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    <p>The following is a working example from one of my apps. They should all go in the applicationContext or in a .xml loaded by the appContext.</p> <p>The first snippet is the configuration of the datasource, using connection pooling:</p> <pre><code>&lt;bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" p:driverClass="${jdbc.driverClassName}" p:jdbcUrl="${jdbc.url}" p:user="${jdbc.username}" p:password="${jdbc.password}" /&gt; </code></pre> <p>Next up is a Property bean. If you are unsure about any of these settings, please refer to the corresponding APIs.</p> <pre><code>&lt;bean id="hibernateProps" class="org.springframework.beans.factory.config.PropertiesFactoryBean"&gt; &lt;property name="properties"&gt; &lt;props&gt; &lt;prop key="hibernate.hbm2ddl.auto"&gt;update&lt;/prop&gt; &lt;prop key="hibernate.dialect"&gt;org.hibernate.dialect.PostgreSQLDialect&lt;/prop&gt; &lt;prop key="hibernate.show_sql"&gt;false&lt;/prop&gt; &lt;prop key="hibernate.c3p0.minPoolSize"&gt;5&lt;/prop&gt; &lt;prop key="hibernate.c3p0.maxPoolSize"&gt;20&lt;/prop&gt; &lt;prop key="hibernate.c3p0.idleTestPeriod"&gt;300&lt;/prop&gt; &lt;prop key="hibernate.c3p0.timeout"&gt;600&lt;/prop&gt; &lt;prop key="hibernate.c3p0.max_statement"&gt;50&lt;/prop&gt; &lt;prop key="hibernate.c3p0.testConnectionOnCheckout"&gt;false&lt;/prop&gt; &lt;prop key="hibernate.c3p0.preferredTestQuery"&gt;select 1;&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; </code></pre> <p>Now this is the interesting part. Here you wire it all together and tell the sessionfactory where to look for annotated Classes (packagesToScan).</p> <pre><code>&lt;bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" p:dataSource-ref="dataSource" p:packagesToScan="your.package.path" p:hibernateProperties-ref="hibernateProps" /&gt; </code></pre> <p>To make this example work, you should use the following dependencies (given for maven):</p> <pre><code> &lt;dependency&gt; &lt;groupId&gt;javax.persistence&lt;/groupId&gt; &lt;artifactId&gt;persistence-api&lt;/artifactId&gt; &lt;version&gt;1.0&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-webmvc&lt;/artifactId&gt; &lt;version&gt;3.0.2.RELEASE&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-orm&lt;/artifactId&gt; &lt;version&gt;3.0.2.RELEASE&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate&lt;/artifactId&gt; &lt;version&gt;3.2.7.ga&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-annotations&lt;/artifactId&gt; &lt;version&gt;3.3.0.ga&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.hibernate&lt;/groupId&gt; &lt;artifactId&gt;hibernate-commons-annotations&lt;/artifactId&gt; &lt;version&gt;3.3.0.ga&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;c3p0&lt;/groupId&gt; &lt;artifactId&gt;c3p0&lt;/artifactId&gt; &lt;version&gt;0.9.1&lt;/version&gt; &lt;/dependency&gt; </code></pre> <p>When you have setup your project like this, the following @Entity mappings are managed by spring automatically:</p> <pre><code>package your.package.path; import java.io.Serializable; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; import javax.persistence.Transient; @Entity @Table(name = "table_name") public class DomainObject implements Serializable { . . . } </code></pre> <p>If you have any further questions, please let me know.</p> <p>greetings</p>
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    1. CO+1 as you need it more than Bozho :)
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    2. COthank you very much! I have a question about dataSource, you choose "com.mchange.v2.c3p0.ComboPooledDataSource" but in another example i see other datasource class, like "org.springframework.jdbc.datasource.DriverManagerDataSource". How has it been choose? Thank again.
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    3. COEasy: Have a look at the API :p http://static.springsource.org/spring/docs/2.0.x/api/org/springframework/jdbc/datasource/DriverManagerDataSource.html "NOTE: This class is not an actual connection pool; it does not actually pool Connections." So choose c3p0 if you want pooling in your application.
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