2017-04-22 42 views
0

我想有一個REST端點創建WidgetPOST荷蘭國際集團給它一個亞型,使用@JsonTypeInfo&@JsonSubTypes不能正常工作將JSON反序列化爲多態對象模型?

這裏是所有Widget小號

@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "widgetType") 
@JsonSubTypes({ 
     @JsonSubTypes.Type(value = TextWidget.class, name = WidgetType.Constants.TEXT), 
     @JsonSubTypes.Type(value = ImageWidget.class, name = WidgetType.Constants.IMAGE), 
     @JsonSubTypes.Type(value = IndicatorWidget.class, name = WidgetType.Constants.INDICATOR), 
     @JsonSubTypes.Type(value = MapWidget.class, name = WidgetType.Constants.MAP), 
     @JsonSubTypes.Type(value = ChartWidget.class, name = WidgetType.Constants.CHART) 
}) 
@Data 
@Slf4j 
public abstract class Widget { 
... 
} 

的基類,這是在WidgetType枚舉:

public enum WidgetType { 
    TEXT(Constants.TEXT), 
    IMAGE(Constants.IMAGE), 
    INDICATOR(Constants.INDICATOR), 
    MAP(Constants.MAP), 
    CHART(Constants.CHART); 
    private final String type; 
    WidgetType(final String type) { 
     this.type = type; 
    } 

    public static class Constants { 
     public static final String TEXT = "TEXT"; 
     public static final String IMAGE = "IMAGE"; 
     public static final String INDICATOR = "INDICATOR"; 
     public static final String MAP = "MAP"; 
     public static final String CHART = "CHART"; 
    } 
} 

這是我的春天端點:

@RequestMapping(method = RequestMethod.POST) 
public Optional<Widget> createWidget(@Valid final Widget widget) { 
    ... 
    } 

打端點時,它拋出這個異常:

{ 
    "timestamp": 1493029336774, 
    "status": 500, 
    "error": "Internal Server Error", 
    "exception": "org.springframework.beans.BeanInstantiationException", 
    "message": "Failed to instantiate [....models.Widget]: Is it an abstract class?; nested exception is java.lang.InstantiationException", 
    "path": "...." 
} 

通過我的問題幾種解決方案略讀,我可能要手動註冊亞型,我可能是錯的,但我認爲必須有一個辦法使它與註釋一起工作,也許我錯過了一些東西?

回答

2

問題解決了, 我用傑克遜註釋註釋了我的類,忘記了我發送了多段POST請求,甚至沒有去Jackson。 解決方案如此簡單:

@RequestMapping(method = RequestMethod.POST) 
public Optional<Widget> createWidget(@RequestBody final Widget widget) { 
    ... 
    } 
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