在hibernate中创建一个java项目，加入hibernate支持。在创建java项目中，生成一个student类，该属性包括（id name gender number age description）。完成四个方法，分别是，savedelete update find。用于对学生对象的crud操作，在main方法中调用4个方法。

好的，我可以提供一个示例代码，展示如何在Hibernate中创建Java项目，并实现对Student对象的CRUD操作。

首先，您需要按照上面提到的步骤创建Java项目，并添加Hibernate依赖。然后，您需要在项目中创建Student类，并使用Hibernate注解指定映射关系。代码如下：

@Entity
@Table(name = "students")
public class Student {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    @Column(name = "gender")
    private String gender;

    @Column(name = "number")
    private String number;

    @Column(name = "age")
    private Integer age;

    @Column(name = "description")
    private String description;

    // getters and setters
}

接下来，您需要创建一个名为“HibernateUtil”的类，用于创建和管理Hibernate SessionFactory。代码如下：

public class HibernateUtil {
    private static final SessionFactory sessionFactory = buildSessionFactory();

    private static SessionFactory buildSessionFactory() {
        try {
            Configuration configuration = new Configuration();
            configuration.configure();

            StandardServiceRegistryBuilder serviceRegistryBuilder = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties());

            return configuration.buildSessionFactory(serviceRegistryBuilder.build());
        } catch (Exception e) {
            System.err.println("SessionFactory creation failed." + e);
            throw new ExceptionInInitializerError(e);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }
}

然后，您需要创建一个名为“StudentDAO”的类，用于执行CRUD操作。代码如下：

public class StudentDAO {
    private SessionFactory sessionFactory;

    public StudentDAO(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    public void save(Student student) {
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();
        session.save(student);
        session.getTransaction().commit();
    }

    public void update(Student student) {
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();
        session.update(student);
        session.getTransaction().commit();
    }

    public void delete(Student student) {
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();
        session.delete(student);
        session.getTransaction().commit();
    }

    public Student findById(Long id) {
        Session session = sessionFactory.getCurrentSession();
        session.beginTransaction();
        Student student = session.get(Student.class, id);
        session.getTransaction().commit();
        return student;
    }
}

最后，您可以在main方法中调用四个方法，如下所示：

public static void main(String[] args) {
    SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
    StudentDAO studentDAO = new StudentDAO(sessionFactory);

    // create a new student
    Student student = new Student();
    student.setName("John Doe");
    student.setGender("Male");
    student.setNumber("123456789");
    student.setAge(20);
    student.setDescription("A good student");

    studentDAO.save(student);

    // find the student by id
    Student foundStudent = studentDAO.findById(student.getId());
    System.out.println(foundStudent.getName());

    // update the student
    foundStudent.setName("Jane Doe");
    studentDAO.update(foundStudent);

    // delete the student
    studentDAO.delete(foundStudent);
}

这样，就完成了对Student对象的CRUD操作。希望这个示例对您有所帮助！