Question

我有String witj Json：

String str = "[{
    "serviceid": "312",
    "servicetype": "0",
    "nextrecurringchargedate": "null"
},
{
    "serviceid": "104",
    "servicetype": "0",
    "nextrecurringchargedate": "null"
},
{
    "serviceid": "310",
    "servicetype": "0",
    "nextrecurringchargedate": "null"
}]";

我有模特：

public class NextChDay {
    @SerializedName("serviceid")
    private Long serviceId;
    @SerializedName("servicetype")
    private Long serviceType;
    @SerializedName("nextrecurringchargedate")
    private Date nextrecurringchargedate;

    public NextChDay() {
    }

    public NextChDay(Long serviceId, Long serviceType, Date nextrecurringchargedate) {
        this.serviceId = serviceId;
        this.serviceType = serviceType;
        this.nextrecurringchargedate = nextrecurringchargedate;
    }

// getters and setters

我希望将Json转换为模型使用GSON库

NextChDay[] nextChDays = GSON.fromJson(str, NextChDay[].class);

但我有一个错误：

java.text.ParseException: Unparseable date: "null"

以前，我对“null”没有任何问题，我不明白如何解决这个问题。请帮帮我。

Answer 1

值null是JSON中的保留字/值，因此不应该用引号或双引号括起来。当它被包装时，它实际上被认为是包含字符n，u，l和l的字符串值。

所以，试着替换这一行：

"nextrecurringchargedate": "null"

这一行：

"nextrecurringchargedate": null

当我尝试将隐藏的json与null模型使用GSON时出错

1 个答案: