Spring Framework FAQ: Top Questions

@PropertySource is an annotation used to declare a property file as a source for externalized configuration in a Spring application context.

🗺️ Steps:

1. Create a .properties file with config values.
2. Use @PropertySource to load it.
3. Use @Value to inject properties.

📥 Example:

@Configuration
@PropertySource("classpath:appconfig.properties")
public class AppConfig {

  @Value("${app.name}")
  private String appName;
}

🏆 Expected Output:

app.name property is loaded and injected into the field.

🛠️ Use Cases:

• Loading custom external config files.
• Separating configuration from codebase.