Section 4

Question 1

Ce problema rezolva Spring ?

Answer 1

In loc sa modificam codul sursa, putem schimba fisierul de configurare applicationContext.xml. Asta inseamna ca aplicatia devine configurabila ( va trebui sa inteleg chestia asta probabil printr-un exemplu )

Question 2

Ce sunt Spring Beans ?

Answer 2

Spring Beans se numesc clasele create de Spring Container

Question 3

create a Spring application using configuration file and dependenci injection ( DI )

Answer 3

//Config file

//
public interface Coach {

public String getDailyWorkout();

public String getDailyFortune();

}

//interface
public interface FortuneService {

public String getFortune();

}

//
public class HappyFortuneService implements FortuneService {

@Override
public String getFortune() {
    return "Today is your lucky day!";
}

}

//
public class BaseballCoach implements Coach {

private FortuneService fortuneService;

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

@Override
public String getDailyWorkout() {
    return "Spend 30 minutes on batting practice";
}

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

}

//public class HelloSpringApp {

public static void main(String[] args) {

        //load spring configuration file
        ClassPathXmlApplicationContext context
                = new ClassPathXmlApplicationContext("file:src/main/java/com/springboot/demo/applicationContext.xml");

        //retrieve bean from spring container
        Coach theCoach = context.getBean("myCoach", Coach.class);
        System.out.println(theCoach.getDailyWorkout());

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

        //  close context
        context.close();

}

}

Question 4

Cum se numesc obiectele create de Spring Container ?

Answer 4

Spring Beans

Question 5

De ce se foloseste pattern-ul Spring?

Answer 5

Se foloseste pentru a nu fi nevoit sa modifici codul sursa, astfel se poate modifica doar fisierul de configurare.

Question 6

Folosind:
- fisierul applicationContext.xml ( care se afla pe location dekstop/Udemy/Section4

• Clasele: HelloSpringApp, TrackCoach

1. Creati un Spring Bean
2. Printati rezultatul metodei getDailyWorkout();
   “Run a hard 5k”

Answer 6

public class HelloSpringApp {

public static void main(String[] args) {

        //load spring configuration file - This is container
        ClassPathXmlApplicationContext context
                = new ClassPathXmlApplicationContext("file:src/main/java/com/springboot/demo/applicationContext.xml");

        //retrieve bean from spring container
        Coach myCoach = context.getBean("myCoach", Coach.class);
        System.out.println(myCoach.getDailyWorkout());

        // close context
        context.close();
    }

}