Hibernate 案例

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.itcast.a_hello">

    <class name="Employee"   table="employee">

        <!-- 主键 ，映射-->

        <id name="empId"   column="id">

            <generator class="native"/>

        </id>

        <!-- 非主键，映射 -->

        <property name="empName"   column="empName"></property>

        <property name="workDate"   column="workDate"></property>

    </class>

</hibernate-mapping>

<!DOCTYPE hibernate-configuration   PUBLIC

    "-//Hibernate/Hibernate Configuration DTD   3.0//EN"

    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!-- 数据库连接配置 -->

        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

        <property name="hibernate.connection.url">jdbc:mysql:///hib_demo</property>

        <property name="hibernate.connection.username">root</property>

        <property name="hibernate.connection.password">root</property>

        <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>

        <property name="hibernate.show_sql">true</property>

        <!-- 加载所有映射 -->

        <mapping resource="cn/itcast/a_hello/Employee.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

public class App {

    @Test

    public void testHello() throws Exception {

        // 对象

        Employee emp = new Employee();

        emp.setEmpName("班长");

        emp.setWorkDate(new Date());

        // 获取加载配置文件的管理类对象

        Configuration config = new Configuration();

        config.configure();  // 默认加载src/hibenrate.cfg.xml文件

        // 创建session的工厂对象

        SessionFactory sf = config.buildSessionFactory();

        // 创建session (代表一个会话，与数据库连接的会话)

        Session session = sf.openSession();

        // 开启事务

        Transaction tx = session.beginTransaction();

        //保存-数据库

        session.save(emp);

        // 提交事务

        tx.commit();

        // 关闭

        session.close();

        sf.close();

    }

}