我需要从外部API获得带有货币价值的表格，正是从该页面：http://api.nbp.pl/api/exchangerates/tables/A?format=json我想在货币类中获得答案。有人能帮我完成这项任务吗？

@Service
public class CurrentFromNBPImpl implements CurrentFromNBP {

@Override
public Currency getValueOfCurrency(String currencyCode) throws WrongCurrencyCode {

    Currency currency = null;

    try {
        URL url = new URL("http://api.nbp.pl/api/exchangerates/tables/A?format=json");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Content-Type", "application/json");

        if (connection.getResponseCode() == 404)
            throw new WrongCurrencyCode(currencyCode);

        InputStreamReader inputStreamReader = new InputStreamReader(connection.getInputStream());
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
        String jsonOutput = bufferedReader.readLine();

        connection.disconnect();

        ObjectMapper objectMapper = new ObjectMapper();
        Currency list = objectMapper.readValue(jsonOutput, Currency.class);
        System.out.println(list);
    } catch (IOException e) {
        e.printStackTrace();
    }

    assert false;
    return currency;
}
}



@Data
public class Currency {

    @JsonProperty("table")
    private String table;
    @JsonProperty("no")
    private String no;
    @JsonProperty("effectiveDate")
    private String effectiveDate;
    @JsonProperty("rates")
    private List<Rate> rates = null;

}
@Data
public class Rate {

    @JsonProperty("currency")
    private String currency;
    @JsonProperty("code")
    private String code;
    @JsonProperty("mid")
    private Double mid;

    }

log： com.fasterxml.jackson.datind.exc.MismatchedInputException：无法反序列化com.kolej.bartos z.挑战.domain.Currency的START_ARRAY令牌的实例，位于[Source：（String）"[{"table"："A"，"no"："062/A/NBP/2019"，"effectiveDate"："2019-03-28"，"rate"：[{"currency"："bat（Tajlandia）"，"code"："THB"，"mid"：0.1202}，{"currency"："dolar ameryka'ski"，"code"："USD"，"mid"：3.8202}，{"currency"："dolar Australia alijski"，"code"："AUD"，"mid"：2.7098}，{"currency"："dolar Hong kongu"，"code"："HKD"，"mid"：0.4867}，{"currency"SGD"，"mid2.8179}，{"currency"："eu"[截断的1616个字符]；第1行，第1列]