What is IOC Scope?

Property

  • Variable setting value in spring.
  • The Environment role is property source setting and get property value.

Property Priority

  • ServletConfig parameter
  • ServletContext parameter
  • JNDI (java:comp/env)
  • JVM system property (-Dkey=”value)
  • JVM system environment value

Create properties file like below.

base

And write annotation ‘@PropertySource(“classpath:/app.properties”)’.

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@SpringBootApplication
@PropertySource("classpath:/app.properties")
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Then can get anywhere for example ‘environment.getProperty(“app.about”)’.

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@Component
public class ProRunner implements ApplicationRunner {

    @Autowired
    ApplicationContext ctx;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        Environment environment = ctx.getEnvironment();

        System.out.println(environment.getProperty("app.about"));
    }
}

The expected result is like below.

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spring