外部log4j.xml文件 [英] External log4j.xml file

问题描述

我正在尝试在jar外面的文件系统上运行带有log4j.xml文件的jar，如下所示：

I am trying to run a jar with the log4j.xml file on the file system outside the jar like so:

java -jar MyJarName.jar -cp=/opt/companyName/pathToJar/ log4j.configuration=log4j.xml argToJar1 argToJar2

我也尝试过：

java -jar MyJarName.jar -cp=/opt/companyName/pathToJar/ log4j.configuration=/opt/companyName/pathToJar/log4j.xml argToJar1 argToJar2

log4j.xml是文件与jar（/ opt / companyName / pathToJar /）位于同一目录中，但我仍然收到标准警告消息：

The log4j.xml is file is in the same directory as the jar (/opt/companyName/pathToJar/), yet I still get the standard warning message:

log4j:WARN No appenders could be found for logger (org.apache.axis.i18n.ProjectResourceBundle).
log4j:WARN Please initialize the log4j system properly.

是否可以将配置文件放在jar外面，或者我是否必须将其打包罐？

Is it possible to have the config file outside the jar, or do I have to package it with the jar?

TIA

推荐答案

使用时-jar 切换到启动可执行jar文件，类路径从jar文件的清单中获取。 -cp 开关（如果给定）将被忽略。

When using the -jar switch to launch an executable jar file, the classpath is obtained from the jar file's manifest. The -cp switch, if given, is ignored.

Jeff Storey的答案将是最简单的解决方案。或者，您可以将 Class-Path 属性添加到jar文件的清单。

Jeff Storey's answer is going to be the easiest solution. Alternatively, you could add a Class-Path attribute to the jar file's manifest.

编辑
尝试启用log4j调试，并使 log4j.xml 的路径成为完全限定的URL。例如：

EDIT Try enabling log4j debugging, and making the path to log4j.xml a fully-qualified URL. For example:

java -Dlog4j.debug -Dlog4j.configuration=file:/path/to/log4j.xml -jar ...

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