一个Hibernate实例（单表操作）

看代码：

1.先看数据库

create database hibernate
go
use hibernate
go 
create table person
(
id int identity primary key,
name varchar(20),
password varchar(10),
sex varchar(5),	
email varchar(30)
)
go

 2.实体类

 

package entity;

public class Person {
	private int id;
	private String name;
	private String password;
	private String sex;
	private String email;

	@Override
	public String toString() {
		return this.id + "   " + this.name + "    " + this.password + "  "
				+ this.sex + "   " + this.email;
	}

	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 String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}
}

 

3.实体类映射

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="entity.Person" table="person"> 
        <id name="id" type="int"> 
            <column name="id" length="30" /> 
            <generator class="identity" /> 
        </id> 
        <property name="name" type="string"> 
            <column name="name" length="20" not-null="true" /> 
        </property> 
        <property name="password" type="string"> 
            <column name="password" length="20" not-null="true" /> 
        </property> 
        <property name="sex" type="string"> 
            <column name="sex" length="2" /> 
        </property> 
        <property name="email" type="string"> 
            <column name="email" length="30" /> 
        </property> 
    </class> 
</hibernate-mapping>

 

4.数据库连接配置文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
    <property name="hibernate.connection.url">jdbc:sqlserver://localhost\MSSQLSERVER:1433;databaseName=hibernate</property>
    <property name="hibernate.connection.username">sa</property>
    <property name="hibernate.connection.password">123</property>
    <property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>

    <!-- <property name="hibernate.show_sql">true</property> 是否显示sql语句-->
    <!-- <property name="hibernate.hbm2ddl.auto">update</property> -->
    
    
    <mapping resource="entity/Person.hbm.xml"/>
    <!-- <mapping resource="onetomany/Teacher.hbm.xml"/>  -->
    <!-- <mapping resource="onetomany/StuInfo.hbm.xml"/>  -->
  </session-factory>
</hibernate-configuration>

 

5、操作类

package entity;

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

/**
 * Hibernate 实现增、删、查、改
 * 
 * @author 陈杰
 */
// 具体操作hibernate的操作
// 增加、删除、修改，按ID查询，模糊查询、全部查询的操作
public class PersonOperate {
	// 在hibernate中，所有的操作都是通过Session完成

	private Session session = null;

	// 在构造方法中完成实例化session对象

	public PersonOperate() {
		// 找到hibernate配置
		Configuration config = new Configuration().configure();
		// 从配置中取得SessionFactory
		SessionFactory factory = config.buildSessionFactory();
		// 从SessionFactory中取出一个session
		this.session = factory.openSession();
	}

	// 所有的操作都是通过session进行的
	// 向数据库中增加数据

	public void insert(Person p) {
		// 开始事务
		Transaction tran = this.session.beginTransaction();
		// 执行程序
		this.session.save(p);
		// 提交事务
		tran.commit();
	}

	public void delete(Person p) {
		// 开始事务
		Transaction tran = this.session.beginTransaction();

		Person per = (Person) this.session.get(Person.class, p.getId());
		// 执行程序
		this.session.delete(per);
		// 提交事务
		tran.commit();
	}

	public void update(Person p) {
		// 开始事务
		Transaction tran = this.session.beginTransaction();
		// 执行程序
		this.session.update(p);
		// 提交事务
		tran.commit();
	}

	public void find(Person p) {
		// 开始事务
		Transaction tran = this.session.beginTransaction();
		// 执行程序
		Person per = (Person) this.session.get(Person.class, p.getId());
		// 提交事务
		tran.commit();
		// 打印结果
		System.out.println(per);
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 生成POJO类实例化对象
		Person p = new Person();
		p.setId(2);
		p.setName("用户名");
		p.setPassword("53");
		p.setSex("男");
		p.setEmail("[e-mail]");
		// 实例化PersonOperate对象
		PersonOperate po = new PersonOperate();
		// po.insert(p);
		po.find(p);
	}
}