JPA - Spring boot - @ OneToMany persistence works fine, but I get a weird object when returning a Json object

Question

I have two objects ( Category | product )with a bi-directional ratio @OneToMany.

@Entity
public class Category {

    public Category() {
        // TODO Auto-generated constructor stub
    }

    public Category(String name,String description) {
        this.name=name;
        this.description=description;
    }

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private long cid;

    private String name;

    private String description;

    @OneToMany(mappedBy="category",cascade=CascadeType.ALL, orphanRemoval=true)
    private Set<Product> products;
    /..getters and setter.../

    }

    @Entity
    public class Product {
    public Product() {
        // TODO Auto-generated constructor stub
    }

    public Product(long price, String description, String name) {
        // TODO Auto-generated constructor stub
        this.name=name;
        this.description=description;
        this.price=price;

    }

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private long pid;

    private long price;

    private String name;

    private String description;

    @ManyToOne  
    private Category category;
    /..getters and setters../
    }

in my controller I have a function / categorization that adds a new category with one product, it works fine, and in my database I have a foreign category identifier

But when I try to get all categories using responseBody, I got a strange object in a category (I want to have in the product, categories: category identifier, not the object itself)

public @ResponseBody Category create() {
    Category c=new Category("LIGA","messi feghouli cristiano");

    Product p=new Product(200,"jahd besaf","Real Madrid");

    if(c.getProducts()!=null){
        c.addProducts(p);
    }else{
        Set<Product> products=new HashSet<Product>();           
        products.add(p);
        c.setProducts(products);
    }
    p.setCategory(c);

    cDao.save(c);  pDao.save(p);        
    return c;
}


@RequestMapping(value="/categories",method = RequestMethod.GET)
public @ResponseBody List<Category> categories() {
    return cDao.findAll();
}

this is the strat object i got:

{"cid":1,"name":"LIGA","description":"messi feghouli cristiano","products":[{"price":200,"name":"Real Madrid","description":"jahd besaf","category":{"cid":1,"name":"LIGA","description":"messi feghouli cristiano","products":[{"price":200,"name":"Real Madrid","description":"jahd besaf","category":{"cid":1,"name":"LIGA","description":"messi feghouli cristiano","products":[{"price":200,"name":"Real Madrid","description":"jahd besaf","category":{"cid":1,"name":"LIGA","description":"messi feghouli cristiano","products":

Answer 1

, .

, @JsonBackReference. , (, ) .

, getProductID getCategoryID @JsonIgnore.