java - 卡在从 JSONObject 获取 JSONArray 上

Question

我有一个类似于以下内容的 JSON 响应:

还有一个 Subscription POJO 类，其中包含“subscriptionPlans”的 Arraylist:

SubscriptionDetails.java

@Expose()
@SerializedName("subscriptionPlans")
public ArrayList<SubscriptionPlans> subscriptionPlans;


public ArrayList<SubscriptionPlans> getSubscriptionPlans() {
    return subscriptionPlans;
}

@Override
public String toString() {
    return "SubscriptionDetails{" +
            "subscriptionPlans=" + subscriptionPlans +
            '}';
}

订阅计划.java

@SerializedName("plan_name")
@Expose
public String planName;

@SerializedName("description")
@Expose
public String description;

@SerializedName("amount")
@Expose
public String amount;

public String getPlanName() {
    return planName;
}

public String getDescription() {
    return description;
}

public String getAmount() {
    return amount;
}

我使用 Gson 从 JSON 获取数据并将其填充到各种 POJO 类中，如下所示:

Gson gson = new Gson();
SubscriptionDetails subscriptionDetails = gson.fromJson(String.valueOf(jsonObject.getJSONArray("subscriptionPlans")), SubscriptionDetails.class);
ArrayList<SubscriptionPlans> subscriptionPlans = subscriptionDetails.getSubscriptionPlans();

String amount = subscriptionPlans.get(0).getAmount();

但是，我收到错误响应，java.lang.IllegalStateException:预期为 BEGIN_OBJECT，但在第 2 行列路径 $ 处为 BEGIN_ARRAY

我在这里错过了什么或做得不正确？

Answer 1

将整个字符串传递给 GSON，而不仅仅是 String.valueOf(jsonObject.getJSONArray("subscriptionPlans")):

SubscriptionDetails subscriptionDetails = gson.fromJson(String.valueOf(jsonObject), SubscriptionDetails.class);