使用hibernate注解以及几个简单语句

￡神魔★判官ぃ 2022-08-23 03:45 14阅读 0赞

————————————————————-实体类  
package com.gjy.hibernate;

import javax.persistence.Entity;  
import javax.persistence.GeneratedValue;  
import javax.persistence.Id;

@Entity  
public class Teacher \{

private String sex;
    
    
    private String username;
    
    
    @Id
    @GeneratedValue//一定要大写
    private int id;
    
    
    private Integer  age;
    
    
    public int getId() {
        return id;
    }
    
    
    public void setId(int id) {
        this.id = id;
    }
    
    
    
    
    public String getSex() {
        return sex;
    }
    
    
    public void setSex(String sex) {
        this.sex = sex;
    }
    
    
    public String getUsername() {
        return username;
    }
    
    
    public void setUsername(String username) {
        this.username = username;
    }
    
    
    
    
    
    
    public Integer getAge() {
        return age;
    }
    
    
    public void setAge(Integer age) {
        this.age = age;
    }

—————————————————————测试方法

import java.util.List;

import org.hibernate.Criteria;  
import org.hibernate.Session;  
import org.hibernate.SessionFactory;  
import org.hibernate.cfg.Configuration;  
import org.junit.Test;

import com.gjy.hibernate.Teacher;

public class TeacherTest \{

@Test
    public void testTeacher(){
    
    
      //  Teacher teacher = new Teacher();
    
    
       // teacher.setAge(16);
    
    
       // teacher.setSex("femal");
    
    
        //teacher.setUsername("butif");
    
    //Configuration configuration2 = new AnnotationConfiguration();//3.6以前的东西
        Configuration configuration = new Configuration();//hibernate3.6以后这样用
    
    
        SessionFactory factory = configuration.configure().buildSessionFactory();
    
    
        Session session = factory.openSession();
        session.beginTransaction();
    
    
       //session.save(teacher);

// String sql = “from Teacher”;  
//  
// Query query = session.createQuery(sql);  
//  
// List list = query.list();  
//  
// for (Teacher teacher2 : list) \{  
// System.out.println(teacher2.getSex());  
// \}

Criteria criteria = session.createCriteria(Teacher.class);
    
    
        List<Teacher> list = criteria.list();
    
    
        for (Teacher teacher2 : list) {
          System.out.println(teacher2.getSex());
          System.out.println(teacher2.getId());
      }
    
    
        session.getTransaction().commit();
        session.close();
    
    
       factory.close();
    
    
    }

看过有很多版本问题，之前一直在纠结Configuration创建办法，因为我使用的是新版所以AnnotationConfiguration已经过时了，虽然说还是可以用的，但是看见那个划线总是不舒服，因此找到了这个configuration，希望自己切记。