spring连接access出现错误

错误提示：
Error creating bean with name 'DAOProxy' defined in class path resource [appcontext.xml]: Cannot resolve reference to bean 'transactionManager' while setting bean property 'transactionManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [appcontext.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [appcontext.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Hibernate Dialect must be explicitly set for database: ACCESS

这个是我在xml中的配置
  <bean id="dataSource"
  class="org.apache.commons.dbcp.BasicDataSource"
  destroy-method="close">
  <property name="driverClassName">
  <value>sun.jdbc.odbc.JdbcOdbcDriver</value>
  </property>
  <property name="url">
  <value>jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=D:\\My Documents\\DB_JXC.mdb</value>
  </property>
  <property name="username">
  <value></value><