Java Sample Project for Hibernate One-to-Many Using Join Table XML Mapping

Author: namhaminh

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="lib" path="lib/antlr-2.7.7.jar"/>
+	<classpathentry kind="lib" path="lib/dom4j-1.6.1.jar"/>
+	<classpathentry kind="lib" path="lib/hibernate-commons-annotations-4.0.2.Final.jar"/>
+	<classpathentry kind="lib" path="lib/hibernate-core-4.2.2.Final.jar"/>
+	<classpathentry kind="lib" path="lib/hibernate-jpa-2.0-api-1.0.1.Final.jar"/>
+	<classpathentry kind="lib" path="lib/javassist-3.15.0-GA.jar"/>
+	<classpathentry kind="lib" path="lib/jboss-logging-3.1.0.GA.jar"/>
+	<classpathentry kind="lib" path="lib/jboss-transaction-api_1.1_spec-1.0.1.Final.jar"/>
+	<classpathentry kind="lib" path="lib/mysql-connector-java-5.1.25-bin.jar"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>HibernateOne2ManyJoinTableXMLExample</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

bin/hibernate.cfg.xml

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+<?xml version='1.0' encoding='utf-8'?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>        
+  <session-factory>
+    <!-- Database connection settings -->
+    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
+    <property name="connection.url">jdbc:mysql://localhost:3306/newsdb</property>
+    <property name="connection.username">root</property>
+    <property name="connection.password">secret</property>
+    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
+    <property name="show_sql">true</property>
+    
+    <mapping resource="net/codejava/hibernate/Category.hbm.xml"/>
+    <mapping resource="net/codejava/hibernate/Article.hbm.xml"/>
+      
+  </session-factory>
+</hibernate-configuration>

bin/net/codejava/hibernate/Article.class

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-mapping PUBLIC
+        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+<hibernate-mapping package="net.codejava.hibernate">
+	<class name="Article" table="ARTICLE">
+		<id name="id" column="ARTICLE_ID">
+			<generator class="native"/>
+		</id>
+		<property name="title" column="TITLE" />
+		<property name="description" column="DESCRIPTION" />
+		<property name="keywords" column="KEYWORDS" />
+		<property name="content" column="CONTENT" />
+
+		<join table="CategoryArticle" inverse="true">
+			<key column="ARTICLE_ID"/>
+			<many-to-one name="category" column="CATEGORY_ID" not-null="true"/>
+		</join>
+	</class>	
+</hibernate-mapping>

bin/net/codejava/hibernate/Article.hbm.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-mapping PUBLIC
+        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+<hibernate-mapping package="net.codejava.hibernate">
+	<class name="Category" table="CATEGORY">
+		<id name="id" column="CATEGORY_ID">
+			<generator class="native"/>
+		</id>
+		<property name="name" column="NAME" />
+
+		<set name="articles" table="CategoryArticle" cascade="all">
+			<key column="CATEGORY_ID" not-null="true" />
+			<many-to-many column="ARTICLE_ID" class="Article" unique="true"/>
+		</set>
+	</class>	
+</hibernate-mapping>        

bin/net/codejava/hibernate/ArticlesManager.class

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+CREATE DATABASE `newsdb`;
+
+use newsdb;
+
+CREATE TABLE `category` (
+  `category_id` int(11) NOT NULL AUTO_INCREMENT,
+  `name` varchar(45) NOT NULL,
+  PRIMARY KEY (`category_id`)
+);
+
+
+CREATE TABLE `article` (
+  `article_id` int(11) NOT NULL AUTO_INCREMENT,
+  `title` varchar(70) NOT NULL,
+  `description` varchar(250) NOT NULL,
+  `keywords` varchar(150) NOT NULL,
+  `content` text NOT NULL,
+  PRIMARY KEY (`article_id`)
+);
+
+
+CREATE TABLE `categoryarticle` (
+  `category_id` int(11) NOT NULL,
+  `article_id` int(11) NOT NULL,
+  PRIMARY KEY (`category_id`,`article_id`),
+  KEY `fk_category` (`category_id`),
+  KEY `fk_article` (`article_id`),
+  CONSTRAINT `fk_article` FOREIGN KEY (`article_id`) REFERENCES `article` (`article_id`),
+  CONSTRAINT `fk_category` FOREIGN KEY (`category_id`) REFERENCES `category` (`category_id`)
+);

bin/net/codejava/hibernate/Category.class

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+<?xml version='1.0' encoding='utf-8'?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>        
+  <session-factory>
+    <!-- Database connection settings -->
+    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
+    <property name="connection.url">jdbc:mysql://localhost:3306/newsdb</property>
+    <property name="connection.username">root</property>
+    <property name="connection.password">secret</property>
+    <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
+    <property name="show_sql">true</property>
+    
+    <mapping resource="net/codejava/hibernate/Category.hbm.xml"/>
+    <mapping resource="net/codejava/hibernate/Article.hbm.xml"/>
+      
+  </session-factory>
+</hibernate-configuration>

