<root foo="bar">
  <doo>dat</doo>
</root>

<root foo="bar">
  <doo/>
</root>

<dependency>
  <groupId>com.sun.xml.messaging.saaj</groupId>
  <artifactId>saaj-impl</artifactId>
  <version>1.3.3</version><!-- or higher -->
</dependency>

<bean id="messageFactory" class="org.springframework.ws.soap.saaj.SaajSoapMessageFactory">
  <property name="messageFactory">
    <bean class="com.sun.xml.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1_Impl"/>
  </property>
</bean>