application.properties

env = pro //dev

@Component
public class DevCondition implements Condition {
    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        Environment environment = context.getEnvironment();
        String env = environment.getProperty("env");
        if("dev".equals(env)){
            return true;
        }
        return false;
    }
}

@Component
public class ProConditon implements Condition {
    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        Environment environment = context.getEnvironment();
        String env = environment.getProperty("env");
        if("pro".equals(env)){
            return true;
        }
        return false;
    }
}

@Configuration
public class MainConfig {

    @Bean
    @Conditional(ProConditon.class)
    public ProDatasource proDatasource(){
        return new ProDatasource();
    }

    @Bean
    @Conditional(DevCondition.class)
    public DevDatasource devDatasource(){
        return new DevDatasource();
    }
}

public class DevDatasource {
    public DevDatasource(){
        System.out.println("=====dev初始化=====");
    }
}

public class ProDatasource {
    public ProDatasource(){
        System.out.println("=====Pro初始化=====");
    }
}