Question

我的JSON字符串：

{ ＆＃34; categorySetName＆＃34;：＆＃34; TSN＆＃34;，＆＃34;行＆＃34;：[ { ＆＃34; date＆＃34;：201750，＆＃34; rank1＆＃34;：{ ＆＃34;标签＆＃34;：＆＃34; \ uBC30 \ uACBD＆＃34;，＆＃34; search_keyword＆＃34;：＆＃34; \ uBC30 \ uACBD＆＃34;，＆＃34;频率＆＃34;：3975，＆＃34;得分＆＃34;：69.27185 }，＆＃34; rank2＆＃34;：{ ＆＃34;标签＆＃34;：＆＃34; \ uBC30 \ uACBD \ uD654 \ uBA74＆＃34;，＆＃34; search_keyword＆＃34;：＆＃34; \ uBC30 \ uACBD \ uD654 \ uBA74＆＃34;，＆＃34;频率＆＃34;：3736，＆＃34;得分＆＃34;：109.83768 }，＆＃34; rank3＆＃34;：{ ＆＃34;标签＆＃34;：＆＃34; \ uC544 \ uC774 \ uD3F0x＆＃34;，＆＃34; search_keyword＆＃34;：＆＃34; \ uC544 \ uC774 \ uD3F0x＆＃34;，＆＃34;频率＆＃34;：3382，＆＃34;得分＆＃34;：62.057728 }，。。。。＆＃34; rank500＆＃34;：{ ＆＃34;标签＆＃34;：＆＃34; \ uC544 \ uC774 \ uD3F0x＆＃34;，＆＃34; search_keyword＆＃34;：＆＃34; \ uC544 \ uC774 \ uD3F0x＆＃34;，＆＃34;频率＆＃34;：1572，＆＃34;得分＆＃34;：68.057728 } } }

我的Deserializer.Java

@SuppressWarnings("serial")
public class AssociationTopRowDeserializer extends StdDeserializer<AssociationTopRow> {

    public static final String DATE = "date";
    public static final List<String> knownFieldNames = Arrays.asList(DATE);

    public AssociationTopRowDeserializer() {
        this(null);
    }

    public AssociationTopRowDeserializer(Class<AssociationTopRow> c) {
        super(c);
    }

    @Override
    @SuppressWarnings("unchecked")
    public AssociationTopRow deserialize(JsonParser jsonParser, DeserializationContext desContext) throws IOException {
        AssociationTopRow row = new AssociationTopRow();
        JsonNode jsonNode = jsonParser.getCodec().readTree(jsonParser);
        ObjectMapper objectMapper = new ObjectMapper();

        row.setDate(jsonNode.get(DATE).asText());

        String unknownField = getUnknownField(jsonNode.fieldNames());
        if (unknownField != null) {
            Map<String, AssociationTopRowDetail> map = new HashMap<String, AssociationTopRowDetail>();
            map.put(unknownField, (AssociationTopRowDetail) objectMapper.convertValue(jsonNode.get(unknownField),
                    AssociationTopRowDetail.class));
            row.setTransMap(map);
        }
        return row;
    }

    public String getUnknownField(Iterator<String> fieldNames) {
        while (fieldNames.hasNext()) {
            String next = fieldNames.next();
            if (!knownFieldNames.contains(next))
                return next;
        }
        return null;
    }
}

这只显示了有关＆＃39; rank1＆＃39;的信息。

Answer 1

您可以使用@JsonAnySetter注释而不是自定义反序列化器：

public class AssociationTopRow {

    private String date;
    private final Map<String, AssociationTopRowDetail> details = new LinkedHashMap<>();

    // getter & setter for date

    @JsonAnySetter
    public void addDetail(String key, AssociationTopRowDetail detail) {
        details.put(key, detail);
    }

    @JsonAnyGetter
    public Map<String, AssociationTopRowDetail> getDetails() {
        return details;
    }

}

我如何在Java中解析这个Json字符串

1 个答案: