Accessing Application Arguments

If you need to access the application arguments that were passed to SpringApplication.run(…), you can inject a org.springframework.boot.ApplicationArguments bean. The ApplicationArguments interface provides access to both the raw String[] arguments as well as parsed option and non-option arguments, as shown in the following example:

Java
Kotlin

import java.util.List;

import org.springframework.boot.ApplicationArguments;
import org.springframework.stereotype.Component;

@Component
public class MyBean {

	public MyBean(ApplicationArguments args) {
		boolean debug = args.containsOption("debug");
		List<String> files = args.getNonOptionArgs();
		if (debug) {
			System.out.println(files);
		}
		// if run with "--debug logfile.txt" prints ["logfile.txt"]
	}

}

import org.springframework.boot.ApplicationArguments
import org.springframework.stereotype.Component

@Component
class MyBean(args: ApplicationArguments) {

	init {
		val debug = args.containsOption("debug")
		val files = args.nonOptionArgs
		if (debug) {
			println(files)
		}
		// if run with "--debug logfile.txt" prints ["logfile.txt"]
	}

}

Spring Boot also registers a CommandLinePropertySource with the Spring Environment. This lets you also inject single application arguments by using the @Value annotation.