@Controller
public class DataController {

    @RequestMapping("studentlist")
    public @ResponseBody
    List<Student> getStudentList() {
        List<Student> studentList = new ArrayList<Student>();
        studentList.add(new Student(2, "A1", "B1", "a@gmail.com", "123456"));
        studentList.add(new Student(3, "A2", "B2", "b@gmail.com", "123456"));
        studentList.add(new Student(4, "A3", "B3", "c@gmail.com", "123456"));

        return studentList;
    }
}

@XmlRootElement
public class Student {

    int id;
    String firstName;
    String lastName;
    String email;
    String mobileNumber;

// Setters & Getters
}

<context:component-scan base-package="com.web.controller" />

    <mvc:annotation-driven />

<bean
    class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json" />
            <entry key="xml" value="text/xml" />
            <entry key="htm" value="text/html" />
        </map>
    </property>
    <property name="defaultContentType" value="text/html" />
      <property name="defaultViews">
    <list>
      <!-- JSON View -->
      <bean
        class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
      </bean>

      <!-- JAXB XML View -->
      <bean class="org.springframework.web.servlet.view.xml.MarshallingView">
        <constructor-arg>
            <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
               <property name="classesToBeBound">
                <list>
                   <value>com.web.domain.Student</value>
                </list>
               </property>
            </bean>
        </constructor-arg>
      </bean>
     </list>
  </property>
  <property name="ignoreAcceptHeader" value="true" />

</bean>