如何在 jar 清单类路径中指定属性文件的目录？
我想将可执行 jar 所需的所有 .properties 文件放在运行 jar 文件的目录之外的子目录中。目前，我的 MANIFEST.MF 看起来像这样：
Manifest-Version: 1.0
Build-Jdk: 1.6.0_26
Main-Class: MyMainClass
Class-Path: . conf lib/dependency1.jar
如果我将 .properties 文件保存在与 jar 文件相同的目录中，则一切正常。如果我将它们移至 conf 子目录，则找不到它们。我还尝试直接指定 .properties 文件的路径，例如 conf/log4j.properties。
我想做的事情可能吗？
更新：以下是我的可执行 jar 中失败的代码示例：
InputStream stream = getClass().getClassLoader().getResourceAsStream("myproperties.properties");
当 myproperties.properties 位于 conf 子目录中时，此语句返回一个空的输入流。当 log4j.properties 位于 conf 子目录中时，它会输出有关找不到其配置的警告消息：
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.
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.
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尝试使用 org.apache.log4j.PropertyConfigurator.configure(String configFilename)
这可用于指定日志文件所在的位置。
这里有一个例子：
http://logging.apache.org/log4j/1.2/manual.html
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