如何调用 logback.xml 文件中的 application.properties 值？

Question

I want to call local location value(c:/temp) from application.properties file in logback.xml file.

currently i am specify location value in logback.xml itself, it's working fine.

logback.xml

<configuration>

    <property name="LOG_PATTERN" value="%d{yyyy-MM-dd'T'HH:mm:ss.SSSZ} %p %m%n" />
    <property name="APP_LOG_ROOT" value="c:/temp"/>
...
</configuration>

But i want to call value from application.properties file.

application.properties

''' log.location.value = c:/temp '''

what i have to change in logback.xml file.

Thank you.

Answer 1

Include the below snippet in your logback.xml :

<property resource="application.properties" />

This will let you refer properties in a standard way

Example: ${app.name}.

Answer 2

If you have configured my logback-spring.xml as per Spring Boot Documentation, this might be a better solution. Instead of calling the whole application.properties in your logback.xml file, you can refer to a specific property in the application.properties file like this:

<springProperty scope="context" name="APP_TIMEZONE" source="application.timezone" />

Then you can use the springProperty like this: ${APP_TIMEZONE} . This way you can call a specific value in the application.properties file.

<Pattern>
    %d{ISO8601,${APP_TIMEZONE}} [%thread] %-5level %logger{36} - %msg%n
</Pattern>