Configure MYSQL to use UTF8 with Spring/Hibernate

I started using MySQL in a project that i started working on,
The project uses Hibernate and Spring
and the problem was that strings end up as question marks in the database

adding the following lines in hibernate.cfg.xml

<property name="connection.characterEncoding">utf8</property>

<property name="connection.useUnicode">true</property>

did not work!

The problem was solved when i added
"?useUnicode=true&characterEncoding=utf-8"
to the connection URL in the application context file

see block:

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost/dbname?useUnicode=true&amp;characterEncoding=utf-8" />
<property name="username" value="user" />
<property name="password" value="pass" />
</bean>