java - Jersey Jackson 响应实体的 JSON 反序列化导致空白字段

Question

我遇到了一个问题。当 Jersey 客户端通过调用反序列化我的 POJO 时

jersey.api.ClientResponse#getEntity(OrderCostSummary.class)

响应 json 中的所有字段(即 subTotal、shippingCost、tax 和 Total)均为空。

我最初认为这可能是与 Money 类有关的问题，即 ObjectMapper 不知道如何反序列化此类，但我有其他 api 调用，它们返回带有 Money 字段的响应实体，反序列化没有任何问题。

这是从服务器返回的 JSON:

{ "orderCostSummary":{
  "subTotal":{
     "amount":"9.99",
     "currency":"GBP"
  },
  "shippingCost":{
   "money": {
     "amount":2.95,
     "currency":"GBP"
     }
  },
  "tax":{
     "amount":0,
     "currency":"GBP"
  },
  "total":{
     "amount":12.94,
     "currency":"GBP"
  }}}

POJO

public class OrderCostSummary {
private Money subTotal;
private Money shippingCost;
private Money tax;
private Money total;

/**
 * Instantiates a new Order cost summary.
 */
public OrderCostSummary() {
}

public Money getSubTotal() {
    return subTotal;
}

public void setSubTotal(Money subTotal) {
    this.subTotal = subTotal;
}

public Money getShippingCost() {
    return shippingCost;
}

public void setShippingCost(Money shippingCost) {
    this.shippingCost = shippingCost;
}

public Money getTax() {
    return tax;
}

public void setTax(Money tax) {
    this.tax = tax;
}

public Money getTotal() {
    return total;
}

public void setTotal(Money total) {
    this.total = total;
}

public class Money {
private BigDecimal amount;
private Currency currency;

我的钱POJO

public Money() { }

public Money(BigDecimal amount, Currency currency) {
    this.amount = amount;
    this.currency = currency;
}

public BigDecimal getAmount() {
    return amount;
}

public void setAmount(BigDecimal amount) {
    this.amount = amount;
}

public Currency getCurrency() {
    return currency;
}

public void setCurrency(Currency currency) {
    this.currency = currency;
}

Answer 1

也许如果你尝试一下:

public class OrderCostSummary implements Serializable {
    @JsonDeserialize(as=Money.class)
    private Money subTotal;
    //And do the same with other fields.
    ...
}

请注意，我添加了“实现可序列化”，这对于序列化/反序列化的 POJO 来说更好