Question

我试图将我的代码Json数组中的Json元素反序列化为自定义类..但我不能：

ObjectMapper OMapper = new ObjectMapper();
OMapper.configure(Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true);
OMapper.configure(Feature.ALLOW_SINGLE_QUOTES, true);
OMapper.configure(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS, true);
OMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
OMapper.enable(SerializationFeature.INDENT_OUTPUT);

JsonNode node = OMapper.readTree("{\"headers\":[\"st1\", \"ddf2\", \"sdsd\"]}");


headers h = OMapper.treeToValue(node.get("headers"), headers.class);

这是班级：

public class headers{   
    public headers(){
        System.out.println("dssdsd");

    }

    @JsonSetter
    public void set(){
        System.out.println("ASAASAAS");
    }

    @JsonGetter()
    public JsonNode get(int index){
        System.out.println("XXXXXXXXXx");
        return null;
    }
}

但是我收到了这个错误：

com.fasterxml.jackson.databind.exc.MismatchedInputException：不能 [源代码：在源代码中反序列化START_ARRAY标记中的标题实例：未知; line：-1，column：-1] at com.fasterxml.jackson.databind.exc.MismatchedInputException.from（MismatchedInputException.java:62）在 com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch（DeserializationContext.java:1307）在 com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken（DeserializationContext.java:1116）在 com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken（DeserializationContext.java:1070）在 com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromArray（BeanDeserializerBase.java:1447）在 com.fasterxml.jackson.databind.deser.BeanDeserializer._deserializeOther（BeanDeserializer.java:173）在 com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize（BeanDeserializer.java:149）

Answer 1

您应该将headers指定为数组。

headers[] h = OMapper.treeToValue(node.get("headers"), headers[].class);

无法使用Jackson

1 个答案: