How Do I use a bunch of DAO's using in-memory derby database using spring autowiring.?

I have a collection of DALS such as Transaction DAO, Billing DAO etc. Each of them have CRUD operations and I need to use that methods in my project using spring autowiring. In some of the projects that I have checked out, I saw that they are fetching the data inmemory by querying. However, I have to use the DAL's that have already been written and have all the CRUD operations.

For example:

        @Autowired
        TransactionDAO transactionDAO

        @Autowired
        BillingDAO billingDAO

   @Test
   public void testImplementSearchMethodForDAO() throws Exception{

   TransactionVO transactionVO = getTransVO();
   BillingVO billingVO = getBillingVO();
   List<TransactionVO> VOList1 = transactionDAO.searchList(transactionVO);
   List<BillingVO> VOList2 = billingDAO.searchList(billingVO);
   assertThat(VOList1.size()).isEqualto(1));
   assertThat(VOList1.size()).isEqualto(1));
   }
  (Assuming I added one VO value in each table).

 If you need any more clarifications, I will be glad to provide you.