何在jar清单类路径中为属性文件指定目录？

Question

I'd like to put all of the .properties files that my executable jar requires in a sub-directory off of the directory from which I will run the jar file. Currently, my MANIFEST.MF looks something like this:

Manifest-Version: 1.0
Build-Jdk: 1.6.0_26
Main-Class: MyMainClass
Class-Path: . conf lib/dependency1.jar

If I keep my .properties files in the same directory as the jar file, everything works fine. If I move them to the conf sub-directory, they are not found. I've also tried specifying the paths to the .properties files directly, such as conf/log4j.properties .

Is what I'm trying to do possible?

Update: Here's an example of code in my executable jar that fails:

InputStream stream = getClass().getClassLoader().getResourceAsStream("myproperties.properties");

When myproperties.properties is in the conf sub-directory, this statement returns a null InputStream. When log4j.properties is in the conf sub-directory, it outputs its warning message about not finding its configuration:

log4j:WARN No appenders could be found for logger (MyMainClass).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Answer 1

Try using org.apache.log4j.PropertyConfigurator.configure(String configFilename)

This can be used to specify where your log file is located.

There is an example of that here: http://logging.apache.org/log4j/1.2/manual.html