Student.hbm.xml的配置：
<hibernate-mapping package="org.hibernate.first.model">
<class name="Student">
<composite-id name="pk" class="org.hibernate.first.model.StudentPK">
<key-property name="id"></key-property> <!--主键属性-->
<key-property name="name"></key-property> <!--主键属性-->
</composite-id>
<property name="age" column="age"/> <!--剩余的其他属性-->
</class>
</hibernate-mapping>
主键类的编写：
public class StudentPK implements Serializable{
private int id;
private String name;
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;
}
@Override
public boolean equals(Object o){
if (o instanceof StudentPK) {
StudentPK pk = (StudentPK)o;
if (this.id == pk.getId() && this.name.equals(pk.getName())) {
return true;
}
}
return false;
}
@Override
public int hashCode(){
return this.name.hashCode();
}
}
model类的编写：
public class Student {
private int age;
private StudentPK pk;
public StudentPK getPk() {
return pk;
}
public void setPk(StudentPK pk) {
this.pk = pk;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
测试类的编写：
public class TestStudent {
static Configuration cfg = null;
static SessionFactory sessionFactory = null;
@Before
public void before(){
System.out.println("this is before");
}
@BeforeClass
public static void beforeClass(){
cfg = new AnnotationConfiguration();
sessionFactory = cfg.configure().buildSessionFactory();
}
@Test
public void testStudent(){
Student s = new Student();
StudentPK pk = new StudentPK();
pk.setId(1);
pk.setName("jim");
s.setPk(pk);
//s.setName("jim");
s.setAge(20);
Session session = sessionFactory.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
}
@After
public void after(){
System.out.println("this is After.");
}
@AfterClass
static public void afterClass(){
sessionFactory.close();
}
}