bin/net/codejava/hibernate/Category.hbm.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-mapping PUBLIC
+        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+<hibernate-mapping package="net.codejava.hibernate">
+	<class name="Article" table="ARTICLE">
+		<id name="id" column="ARTICLE_ID">
+			<generator class="native"/>
+		</id>
+		<property name="title" column="TITLE" />
+		<property name="description" column="DESCRIPTION" />
+		<property name="keywords" column="KEYWORDS" />
+		<property name="content" column="CONTENT" />
+
+		<join table="CategoryArticle" inverse="true">
+			<key column="ARTICLE_ID"/>
+			<many-to-one name="category" column="CATEGORY_ID" not-null="true"/>
+		</join>
+	</class>	
+</hibernate-mapping>

lib/antlr-2.7.7.jar

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+package net.codejava.hibernate;
+
+public class Article {
+	private long id;
+	private String title;
+	private String description;
+	private String keywords;
+	private String content;
+
+	private Category category;
+	
+	public Article() {
+	}
+
+	public Article(String title, String description, String keywords,
+			String content, Category category) {
+		this.title = title;
+		this.description = description;
+		this.keywords = keywords;
+		this.content = content;
+		this.category = category;
+	}
+
+	public long getId() {
+		return id;
+	}
+
+	public void setId(long id) {
+		this.id = id;
+	}
+
+	public String getTitle() {
+		return title;
+	}
+
+	public void setTitle(String title) {
+		this.title = title;
+	}
+
+	public String getDescription() {
+		return description;
+	}
+
+	public void setDescription(String description) {
+		this.description = description;
+	}
+
+	public String getKeywords() {
+		return keywords;
+	}
+
+	public void setKeywords(String keywords) {
+		this.keywords = keywords;
+	}
+
+	public String getContent() {
+		return content;
+	}
+
+	public void setContent(String content) {
+		this.content = content;
+	}
+
+	public Category getCategory() {
+		return category;
+	}
+
+	public void setCategory(Category category) {
+		this.category = category;
+	}
+
+}

lib/dom4j-1.6.1.jar

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+package net.codejava.hibernate;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+import org.hibernate.service.ServiceRegistry;
+import org.hibernate.service.ServiceRegistryBuilder;
+
+/**
+ * This program demonstrates how to use Hibernate framework to manage 
+ * a one-to-many association on a join table.
+ * @author www.codejava.net
+ *
+ */
+public class ArticlesManager {
+
+	public static void main(String[] args) {
+		// loads configuration and mappings
+		Configuration configuration = new Configuration().configure();
+		ServiceRegistryBuilder registry = new ServiceRegistryBuilder();
+		registry.applySettings(configuration.getProperties());
+		ServiceRegistry serviceRegistry = registry.buildServiceRegistry();
+
+		// builds a session factory from the service registry
+		SessionFactory sessionFactory = configuration
+				.buildSessionFactory(serviceRegistry);
+
+		// obtains the session
+		Session session = sessionFactory.openSession();
+		session.beginTransaction();
+
+		Category category = new Category("Hibernate Framework");
+
+		Article articleOne = new Article("One-to-One Mapping",
+				"One-to-One XML Mapping Tutorial", "Hibernate,One-to-One",
+				"Content of One-to-One XML Mapping Tutorial", category);
+		Article articleTwo = new Article("One-to-Many Mapping",
+				"One-to-Many XML Mapping Tutorial", "Hibernate,One-to-Many",
+				"Content of One-to-Many XML Mapping Tutorial", category);
+		Article articleThree = new Article("Many-to-Many Mapping",
+				"Many-to-Many XML Mapping Tutorial", "Hibernate,Many-to-Many",
+				"Content of Many-to-Many XML Mapping Tutorial",	category);
+
+		Set<Article> articles = new HashSet<Article>();
+		articles.add(articleOne);
+		articles.add(articleTwo);
+		articles.add(articleThree);
+
+		category.setArticles(articles);
+
+		session.save(category);
+
+		session.getTransaction().commit();
+		session.close();
+	}
+
+}

lib/hibernate-commons-annotations-4.0.2.Final.jar

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-mapping PUBLIC
+        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+<hibernate-mapping package="net.codejava.hibernate">
+	<class name="Category" table="CATEGORY">
+		<id name="id" column="CATEGORY_ID">
+			<generator class="native"/>
+		</id>
+		<property name="name" column="NAME" />
+
+		<set name="articles" table="CategoryArticle" cascade="all">
+			<key column="CATEGORY_ID" not-null="true" />
+			<many-to-many column="ARTICLE_ID" class="Article" unique="true"/>
+		</set>
+	</class>	
+</hibernate-mapping>        

lib/hibernate-core-4.2.2.Final.jar

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+package net.codejava.hibernate;
+
+import java.util.Set;
+
+public class Category {
+
+	private long id;
+	private String name;
+
+	private Set<Article> articles;
+	
+	public Category() {
+	}
+	
+	public Category(String name) {
+		this.name = name;
+	}
+
+	public long getId() {
+		return id;
+	}
+
+	public void setId(long id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public Set<Article> getArticles() {
+		return articles;
+	}
+
+	public void setArticles(Set<Article> articles) {
+		this.articles = articles;
+	}
+
+}