One to Many Mapping XML based
A unidirectional One-to-many association on a foreign key is an unusual case, and is not recommended. Consider referring One to Many using Joins.
<set name="studentPhone" cascade="all">
<key column="stud_id" />
<one-to-many class="com.candidjava.hibernate.Phone" />
</set>
Student.hbm.xml
<?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>
<class name="com.candidjava.hibernate.Student" table="student">
<id name="studentId" column="sutid">
<generator class="increment" />
</id>
<property name="studentName" column="stud_name" type="string" />
<set name="studentPhone" cascade="all">
<key column="stud_id" />
<one-to-many class="com.candidjava.hibernate.Phone" />
</set>
</class>
<class name="com.candidjava.hibernate.Phone" table="phone">
<id name="phoneId" column="phone_id">
<generator class="increment" />
</id>
<property name="phoneType" column="phone_type" type="string" />
<property name="phoneNumber" column="phone_number" type="string" />
</class>
</hibernate-mapping>save or inserting record into One to Many mapping
public void insertStudent(Student bk) {
try {
Session s = getSession();
Transaction transaction = s.beginTransaction();
s.save(bk);
transaction.commit();
} catch (HibernateException e) {
e.printStackTrace();
}
}Get or fetch record from One to Many mapping
public Student getStudent(long id) {
Student ls = new Student();
try {
Session s = getSession();
ls = (Student) s.get(Student.class, id);
} catch (HibernateException e) {
System.out.println(e.getMessage());
}
return ls;
}Download
