【Spring】Spring IOC&DI：架构旋律中的“依赖交响”与“控制华章”

public class Car {
    //车依赖于车身
    private Framwork framwork;
    public Car(int size) {
        framwork = new Framwork(size);
        System.out.println("Car init....");
    }
    public void run(){
        System.out.println("car run....");
    }
}

public class Framwork {
    private Bottem bottem;
    public Framwork(int size){
        bottem=new Bottem(size);
        System.out.println("framwork init....");
    }
}

public class Tire {
    private int size;
    public Tire(int size){
        this.size=size;
        System.out.println("tire init...");
    }
}

public static void main(String[] args) {
        Tire tire = new Tire(20);
        Bottom bottom = new Bottom(tire);
        Framework framework = new Framework(bottom);
        Car car = new Car(framework);
        car.run();
    }
static class Car {
    private Framework framework;
    public Car(Framework framework) {
        this.framework = framework;
        System.out.println("Car init....");
    }
    public void run() {
        System.out.println("Car run...");
    }
}

@Component
public class BookDao {
    public List<BookInfo> mockData(){
        List<BookInfo> books=new ArrayList<>();
        for (int i = 0; i < 5; i++) {
            BookInfo book = new BookInfo();
            book.setId(i);
            book.setBookName("书籍" + i);
            book.setAuthor("作者" + i);
            book.setCount(i * 5 + 3);
            book.setPrice(new BigDecimal(new Random().nextInt(100)));
            book.setPublish("出版社" + i);
            book.setStatus(1);
            books.add(book);
        }
        return books;
    }
}

@Component //交给spring进行管理
public class BookService {
    @Autowired
    private BookDao bookDao;
    public List<BookInfo> getBookList(){

        List<BookInfo> books=bookDao.mockData();
        for (BookInfo book : books) {
            if (book.getStatus() == 1) {
                book.setStatusCN("可借阅");
            } else {
                book.setStatusCN("不可借阅");
            }
        }
        return books;
    }
}

@RequestMapping("/book")
@RestController
public class BookController {
    @Autowired
    private BookService bookService;
    @RequestMapping("/getList")
    public List<BookInfo> getList() {
        //获取数据
        //交给spring注入依赖

        List<BookInfo> books = bookService.getBookList();
        //处理⻚⾯展⽰
        return books;
    }
}

@Controller
public class UserController {
   public void userController(){
        System.out.println("userController start...");
    }
}

@SpringBootApplication
public class SpringIocDemoApplication {
     public static void main(String[] args) {
     //获取Spring上下⽂对象
     ApplicationContext context = 
     SpringApplication.run(SpringIocDemoApplication.class, args);
     //从Spring上下⽂中获取对象
     UserController userController = context.getBean(UserController.class);
     //使⽤对象
     userController.sayHi();
     }
}

public interface BeanFactory {
    String FACTORY_BEAN_PREFIX = "&";

    Object getBean(String name) throws BeansException;

    <T> T getBean(String name, Class<T> requiredType) throws BeansException;

    Object getBean(String name, Object... args) throws BeansException;

    <T> T getBean(Class<T> requiredType) throws BeansException;

    <T> T getBean(Class<T> requiredType, Object... args) throws BeansException;

  public static void main(String[] args) {
        ApplicationContext context= SpringApplication.run(SpringIocApplication.class, args);
        UserController bean = context.getBean(UserController.class);
        bean.userController();

        UserController bean1 = (UserController) context.getBean("userController");
        bean1.userController();

        UserController bean2 = context.getBean("userController",UserController.class);
        bean2.userController();
}

@Configuration
public class BeanConfig {
    @Bean
    public UserInfo userInfo(){
        return new UserInfo("zhangsan");
    }
}

UserInfo bean = context.getBean("UserInfo.class");
        System.out.println(bean);

@Configuration
public class BeanConfig {
    @Bean
    public UserInfo user1(){
        return new UserInfo("zhangsan");
    }
    //@Primary
    @Bean
    public UserInfo user2(){
        return new UserInfo("lisi");
    }
}

User user1 = (User) context.getBean("user1");
 User user2 = (User) context.getBean("user2")

@Controller
public class UsercontrollerDI {
    @Autowired
    private  UserServiceDI userServicedi;
    //private final UserServiceDI userServiceDI=new UserServiceDI();
    public void start(){
        userServicedi.start();
    }

}

   UsercontrollerDI bean3 = context.getBean(UsercontrollerDI.class);
        bean3.start();

@Controller
public class UserControllerDI2 {
    private UserServiceDI userServiceDI;
    public UserControllerDI2(){

    }
    @Autowired
    public UserControllerDI2(UserServiceDI userServiceDI){
        this.userServiceDI=userServiceDI;
    }

    public void start(){
        userServiceDI.start();
    }
}

@Controller
public class UserSet {
    private UserServiceDI userServiceDI;

    @Autowired
    public void setUserServiceDI(UserServiceDI userServiceDI) {
        this.userServiceDI = userServiceDI;
    }
    public void start(){
        userServiceDI.start();
    }
}

public class BeanConfig {
    @Bean
    public UserInfo userInfo(){
        return new UserInfo("zhangsan");
    }
    //@Primary
    @Bean
    public UserInfo userInfo1(){
        return new UserInfo("lisi");
    }
}

@Autowired
    private UserInfo user;
    public void start(){
        System.out.println(user);
    }

@Bean
    public UserInfo userInfo(){
        return new UserInfo("zhangsan");
    }
    @Primary
    @Bean
    public UserInfo userInfo1(){
        return new UserInfo("lisi");
    }

    @Qualifier("userInfo1")
    @Autowired
    private UserInfo user;

  @Sesource("userInfo1")
    private UserInfo user;