由于弹簧注入的代理副作用，AOP无法在弹簧中捕获DAO异常

<bean id=\"DBExceptions\" class=\"com.dao.impl.DAOExceptionTranslator\" />
    <aop:config>
        <aop:aspect id=\"dbExceptionsAspect\" ref=\"DBExceptions\">
            <aop:after-throwing throwing=\"ex\"
                pointcut=\"execution(* com.dao.impl.*.*(*))\" method=\"doDAOActions\" />
        </aop:aspect>
    </aop:config>

@Transactional
public class UserDAOImpl extends GenericDAOImpl implements UserDAO {

    @PersistenceContext
    protected EntityManager entityManager;

    @Override
    public User findUserByUsername(String username) throws DAOException {
        Query query = entityManager
                .createQuery(\"select u from User u where u.username=:username\");
        query.setParameter(\"username\", username);

        Object userObject = query.getSingleResult();

        return (User) userObject;
    }

private UserDAO userDAO;
public User getUserById(int id) throws UserServiceException {
        try {
            Object user = userDAO.findById(User.class, id);
...

UserDAOImpl.findUserByUsername(String) line: 23 
    NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]  
    NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39  
    DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25  
    Method.invoke(Object, Object...) line: 597  
    AopUtils.invokeJoinpointUsingReflection(Object, Method, Object[]) line: 309 
    ReflectiveMethodInvocation.invokeJoinpoint() line: 183  
    ReflectiveMethodInvocation.proceed() line: 150  
    AspectJAfterThrowingAdvice.invoke(MethodInvocation) line: 55    
    ReflectiveMethodInvocation.proceed() line: 172  
    TransactionInterceptor.invoke(MethodInvocation) line: 110   
    ReflectiveMethodInvocation.proceed() line: 172  
    ExposeInvocationInterceptor.invoke(MethodInvocation) line: 89   
    ReflectiveMethodInvocation.proceed() line: 172  
    JdkDynamicAopProxy.invoke(Object, Method, Object[]) line: 202   
    $Proxy17.findUserByUsername(String) line: not available 
    UserService.getUser(String) line: 74

at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:382)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at $Proxy17.findUserByUsername(Unknown Source)
    at com.service.UserService.getUser(UserService.java:74)

<aop:config>
        <aop:aspect id=\"dbExceptionsAspect\" ref=\"DBExceptions\" order=\"1\">
            <aop:after-throwing throwing=\"ex\"
                pointcut=\"execution(* com.dao.impl.*.*(*))\" method=\"doDAOActions\" />
        </aop:aspect>
    </aop:config>

DAOExceptionTranslator.doDAOActions(Exception) line: 12 
    NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]  
    NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39  
    DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25  
    Method.invoke(Object, Object...) line: 597  
    AspectJAfterThrowingAdvice(AbstractAspectJAdvice).invokeAdviceMethodWithGivenArgs(Object[]) line: 621   
    AspectJAfterThrowingAdvice(AbstractAspectJAdvice).invokeAdviceMethod(JoinPointMatch, Object, Throwable) line: 603   
    AspectJAfterThrowingAdvice.invoke(MethodInvocation) line: 59    
    ReflectiveMethodInvocation.proceed() line: 172  
    ExposeInvocationInterceptor.invoke(MethodInvocation) line: 89   
    ReflectiveMethodInvocation.proceed() line: 172  
    JdkDynamicAopProxy.invoke(Object, Method, Object[]) line: 202   
    $Proxy17.findUserByUsername(String) line: not available 
    UserService.getUser(String) line: 74