Log4j.properties in Spring boot

Question

How to load Custom Log4j.properties file in Spring boot

My code in application.properties is here

logging.file=E:/Apps_Tek/apps-webservices-log/apps-         


        

Answer 1

If you want spring boot to use log4j instead of its own default logging (logback) then you have to exclude default logging and include the log4j dependency for spring boot in your pom.xml:

    org.springframework.boot
    spring-boot-starter
    
        
            org.springframework.boot
            spring-boot-starter-logging
        
    


    org.springframework.boot
    spring-boot-starter-log4j
   

that way is going to look for your log4j.properties file located in src/main/resources.

Also if you wish to use properties defined in you application.properties inside the log4j.properties file

for example, you want to have log.file.path defined in your application.properties and use it on log4j.properties

Then you have to define filtering inside your pom.xml:

    src/main/resources/application.properties


    
        src/main/resources
        
            log4j.properties
                 
        true
    

That way you can have:

log4j.appender.file.File=${log.file.path}/${project.artifactId}.log

in your log4j.properties file