One To Many Mapping List : Relation One to Many « Hibernate « Java





One To Many Mapping List

/////////////////////////////////////////////////////////////////////////
import java.io.Serializable;
import java.util.*;

import org.hibernate.*;
import org.hibernate.cfg.*;
import org.hibernate.criterion.*;
import org.hibernate.event.*;
import org.hibernate.event.def.*;

public class Main {
   public static void main(String[] args) throws Exception {
      HibernateUtil.setup("create table grouptable (id int,name varchar);");    
      HibernateUtil.setup("create table story (id int,info varchar,idx int,parent_id int);");    

      Session session = HibernateUtil.currentSession();

      Group sp = new Group("Group Name");
     
      ArrayList list = new ArrayList();
      list.add(new Story("Story Name 1"));
      list.add(new Story("Story Name 2"));
      sp.setStories(list);

      Transaction transaction = null;

      try {
           transaction = session.beginTransaction();
           session.save(sp);
           transaction.commit();
      } catch (Exception e) { 
           if (transaction != null) {
             transaction.rollback();
             throw e;
           }
      }  finally { 
           session.close();
      }
      HibernateUtil.checkData("select * from grouptable");
      HibernateUtil.checkData("select * from story");      
   }
}




/////////////////////////////////////////////////////////////////////////
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping 
    PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN" 
    "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
    <class name="Group" table="grouptable">
         <id name="id" unsaved-value="0">
            <generator class="increment"/>
        </id>
        
        <list name="stories" cascade="all">
            <key column="parent_id"/>
            <index column="idx"/>
            <one-to-many class="Story"/>
        </list>
        <property name="name" type="string"/>
    </class>
    <class name="Story" 
         table="story">
         <id name="id" unsaved-value="0">
            <generator class="increment"/>
        </id>
          <property name="info"/>
    </class>
</hibernate-mapping>





/////////////////////////////////////////////////////////////////////////




/////////////////////////////////////////////////////////////////////////
import java.util.*;

public class Group {
  private int id;
  private String name;
  private List stories;

  public Group(){
  }

  public Group(String name) {
    this.name = name;
  }

  public void setId(int i) {
    id = i;
  }

  public int getId() {
    return id;
  }

  public void setName(String n) {
    name = n;
  }

  public String getName() {
    return name;
  }

  public void setStories(List l) {
    stories = l;
  }

  public List getStories() {
    return stories;
  }
}



/////////////////////////////////////////////////////////////////////////
import java.util.*;

public class Story {
  private int id;
  private String info;

  public Story(){
  }

  public Story(String info) {
    this.info = info;
  }

  public void setId(int i) {
    id = i;
  }

  public int getId() {
    return id;
  }

  public void setInfo(String n) {
    info = n;
  }

  public String getInfo() {
    return info;
  }
}



/////////////////////////////////////////////////////////////////////////
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">org.hsqldb.jdbcDriver</property>
        <property name="connection.url">jdbc:hsqldb:data/tutorial</property>
        <property name="connection.username">sa</property>
        <property name="connection.password"></property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.HSQLDialect</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Mapping files -->
        <mapping resource="Group.hbm.xml"/>
    </session-factory>
</hibernate-configuration>
           
       










HibernateOneToManyMappingList.zip( 4,578 k)

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