Java根据REST调用显示/隐藏对象字段

Question

是否可以根据REST调用配置Item类来显示和隐藏特定字段？例如，当调用XMLController时，我希望从User类中隐藏colorid（并显示categoryid)，而当调用JSONController时，我希望从User类中隐藏colorid。

@Getter
@Setter
@NoArgsConstructor
public class Item
{
   private Long id;
   private Long categoryId;    // <-- Show field in XML REST call and hide in JSON REST call
   private Long colorId;       // <-- Show field in JSON REST call and hide in XML REST call
   private Long groupId;
   @JacksonXmlProperty(localName = "item")
   @JacksonXmlElementWrapper(localName = "groupItems")
   private List<GroupedItem> item;
}

@RestController
@RequestMapping(
    path = "/json/",
    produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public class JsonController
{
    @Autowired
    private Service service;

    @RequestMapping(path = "{colorId}")
    public Item getArticles(@PathVariable("colorId") Long colorId)
    {
        return service.getByColor(colorId); // returns JSON without "categoryId"
    }
}

@RestController
@RequestMapping(
    path = "/xml/",
    produces = MediaType.APPLICATION_XML_VALUE)
public class XmlController
{
    @Autowired
    private Service service;

    @RequestMapping(path = "{categoryId}")
    public Item getArticles(@PathVariable("categoryId") Long categoryId)
    {
        return service.getByCategory(categoryId); // returns XML without "colorId"
    }
}

Answer 1

是的，使用jackson JSON视图和objectmapper#writerwithview方法可以实现这一点。

您只需要为两个控制器不同地配置objectmapper，就可以进行了

下面是jackson JSON视图的一个示例，我们注意到ownername只能在内部访问，而不能公开访问

public class Item {
 
    @JsonView(Views.Public.class)
    public int id;

    @JsonView(Views.Public.class)
    public String itemName;

    @JsonView(Views.Internal.class)
    public String ownerName;
}