Hibernate one to Many Example

Hibernate one Many Example

hibernate one-to-many



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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
    Anish
-->
<hibernate-mapping>
    <class name="session.Student" table="STUDENT" schema="RUBY">
        <id name="id" type="java.lang.Long">
            <column name="ID" precision="22" scale="0" />
            <generator class="assigned" />
        </id>
        <property name="name" type="java.lang.String">
            <column name="NAME" length="10" />
        </property>
        <set name="subjects" inverse="true">
            <key>
                <column name="EMPID" precision="22" scale="0" />
            </key>
            <one-to-many class="session.Subject" />
        </set>
    </class>
</hibernate-mapping>



<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
    ANish
-->
<hibernate-mapping>
    <class name="session.Subject" table="SUBJECT" schema="RUBY">
        <id name="id" type="java.lang.Long">
            <column name="ID" precision="22" scale="0" />
            <generator class="assigned" />
        </id>
        <many-to-one cascade="save-update" name="student" class="session.Student" fetch="select">
            <column name="EMPID" precision="22" scale="0" />
        </many-to-one>
        <property name="name" type="java.lang.String">
            <column name="NAME" length="10" />
        </property>
    </class>
</hibernate-mapping>

 

 
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Relation One to Many  Hibernate  Java
hibernate one-to-many
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hibernate one-to-many cascade
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hibernate one-to-one
hibernate many-to-many
hibernate many to one cascade
ANish



public class Student implements java.io.Serializable {

// Fields

private Long id;
private String name;
private Set subjects = new HashSet(0);

// Constructors

/** default constructor */
public Student() {
}

/** minimal constructor */
public Student(Long id) {
this.id = id;
}

/** full constructor */
public Student(Long id, String name, Set subjects) {
this.id = id;
this.name = name;
this.subjects = subjects;
}

// Property accessors

public Long getId() {
return this.id;
}

public void setId(Long id) {
this.id = id;
}

public String getName() {
return this.name;
}

public void setName(String name) {
this.name = name;
}

public Set getSubjects() {
return this.subjects;
}

public void setSubjects(Set subjects) {
this.subjects = subjects;
}

}


public class Subject implements java.io.Serializable {

// Fields

private Long id;
private Student student;
private String name;

// Constructors

/** default constructor */
public Subject() {
}

/** minimal constructor */
public Subject(Long id) {
this.id = id;
}

/** full constructor */
public Subject(Long id, Student student, String name) {
this.id = id;
this.student = student;
this.name = name;
}

// Property accessors

public Long getId() {
return this.id;
}

public void setId(Long id) {
this.id = id;
}

public Student getStudent() {
return this.student;
}

public void setStudent(Student student) {
this.student = student;
}

public String getName() {
return this.name;
}

public void setName(String name) {
this.name = name;
}



}