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>

"-//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>

@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();

}

}