Java 如何在 log4j.properties 中使用系统环境变量？
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How to use system environment variables in log4j.properties?
提问by deepaksharma
I added the system environment value PROJECT_HOME=C:\Program Files\Project
我添加了系统环境值 PROJECT_HOME=C:\Program Files\Project
Now i'm trying to use the system environment value in log4j.properties but didn't set it
现在我试图在 log4j.properties 中使用系统环境值但没有设置它
**log4j.properties**
**log4j.appender.LOGFILE.File="${env.PROJECT_HOME}"/project.log**
Could you please tell me how to set system environment variables in log4j.properties?
你能告诉我如何在 log4j.properties 中设置系统环境变量吗？
Using log4j-1.2.7 version
使用 log4j-1.2.7 版本
回答by Leos Literak
This is supported by EnvironmentLookupin log4j - 2. See examples.
log4j - 2 中的EnvironmentLookup支持此功能。请参阅示例。
Use ${sys:PROJECT_HOME}instead of ${env.PROJECT_HOME}
使用${sys:PROJECT_HOME}代替${env.PROJECT_HOME}
