我有抽象类：
public abstract ClassA {
protected abstract void method1 {...}
另一个实现method1的类ClassB。
XML：
bean id="BaseBean" class="ClassB"
bean id="WorkBean" class="ClassA"
lookup-method="method1" bean="BaseBean"
在测试中：
$RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:test.xml"
public class Test ....
@Autowired
private IClass classA;
当我尝试运行此测试时，我收到错误：
java.lang.IllegalStateException: Failed to load ApplicationContext
....
Caused by: org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'WorkBean'
defined in class path resource [test.xml]:
Instantiation of bean failed; nested exception is
java.lang.NoClassDefFoundError: net/sf/cglib/proxy/CallbackFilter
....
Caused by: java.lang.ClassNotFoundException: net.sf.cglib.proxy.CallbackFilter
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
我该如何解决？