我正在使用SpringBoot和JPA构建REST接口。

现在，对于从数据库中获取的产品列表，我返回了一个奇怪的JSON。假设我有：

@Entity
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @ManyToOne(optional = false, fetch = FetchType.LAZY)
    @JoinColumn(name = "categoryId", nullable = false, updatable = false)
    private Category category;

    ...
}

@Entity
public class Category implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @OneToMany(mappedBy = "category", cascade = CascadeType.DETACH)
    @OrderBy("name ASC")
    private List<Product> products = Collections.emptyList();

    ...
}

的JPA存储库Product定义为：

public interface ProductRepository extends JpaRepository<Product, Long> {
    List<Product> findAll();
}

在我的控制器中，我有：

@Autowired
private ProductRepository productRepo;

@RequestMapping("/all-products", method = RequestMethod.GET)
public Map<String,Object> home() {
    Map<String,Object> model = new HashMap<String,Object>();
    model.put("products", productRepo.findAll());
    return model;
}

使我发疯的是，如果我尝试按以下方式致电此服务：

$ curl localhost:8080/all-products

由于表product和之间的关系，我得到了递归输出category，例如：

{"products":[{"id":1,"name":"Product1","category":
{"id":1,"name":"Cat1","products":[{"id":6,"name":"Product6","category":
{"id":1,"name":"Cat1","products":[{"id":6,"name":"Product6","category":
{"id":1,...

我究竟做错了什么？