Loading external jar for SpringBoot

In case one builds one Springboot app which requires jar to be provided on runtime, here's the recipe:

1. Change "Main-Class" attribute in jar manifest, here's one example of configuration in gradle:
   

   bootJar {
       manifest {
           attributes(
               "Main-Class": "org.springframework.boot.loader.PropertiesLauncher"
           }
       }
   } 

2. To run the app, add loader.path parameter pointing to the folder location of the jar

   java -Dloader.path=lib/ -jar application.jar

Tips:

1.  Default "Main-Class" in Springboot jar

   "Main-Class": "org.springframework.boot.loader.PropertiesLauncher

2. "Start-Class" attribute in the manifest points to the main class, the class annotated with SpringBootApplication