Could not load JDBC driver class in spring - spring

Question

I am using spring framework to access data from database.When I run the main class ,I get a error saying java.lang.IllegalStateException: Could not load JDBC driver class [com.microsoft.sqlserver.jdbc.SQLServerD??river].I have added sqljdbc4-2 jar file. App.java is my main class.I have also attached my Spring XML files.Request your help in sorting this issue
package org.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App
{
public static void main( String[] args )
{
ApplicationContext context = new ClassPathXmlApplicationContext("Spring-Module.xml");
System.out.println("inside test");
CustomerDAO customerDAO = (CustomerDAO) context.getBean("customerDAO");
Customer customer = new Customer(1, "mkyong",28);
customerDAO.insert(customer);
Customer customer1 = customerDAO.findByCustomerId(1);
System.out.println(customer1);
}
}
spring-Datasource.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerD‌​river"/>
<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=JAVADB"/>
<property name="username" value="sa"/>
<property name="password" value="dbadmin#234"/>
</bean>
</beans>
spring-Module.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<import resource="Spring-Datasource.xml" />
<import resource="Spring-Customer.xml" />
</beans>
Spring-Customer.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<bean id="customerDAO" class="org.test.JdbcCustomerDAO">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>