配置hibernate

Hibernate 主要是ORM,object-relationship-model.对象关系模型。为了熟悉Hibernate，下面简单的做了一个测试。

jar包。

<!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.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url"> jdbc:mysql://localhost:3306/test</property>
        <property name="hibernate.connection.username"> root</property>
        <property name="hibernate.connection.password"> 1234</property>
        
        <property name="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</property>
        <property name="show_sql">true</property>
        <property name="hibernate.hbm2ddl.auto">update</property>
        
        <mapping resource="com/shuanlei/pojo/Student.hbm.xml"/>
        
    </session-factory>
</hibernate-configuration>

public class Department {
    private Integer id;
    private String departDesc;
    
    private Set<Employee> employees= new HashSet<Employee>();

<?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="com.shuanlei.pojo">

    <class name="department" table="t_department" lazy="true">
        
        <id name="id">
            <generator class="native"/>
        </id>
        
        <property name="departDesc" column="departDesc"></property>
            <set name="employees">
                <key>
                    <column name="emp_id"></column>
                </key>
                <one-to-many class="Employee"/>
            </set>
    </class>
    
</hibernate-mapping>

public class Employee {
    private Integer id;
    private String uname;
    
    private Department department;

<?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="com.shuanlei.pojo">

    <class name="Employee" table="t_employee" lazy="true">
        
        <id name="id">
            <generator class="native"/>
        </id>
        
        <property name="uname" column="uname"></property>
        <property name="pwd" 
                column="pwd"/>
                <many-to-one name="department" class="Department">
                    <column name="emp_id"></column>
                </many-to-one>
    </class>
    
</hibernate-mapping>

测试代码

public class TestHiber {

    Session session = HibUtil.getSession();

    public void add(Student stu) {
        try {
            session.getTransaction().begin();

            session.save(stu);
            session.getTransaction().commit();

        } catch (HibernateException e) {
            session.getTransaction().rollback();
            e.printStackTrace();
        } finally {

            session.close();
        }
    }

    public static void main(String[] args) {
        Student stu = new Student();
        stu.setPwd("222");
        stu.setUname("aba");
        TestHiber testHiber = new TestHiber();
        testHiber.add(stu);
    }

}