How can Profiles be used to configure different environments in Spring Boot?

In SpringBoot, you can use either the application.properties or application.yml file to configure properties for different environments, and then specify the configurations for different environments using the @Profile annotation.

For example, different environment properties can be configured in application.properties or application.yml.

# application.properties
spring.profiles.active=dev

# application.yml
spring:
  profiles:
    active: dev

Then use the @Profile annotation in different configuration classes to specify configurations for different environments.

@Configuration
@Profile("dev")
public class DevConfig {
    // dev环境的配置
}

@Configuration
@Profile("prod")
public class ProdConfig {
    // prod环境的配置
}

During startup, you can specify which environment configuration to use by adding the parameter -Dspring.profiles.active=prod. Alternatively, you can set the default environment configuration by defining spring.profiles.active in application.properties or application.yml.