Controller->Service->Repository

1.controller 层接受用户的HTTP请求2.Service 层由Controller层调用而来的，具体是处理业务逻辑3.Repository层也是DAO层，Service层调用Repository层的CRUD操作。

4.代码示例：1)Controller层：@RestControllerpublic class TransactionDataController{    @Autowired    TransactionDataService transactionDataService;    @RequestMapping(value = "/transactiondata", consumes = MediaType.APPLICATION_JSON_UTF8_VALUE, method =    { RequestMethod.POST })    public ResponseEntity<String> saveTransactionData(@Valid @RequestBody InboundTransaction inboundTransaction)    {        transactionDataService.saveTransactionData(inboundTransaction);        return new ResponseEntity<>("Created", HttpStatus.CREATED);    }}2)Service 层@Servicepublic class TransactionDataServiceImpl extends PersistenceBasicRepository implements TransactionDataService{    @Autowired    InboundTransacitonRepository inboundTransacitonRepository ;          /**      * create an instance: TransactionDataServiceImpl.       * Title: TransactionDataServiceImpl      * Description: constructor      * @param clazz      */        public TransactionDataServiceImpl()    {        super(InboundTransaction.class);      }    /**      * Title: saveTransactionData      * Description: save transaction data      * @param inboundTransaction (describe the param)      * @see com.sap.csc.ems.integration.service.TransactionDataService#saveTransactionData(com.sap.csc.ems.model.integration.InboundTransaction)      */         @Override    public void saveTransactionData(InboundTransaction inboundTransaction)    {        inboundTransacitonRepository.save(inboundTransaction);    }}3)Repository层@Repositorypublic class InboundTransacitonRepositoryImpl extends PersistenceBasicRepository implements InboundTransacitonRepository{    /**     * create an instance: InboundTransacitonRepositoryImpl. Title: InboundTransacitonRepositoryImpl Description:     * constructor     *      * @param clazz     */    public InboundTransacitonRepositoryImpl()    {        super(InboundTransaction.class);    }    /**     * Title: save Description: save inbound transaction data     *      * @param inboundTransaction     *            (describe the param)     * @see com.sap.csc.ems.persistence.repository.integration.InboundTransacitonRepository#save(com.sap.csc.ems.model.integration.InboundTransaction)     */    @Override    public void save(InboundTransaction inboundTransaction)    {        Long id = getNextSeq();        inboundTransaction.setTransactionId(id);        insert(inboundTransaction);    }}