Question

我正在尝试为购买构建简单的REST，我需要2种方法。第一种方法应显示按日期排序的所有购买。第二个删除指定日期的所有购买，我做了一个添加和获取所有购买的方法。现在我被卡住了。

@Entity
@Table (name="purchase")
public class Purchase {

@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@Column(name = "name")
private String name;

@CreationTimestamp
@Temporal(TemporalType.DATE)
@Column(name="createat")
private Date created;

@Column(name="price")
private BigDecimal price;


@Column(name="currency")
private String currency;
@Repository
public interface PurchaseRepository extends JpaRepository<Purchase, Long> 
{
}

@Service
public class PurchaseService {

@Autowired
private PurchaseRepository purchaseRepository;

public void addPurchase(Purchase purchase) {
    purchaseRepository.save(purchase);
}

public List<Purchase> getAllPurchase() {

    List<Purchase> purchase = new ArrayList<>();
    purchaseRepository.findAll().forEach(purchase::add);
    return purchase;
}
}

@RestController
public class PurchaseController {

@Autowired
private PurchaseService purchaseService;

@PostMapping("/purchase")
public void addPurchase(@RequestBody Purchase purchase) {
    purchaseService.addPurchase(purchase);
}

@RequestMapping("/purchase")
public List<Purchase> getAllTopics() {
    return purchaseService.getAllPurchase();
}
}

我需要什么： 1.按日期排序我的列表的方法 2.删除指定日期所有购买的方法

Answer 1

在这些情况下，您可以使用Spring Data JPA功能。

将以下方法添加到PurchaseRepository：

List<Purchase> findAllByOrderByCreatedAsc();
long deleteByCreated(Date created);

毕竟，Spring将基于方法名称生成适当的查询。

Answer 2

我明白了

long deleteByCreated(Date date);
@Transactional
public long deleteAllByDate(Date date){
    return purchaseRepository.deleteByCreated(date);
}
@RequestMapping(method=RequestMethod.DELETE, value="/purchasess/{date}")
    public long findAllByCreatedBetween(@DateTimeFormat(pattern="yyyy-MM-dd") 
@PathVariable  Date date){
        return purchaseService.deleteAllByDate(date);
    }

如何排序List <object> CRUD存储库

2 个答案: