Hibernate映射普通属性、Hibernate中的各种类型

淩亂°似流年 2022-06-16 04:42 202阅读 0赞

<?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
            "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
            "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    
    <hibernate-mapping package="cn.itcast.c_hbm_property">
    	
    	<class name="User" table="user">
    		
    		<id name="id" type="int" column="id">
    			
    			<generator class="native" />
    		</id>
    		
    		<property name="name" type="string" column="name" length="20" not-null="true"/>
    		<property name="age" type="int" column="age_" />
    		<property name="birthday" type="date" column="birthday_" />
    		
    		<property name="desc" type="text" length="5000" column="desc_"/>
    		
    		<property name="photo" type="binary" length="1024" column="photo_"/>
    	</class>
    </hibernate-mapping>

package cn.itcast.c_hbm_property;
    
    import java.util.Arrays;
    import java.util.Date;
    
    /**
     * 实体
     * 
     * @author 风清杨
     * @version V1.0
     */
    public class User {
    	private int id;// 编号
    	private String name;// 姓名
    	private int age;// 年龄
    	private Date birthday;// 生日
    	private String desc;// 一大段说明
    	private byte[] photo;// 头象图片
    
    	public int getId() {
    		return id;
    	}
    
    	public void setId(int id) {
    		this.id = id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public int getAge() {
    		return age;
    	}
    
    	public void setAge(int age) {
    		this.age = age;
    	}
    
    	public Date getBirthday() {
    		return birthday;
    	}
    
    	public void setBirthday(Date birthday) {
    		this.birthday = birthday;
    	}
    
    	public String getDesc() {
    		return desc;
    	}
    
    	public void setDesc(String desc) {
    		this.desc = desc;
    	}
    
    	public byte[] getPhoto() {
    		return photo;
    	}
    
    	public void setPhoto(byte[] photo) {
    		this.photo = photo;
    	}
    
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", name=" + name + ", age=" + age
    				+ ", birthday=" + birthday + ", desc=" + desc + ", photo="
    				+ Arrays.toString(photo) + "]";
    	}
    
    }

package cn.itcast.c_hbm_property;
    
    import java.io.BufferedInputStream;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    import java.util.Date;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.cfg.Configuration;
    import org.junit.Test;
    
    /**
     * 操作类
     * 
     * @author 风清杨
     * @version V1.0
     */
    public class App {
    	private static SessionFactory sessionFactory;
    
    	// 初始化配置文件
    	static {
    		sessionFactory = new Configuration()//
    				.configure()// 读取默认主配置文件
    				.addClass(User.class)//
    				.buildSessionFactory();// 根据配置生成session工厂
    	}
    
    	/**
    	 * 保存
    	 * 
    	 * @throws Exception
    	 */
    	@Test
    	public void testSave() throws Exception {
    		// 读取图片文件
    		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
    				"test.png"));
    		byte[] photo = new byte[bis.available()];
    		bis.read(photo);
    		bis.close();
    
    		// 创建对象
    		User user = new User();
    		user.setName("张三");
    		user.setAge(18);
    		user.setBirthday(new Date());
    		user.setDesc("2016年4月，布鲁克斯在接受韩国媒体“民众之声”采访，被问及“继引进‘爱国者’导弹、‘萨德’系统和宙斯盾系统后，韩国安保防御还需要什么”时，他表示，为加强对朝鲜发射弹道导弹的预警和追踪，同时迅速、全方位地共享相关信息，必须加强韩美两国在弹道导弹防御方面的“合作运营能力”。布鲁克斯还强调，韩方应该加大反导武器的购买力度，提升自身防御能力的同时，也应为韩美同盟反导体系做贡献，这也符合韩美战时作战指挥权转换的条件。");
    		user.setPhoto(photo);
    
    		// 保存?
    		Session session = sessionFactory.openSession();// 打开一个新的Session
    		Transaction tx = session.beginTransaction();// 开始事务
    
    		session.save(user);
    
    		tx.commit();// 提交事务
    		session.close();// 关闭session 释放资源
    	}
    
    	/**
    	 * 获取
    	 * 
    	 * @throws Exception
    	 */
    	@Test
    	public void testGet() throws Exception {
    		Session session = sessionFactory.openSession();
    		Transaction tx = session.beginTransaction();
    
    		User user = (User) session.get(User.class, 1);// 获取?
    		System.out.println(user.getId());
    		System.out.println(user.getName());
    		System.out.println(user.getAge());
    		System.out.println(user.getBirthday());
    		System.out.println(user.getDesc());
    		System.out.println(user.getPhoto());
    		
    		OutputStream os = new FileOutputStream("copy.jpg");
    		os.write(user.getPhoto());
    		os.close();
    
    		tx.commit();
    		session.close();
    	}
    }