本例以Windows, JDK1.8, MySQL5 为基础，演示使用Hibernate5来完成增删查改的操作。

使用的工具及技术

1.Hibernate 5.2.10.Final
2.MySQL 5
3.Eclipse
4.Maven 3

项目结构

Maven配置

使用Maven构建项目，当然应该先添加相关的jar

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<!– hibernate core –>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.10.Final</version>
</dependency>

<!– mysql connection –>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.28</version>
</dependency>

项目代码code

Model

本来主要是对单一对象模型就行数据库的操作，以Student对象为例:

Student.java

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package com.devnp.hibernate.core.model;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;


@Entity
@Table(name = "Student")
public class Student implements Serializable{
	
	/**
	 * @author duliu
	 */
	private static final long serialVersionUID = 1L;

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Basic(optional = false)
	@Column(name = "ID")
	private Long id ;
	
	@Column(name = "NAME")
	private String name ;
	
	@Column(name = "AGE", nullable= false)
	private Integer age ;
	
	@Column(name = "BIRTH_DATE")
	@Temporal(TemporalType.DATE)
	private Date birthDate ;

	public Student() {
		super();
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	public Date getBirthDate() {
		return birthDate;
	}

	public void setBirthDate(Date birthDate) {
		this.birthDate = birthDate;
	}
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Student other = (Student) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", age=" + age
				+ ", birthDate=" + birthDate + "]";
	}
	

}

增删查改

保存对象包数据库 SaveStudent.java

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package com.devnp.hibernate.core.quickstart;

import java.util.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.devnp.hibernate.core.model.Student;
import com.devnp.hibernate.core.util.HibernateProUtil;
import com.devnp.hibernate.core.util.HibernateXmlUtil;

public class SaveStudent {
	
	/**
	 * 演示保存对象到DB
	 * @param args
	 */
	public static void main(String[] args) {
		
		//SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory();
		
		SessionFactory sessionFactory = HibernateProUtil.getSessionFactory();
		
		Session session = sessionFactory.openSession();
		
		Student student = new Student() ;
		
		student.setName("Jack Chen");
		student.setAge(30);
		student.setBirthDate(new Date());
		
		session.save(student);
		
		session.close();
		
		HibernateProUtil.shutdown();
	}
	
	
}

查询保存的数据库 SelectSudent.java

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package com.devnp.hibernate.core.quickstart;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.devnp.hibernate.core.model.Student;
import com.devnp.hibernate.core.util.HibernateXmlUtil;

public class SelectSudent {

	/**
	 * 从DB里面查询出数据
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory() ;
		
		Session session = sessionFactory.openSession() ;
		
		List<Student> list = session.createQuery("from Student").list() ;
		
		session.close();
		
		HibernateXmlUtil.shutdown();
		
		for (Student student : list) {
			System.out.println(student);
		}
	}

}

修改数据 UpdateStudent.java

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package com.devnp.hibernate.core.quickstart;


import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.devnp.hibernate.core.model.Student;
import com.devnp.hibernate.core.util.HibernateXmlUtil;

public class UpdateStudent {

	/**
	 * 查询出表的数据并更新
	 * @param args
	 */
	public static void main(String[] args) {
		
		//updateWithObj();
		updateWithHQL();
	}
	
	/**
	 * 同对象来执行更新
	 */
	public static void updateWithObj(){
		SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory() ;
		
		Session session = sessionFactory.openSession() ;
		
		Transaction tx = session.beginTransaction();	//开启一个事物
		
		String hql = "from Student where id=:id" ;
		
		Student student = (Student) session.createQuery(hql).setParameter("id", 1L).uniqueResult() ;
		
		System.out.println(student);
		
		student.setName("Jack Li");
		
		session.update(student);
		
		tx.commit(); //提交一个事物
		
		session.close();
		
		HibernateXmlUtil.shutdown();
	}
	
	/**
	 * 通过HQL来支持更新
	 */
	public static void updateWithHQL(){
		SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory() ;
		
		Session session = sessionFactory.openSession() ;
		
		Transaction tx = session.beginTransaction();
		
		String hql = "update Student set name=:name where id=:id";
		
		session.createQuery(hql).setParameter("name", "Jack Wang").setParameter("id", 1L).executeUpdate() ;
		
		tx.commit();
		
		session.close();
		
		HibernateXmlUtil.shutdown();
	}
}

删除数据 DeleteStudent.java

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package com.devnp.hibernate.core.quickstart;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.devnp.hibernate.core.model.Student;
import com.devnp.hibernate.core.util.HibernateXmlUtil;

public class DeleteStudent {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		deleteWithObj();
		//deleteWithHQL();
	}
	
	/**
	 * 通过对象来删除
	 */
	public static void deleteWithObj(){
		SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory() ;
		
		Session session = sessionFactory.openSession() ;
		
		Transaction tx = session.beginTransaction();	//开启一个事物
		
		String hql = "from Student where id=:id" ;
		
		Student student = (Student) session.createQuery(hql).setParameter("id", 3L).uniqueResult() ;
		
		System.out.println(student);
		
		session.delete(student);
		
		tx.commit(); //提交一个事物
		
		session.close();
		
		HibernateXmlUtil.shutdown();
	}
	
	/**
	 * 通过执行HQL来删除数据
	 */
	public static  void deleteWithHQL(){
		SessionFactory sessionFactory = HibernateXmlUtil.getSessionFactory() ;
		
		Session session = sessionFactory.openSession() ;
		
		Transaction tx = session.beginTransaction();
		
		String hql = "delete from Student where id=:id";
		
		session.createQuery(hql).setParameter("id", 1L).executeUpdate();
		
		 tx.commit();
		 
		session.close();
		
		HibernateXmlUtil.shutdown();
	}

}

[/code]

相关

关于SessionFactory的创建可以参考：Hibernate5 SessionFactory 的获取

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