$Proxy25 无法转换为我的类 Spring 框架

我在运行测试时遇到此异常（我正在尝试在 spring 中配置 aop）：

java.lang.ClassCastException: $Proxy25 cannot be cast to path.UserDao
    at com.playence.app.daoTests.TestCreateOntologyDB.testGenerateGlobalAnnotation(TestCreateOntologyDB.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
    at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
    at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
    at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
    at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
    at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)   

UserDao.java

public class UserDao extends AbstractHibernateDAOSupport {

    public UserDao() {
        super();
    }

    /**
     * Insert a new User into the database.
     * 
     * @param user
     */
    public void store(User user) throws DataAccessLayerException {
        super.save(user);
    }

    /**
     * Delete a User from the database.
     * 
     * @param user
     */
    public void delete(User user) throws DataAccessLayerException {
        super.delete(user);
    }

    /**
     * Updates the state of a detached User.
     * 
     * @param user
     */
    public void update(User user) throws DataAccessLayerException {
        super.update(user);
    }

    public User findByID(String id) throws DataAccessLayerException {
        return (User) this.find(User.class, id);

    }

    /**
     * Finds all Users in the database.
     * 
     * @return
     */
    public List findAll() throws DataAccessLayerException {
        return super.findAll(User.class);
    }

弹簧配置文件：applicationContext-dao.xml

<bean id="userDao" class="path.UserDao">
        <property name="sessionFactory">
            <ref bean="sessionFactory" />
        </property>
    </bean>

TestCreateOntologyDB.java

....  
ApplicationContext ctx ;

    public TestCreateOntologyDB() {
        ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
    }

    @Test
    public void testGenerateGlobalAnnotation(){
        UserDao userDao = (UserDao)ctx.getBean("userDao");

...

而且我没有在任何其他配置文件中设置任何 UserDao 附加属性。可能是什么错误？任何帮助，将不胜感激。提前致谢

最后我找到了解决方案：

1. 为将使用aop的类创建接口

2. 在 spring 配置文件中编辑正确路径：

3. 在同一配置文件中添加此行。请注意，在我的情况下，它将影响所有豆子，但它可以只影响一种豆子。

整个主题都在这里http://forum.springsource.org/showthread.php?p=357883 http://forum.springsource.org/showthread.php?p=357883