问题描述
我想在application.properties中定义高级文件记录，以方便利用我的log4j2.xml文件配置.我的log4j2配置本身工作正常，但是我希望控制日志记录级别以及来自application.properties文件的日志文件和路径信息.我在应用程序的pom文件中具有spring-boot-starter-log4j2依赖项.
I want to define high-level file logging in application.properties as a convenience to leverage my log4j2.xml file configuration. By itself my log4j2 config is working fine, however I was hoping to control logging levels and log file and path info from the application.properties file. I have the spring-boot-starter-log4j2 dependency in the application's pom file.
在log4j2.xml中，我具有以下属性之一
In log4j2.xml I have as one of the properties
<Property name="LOG_FILE">${LOG-DIR}/test.log</Property>
，其中LOG-DIR是在同一文件的另一个(先前)属性中定义的.在我的application.properties文件中，
, where LOG-DIR is defined in another (previous) property in the same file. In my application.properties file, I have
logging.file=LOG_FILE
作为属性，加上一些级别属性，例如
as a property, plus several level properties such as
logging.level.org.springframework.web=DEBUG
我的application.properties文件中定义的与日志相关的所有属性
都无法构建相应的日志文件.再次，当我简单地单独使用log4j2.xml时，它可以很好地工作，但是想要利用application.properties的便利性来进行日志记录配置.
none of these log-related properties as defined in my application.properties file are working to build the corresponding log file. Again, when I simply use log4j2.xml by itself it works fine, but wanted to take advantage of the convenience of application.properties for logging configuration.
任何对我做错事情的见解都将受到赞赏.谢谢
Any insights into what I am doing wrong are greatly appreciated. thank you
推荐答案
如果我正确地理解了您的问题，那么您正在看的是 log4j2 的属性替换功能.
If I understood your question right, you are looking at Property Substitution feature of log4j2.
您可以在 application.properties 文件中定义日志记录属性，如下所示:
You can define logging property in application.properties file like below:
log.file.path=/myDir/logpath
然后在 log4j2.xml 中定义为 Property 的属性查找:
And then the property(s) lookup defined as Property in log4j2.xml:
<Configuration>
<Properties>
<property name="LOG_FILE">${bundle:application:log.file.path}</property>
</Properties>
现在，所有属性都可以使用 $ {propertyName} 表示法在同一 log4j2.xml 中引用，该表示法最终指向 application.properties 中的值代码>文件.
Now all the property can be referred in same log4j2.xml with ${propertyName} notation, which eventually points to values from application.properties file.
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