探索Java技术栈的定义和重要性

public class MyService {
    private MyDao myDao;

    public void setMyDao(MyDao myDao) {
        this.myDao = myDao;
    }

    public void doSomething() {
        // 使用myDao进行数据库访问
        // ...
    }
}

public class MyDao {
    public void saveData(Data data) {
        // 将数据保存到数据库
        // ...
    }
}

// 在配置文件中定义MyService和MyDao的Bean
<bean id="myService" class="com.example.MyService">
    <property name="myDao" ref="myDao"></property>
</bean>

<bean id="myDao" class="com.example.MyDao"></bean>

public class Student {
    private Long id;
    private String name;
    private int age;

    // Getter和Setter方法省略
}

// 使用Hibernate访问数据库
Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();

Student student = new Student();
student.setName("Alice");
student.setAge(18);
session.save(student);

transaction.commit();
session.close();

@RestController
public class HelloController {
    @RequestMapping("/hello")
    public String hello() {
        return "Hello, World!";
    }
}

// 在启动类中添加注解@EnableAutoConfiguration
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}