Section 10

Question 1

How a java class can be used instead of applicationContext.xml file configuration file ?

Answer 1

@Configuration
@ComponentScan(“com.mycompany.springdemo”)
public class SportConfig {

}

Question 2

Create a application using java code configuration.

Output:
Swim workout
Sad fortune service

Answer 2

//Main
public static void main(String[] args) {

    AnnotationConfigApplicationContext container = new AnnotationConfigApplicationContext(SportConfig.class);

    Coach coach = container.getBean("swimCoach", Coach.class);

    System.out.println(coach.getDailyWorkout());

    System.out.println(coach.getDailyFortune());

    container.close();

}

//SadFortuneService

public class SadFortuneService implements FortuneService {

@Override
public String getFortune() {
    return "Sad fortune service";
}

}

//SportConfig

@Configuration
public class SportConfig {

    @Bean
    public FortuneService sadFortuneService() {
        return new SadFortuneService();
    }

    @Bean
    public Coach swimCoach() {
        return new SwimCoach(sadFortuneService());
    }

}

//SwimCoach
public class SwimCoach implements Coach {

private FortuneService fortuneService;

    public SwimCoach(FortuneService fortuneService) {
        this.fortuneService = fortuneService;
    }

@Override
public String getDailyWorkout() {
    return "Swim workout";
}

@Override
public String getDailyFortune() {
    return fortuneService.getFortune();
}

}

Question 3

Incarcati intr-un fisier de configurare java, un fisier sport.properties care contine urmatoarele valori:

email=raduadyi@yahoo.com-loaded-from-a-file
team= a swim team-loaded-from-a-file

Preluati valorile in clasa SwimCoach si afisati valorile in output

Answer 3

//SportConfig file
@Configuration
@PropertySource(“file:src/main/java/com/mycompany/springdemo/sport.properties”)
public class SportConfig {

    @Bean
    public FortuneService sadFortuneService() {
        return new SadFortuneService();
    }

    @Bean
    public Coach swimCoach() {
        return new SwimCoach(sadFortuneService());
    }

}

//Main
public class Main {

public static void main(String[] args) {

    AnnotationConfigApplicationContext container = new AnnotationConfigApplicationContext(SportConfig.class);

    SwimCoach coach = container.getBean("swimCoach", SwimCoach.class);

    System.out.println(coach.getEmail());
    System.out.println(coach.getTeam());

    container.close();
}

}

//SwimCoach class

public class SwimCoach implements Coach {

@Value("${email}")
private String email;
@Value("${team}")
private String team;

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getTeam() {
    return team;
}

public void setTeam(String team) {
    this.team = team;
} }