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POAPI or code : Difference between Hibernate 3 and 4?
 

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    <p>I have pasted <strong>Hibernate 3</strong> configuration file , SessionFactory class to configure this config.xml and a bean with JPA annotations. I want to know if I were using <strong>Hibernate 4</strong> then what would have been the changes in the context at code level or very broad differences or advancements in layman language.</p> <blockquote> <p>hibernate.cfg.xml</p> </blockquote> <pre><code> &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"&gt; &lt;hibernate-configuration&gt; &lt;session-factory&gt; &lt;property name="hibernate.connection.driver_class"&gt;oracle.jdbc.driver.OracleDriver&lt;/property&gt; &lt;property name="hibernate.connection.url"&gt;jdbc:oracle:thin:@192.168.2.144:1521:xe&lt;/property&gt; &lt;property name="hibernate.connection.username"&gt;prateek&lt;/property&gt; &lt;property name="connection.password"&gt;prateek&lt;/property&gt; &lt;property name="connection.pool_size"&gt;1&lt;/property&gt; &lt;property name="hibernate.dialect"&gt;org.hibernate.dialect.OracleDialect&lt;/property&gt; &lt;property name="show_sql"&gt;true&lt;/property&gt; &lt;property name="hbm2ddl.auto"&gt;create&lt;/property&gt; &lt;mapping class="com.vaannila.domain.User1" /&gt; &lt;/session-factory&gt; &lt;/hibernate-configuration&gt; </code></pre> <blockquote> <p>Static java class to establish connection (SessionFactory Helper)</p> </blockquote> <pre><code>import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class SessionFactoryHelper { private static final SessionFactory sessionFactory; static { try { /* * Build a SessionFactory object from session-factory configuration * defined in the hibernate.cfg.xml file. In this file we register * the JDBC connection information, connection pool, the hibernate * dialect that we used and the mapping to our hbm.xml file for each * POJO (Plain Old Java Object). * */ sessionFactory = new Configuration().configure().buildSessionFactory(); } catch (Throwable e) { System.err.println("Error in creating SessionFactory object." + e.getMessage()); throw new ExceptionInInitializerError(e); } } /* * A static method for other application to get SessionFactory object * initialized in this helper class. * */ public static SessionFactory getSessionFactory() { return sessionFactory; } } </code></pre> <blockquote> <p>Bean class</p> </blockquote> <pre><code>import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="USER1") public class User1 { private Long id; private String name; private String gender; private String country; private String aboutYou; private Boolean mailingList; @Id @GeneratedValue @Column(name="USER_ID") public Long getId() { return id; } public void setId(Long id) { this.id = id; } @Column(name="USER_NAME") public String getName() { return name; } public void setName(String name) { this.name = name; } @Column(name="USER_GENDER") public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } @Column(name="USER_COUNTRY") public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } @Column(name="USER_ABOUT_YOU") public String getAboutYou() { return aboutYou; } public void setAboutYou(String aboutYou) { this.aboutYou = aboutYou; } @Column(name="USER_MAILING_LIST") public Boolean getMailingList() { return mailingList; } public void setMailingList(Boolean mailingList) { this.mailingList = mailingList; } } </code></pre>
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    1. COPlease don't down vote its an important question I will be requiring the technology change in my project.
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    2. COIt's not constructive to downvote without commenting the reason behind it
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