傑克遜序列化列表實體（加場到根目錄）

這是我的實體傑克遜序列化列表實體（加場到根目錄）

@Entity 
public class Product extends AbstractBaseEntity { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Type(type = "objectid") 
    private String id; 
    private String title;

我的資源

@Path(value = ApiConstant.Urls.PRODUCTS) 
public class ProductResource { 

    @Inject 
    private ProductService productService; 

    @GET 
    @Path(value = ApiConstant.Urls.PRODUCTS) 
    @Produces(value = MediaType.APPLICATION_JSON) 
    public List getProducts(){ 
     return productService.findAll(); 
    }

我JSON響應

[ { 
    "id" : "596b6a02f70a0878590bcf08", 
    "title" : "test1", 
    "description" : "description test 1" 
}, { 
    "id" : "596b6b00f70a087b72d377eb", 
    "title" : "test1", 
    "description" : "description test 1" 
}, { 
    "id" : "596b6b75f70a087d40f580d5", 
    "title" : "test1", 
    "description" : "description test 1" 
} ]

我想創建一個計數字段對這樣的列表中的項目進行計數並將該列表添加到結果字段

{ 
    "count": 3, 
    "results": [ 
    { 
     "id" : "596b6a02f70a0878590bcf08", 
     "title" : "test1", 
     "description" : "description test 1" 
    }, { 
     "id" : "596b6b00f70a087b72d377eb", 
     "title" : "test1", 
     "description" : "description test 1" 
    }, { 
     "id" : "596b6b75f70a087d40f580d5", 
     "title" : "test1", 
     "description" : "description test 1" 
    } ], 
}

我想序列由JPA持續返回商品目錄

來源

2017-07-16 Pako

您可以創建一個新的類'ProductsWrapper'與'count'和'results'然後在'getProducts'方法創建的這個實例，而是返回它的名單。 – tima

您可以使用下面的類包括計數與Product實體的名單一起：

public class ResultList { 
    private int count; 
    @JsonProperty("results") private List<Product> products; 

    public List<Product> getProducts() { 
     return products; 
    } 

    public void setProducts(List<Product> products) { 
     this.products = Objects.requireNonNull(products, "products"); 
     this.count = products.size(); 
    } 

    public int getCount() { 
     return count; 
    } 
}

來源

2017-07-16 15:55:51 ck1

太好了......感謝您的幫助 – Pako

類泛型type

public class ResultList<T> { 

    private int count; 
    @JsonProperty("results") 
    private List<T> items; 

    public List<T> getItems() { 
     return items; 
    } 

    public void setItems(List<T> items) { 
     this.items = Objects.requireNonNull(items, "items"); 
     this.count = items.size(); 
    } 

    public int getCount() { 
     return count; 
    } 
}

ProductResource

@GET 
@Path(value = ApiConstant.Urls.PRODUCTS) 
@Produces(value = MediaType.APPLICATION_JSON) 
public ResultList getProducts(){ 
    List products = productService.findAll(); 
    ResultList result = new ResultList<Product>(); 
    result.setItems(products); 
    return result; 

}

感謝@ CK1

來源

2017-07-16 20:42:36 Pako

傑克遜序列化列表實體（加場到根目錄）

回答

相關問題