我有一個模板對象類型 ExternalActionReqBean 有一個對象，可以通過指示操作字段設置任何類讓我們說，如果 action="FROZEN" ， ExternalActionReqBean->payload 將使用 ExternalActionFrozenReqBean 類類型，如果 action="UNFROZEN" ExternalActionUnFrozenReqBean 類類型將被使用。如果有效載荷如下所示，實現這一目標的最佳實踐是什么？{"txnID":"txn","action":"FROZEN","resource":"PNSENDER","payload":{"msisdn_list":["xxxx","xxx","xxx"]}}ExternalActionReqBean externalActionReqBean = GSON.fromJson(payload, ExternalActionReqBean.class); if("FROZEN".equals(externalActionReqBean.getAction())){ // externalActionFrozenReqBean = GSON.fromJson(externalActionReqBean.getPayload(),ExternalActionFrozenReqBean.class); }@Data@AllArgsConstructorpublic class ExternalActionReqBean { private String txnID; private String action; private String resource; private Object payload;}@Datapublic class ExternalActionFrozenReqBean { private List<String> msisdn_list;}@Datapublic class ExternalActionUnFrozenReqBean { private String result;}
1 回答
開滿天機
TA貢獻1786條經驗 獲得超13個贊
我已經更改了 ExternalActionReqBean 類簽名，它的類型被轉換為通用，而不是使用 TypeToken 如下。
@Data
@AllArgsConstructor
public class ExternalActionReqBean<T> {
private String txnID;
private String action;
private String resource;
private T payload;
}
代碼：
if ("FROZEN".equals(externalActionReqBean.getAction())) {
Type complexType = new TypeToken<ExternalActionReqBean<ExternalActionFrozenReqBean>>() {}.getType();
ExternalActionReqBean<ExternalActionFrozenReqBean> result = GSON.fromJson(payload, complexType);
}
感謝https://futurestud.io/tutorials/gson-advanced-generics，您可以在“泛型反序列化”下找到更多信息
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