如何在 jackson 的注释 JSON 属性中使用正则表达式 [英] How to use regular expression in the annotation JSON property from jackson

问题描述

jsonproperty注解可以使用正则表达式吗?是怎么做的?

Is possible use regular expression for the jsonproperty annotation and how is it done?

我有来自第三方的 json 前缀，其属性如下所示:

I have json from third party who prefix properties like below:

{ 
   "1. information": "testing"
   "2. information": "testing 2"
}

我希望所有信息都附加到列表数组信息中，请参见下面的伪示例:

I would like that all information get attach to list Array information, see below example of pseudo:

public class TimeSeries {
        @JsonProperty(/.*information/g)
        private List<String> information;
}

有时一些字符串属性也是带日期的后缀，这是可能的，但除此之外还有唯一的名称.可以在这里使用正则表达式吗?

Sometimes some of String properties is also postfix with date, is possible, but have unique name besides that. Is possible to use regular expression here?

{ 
   "Price 2019-09-01": "testing"
   "Quantity 2019-09-01": "testing 2"
}

推荐答案

我通过反序列化找到了答案，见下例:

I found the answer through deserialize, see below example:

@JsonIgnoreProperties(ignoreUnknown = true)
@Getter
@Setter
@NoArgsConstructor
public class TimeSeries {

    @JsonProperty("Meta Data")
    private MetaData metaData;

    @JsonDeserialize(using = MetaDataDeserializer.class)
    @Getter
    @Setter
    @NoArgsConstructor
    static class MetaData {
        private String information;
        private String symbol;
    }

    private static class MetaDataDeserializer extends StdDeserializer<MetaData> {
        protected MetaDataDeserializer() {
            super(MetaData.class);
        }

        @Override
        public MetaData deserialize(JsonParser parser, DeserializationContext ctxt) throws IOException {
            MetaData metaData = new MetaData();
            while (!parser.isClosed()) {
                JsonToken jsonToken = parser.nextToken();

                if (JsonToken.FIELD_NAME.equals(jsonToken)) {
                    String fieldName = parser.getCurrentName();
                    System.out.println(fieldName);

                    //jsonToken =
                    parser.nextToken();

                    if (fieldName.toLowerCase().matches(".*information")) {
                        metaData.setInformation(parser.getValueAsString());
                    }
                }
            }

            return metaData;
        }
    }
}

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