Spring Boot -Dspring.config.location vs --spring.config.location - spring-boot

Question

What's difference between -Dspring.config.location and --spring.config.location for running Spring Boot in command line?
I saw more than one tutorials and stackoverflow answers running command in this way:
java -jar test.jar --spring.config.location=classpath:test/application.properties
However, no matter how I tried, I failed to load the properties file whereas another way succeeded:
java -jar -Dspring.config.location=classpath:test/application.properties test.jar
I am confused with these two settings.
My project is using:
<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
...
</plugin>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>3.0.0</version>
</dependency>
The way I tested:
#SpringBootApplication
public class Test implements CommandLineRunner {
#Autowired
private ConfigurableApplicationContext context;
public static void main(String[] args) throws InterruptedException {
SpringApplication.run(Test.class);
}
#Override
public void run(String... args) throws Exception {
System.out.println(context.getId());
}
}
The first way output is "application". The second way can read my value from my properties file. There are no any errors for both.
Thanks.