kotlinx.serialization.json.internal.JsonDecodingException:应为数组“[”的开头，但却有“EOF”

mw3dktmi 于 2022-11-30 发布在 Kotlin

关注(0)|答案(2)|浏览(361)

我使用retrofit 2 + kotlinx序列化来反序列化响应。json响应看起来像这样。

{
    "type": "ETA",
    "version": "1.0",
    "generated_timestamp": "2022-11-29T15:39:57+08:00",
    "data": [
        {
            "co": "KMB",
            "route": "91M",
            "dir": "I",
            "service_type": 1,
            "seq": 13,
            "dest_tc": "寶林",
            "dest_sc": "宝林",
            "dest_en": "PO LAM",
            "eta_seq": 1,
            "eta": "2022-11-29T15:52:21+08:00",
            "rmk_tc": "",
            "rmk_sc": "",
            "rmk_en": "",
            "data_timestamp": "2022-11-29T15:39:44+08:00"
        },
        {
            "co": "KMB",
            "route": "91M",
            "dir": "I",
            "service_type": 1,
            "seq": 13,
            "dest_tc": "寶林",
            "dest_sc": "宝林",
            "dest_en": "PO LAM",
            "eta_seq": 2,
            "eta": "2022-11-29T16:06:39+08:00",
            "rmk_tc": "原定班次",
            "rmk_sc": "原定班次",
            "rmk_en": "Scheduled Bus",
            "data_timestamp": "2022-11-29T15:39:44+08:00"
        },
        {
            "co": "KMB",
            "route": "91M",
            "dir": "I",
            "service_type": 1,
            "seq": 13,
            "dest_tc": "寶林",
            "dest_sc": "宝林",
            "dest_en": "PO LAM",
            "eta_seq": 3,
            "eta": "2022-11-29T16:21:39+08:00",
            "rmk_tc": "原定班次",
            "rmk_sc": "原定班次",
            "rmk_en": "Scheduled Bus",
            "data_timestamp": "2022-11-29T15:39:44+08:00"
        }
    ]
}

我尝试用这个模型进行解析。

@Serializable
data class MarsPhoto(
    val type: String = "", //The corresponding API that returns the data
    val version: String = "",//The version number of the JSON returned.
    val generated_timestamp: String = "",//The timestamp of the initial generated time of the response before it is cached.
    val data: Eta
)

@Serializable
data class Eta(
    val co:String ="KMB",//The bus company
    val route: String = "", //The bus route number of the requested bus company
    val dir: String = "",//The direction of the bus route
    val service_type: String = "",//The service type of the bus route.
    val seq: Int = 0, //The stop sequence number of a bus route
    val dest_tc: String = "",//The destination of a bus route in Traditional Chinese
    val dest_sc: String = "",//The destination of a bus route in Simplified Chinese.
    val dest_en: String = "",//The destination of a bus route in English
    val eta_seq: Int = 0,//The sequence number of ETA
    val eta: String = "-",//The timestamp of the next ETA
    val rmk_tc: String = "",//The remark of an ETA in Traditional Chinese
    val rmk_sc: String = "",//The remark of an ETA in Simplified Chinese.
    val rmk_en: String = "",//The remark of an ETA in English
    val data_timestamp: String = "",//The timestamp of the data when it was initially
)

但出现异常！

FATAL EXCEPTION: main                                                                                                 Process: com.example.marsphotos, PID: 17692                                                                                                   kotlinx.serialization.json.internal.JsonDecodingException: Expected start of the array '[', but had 'EOF' instead at path: $
                                                                                                    JSON input: .....heduled Bus","data_timestamp":"2022-11-29T16:30:16+08:00"}]}

我可以得到一些帮助吗

kotlin

来源：https://stackoverflow.com/questions/74611289/kotlinx-serialization-json-internal-jsondecodingexception-expected-start-of-the

2条答案

按热度按时间

9udxz4iz1#

从我在json响应中看到的内容来看，您收到了一个Eta对象数组。
因此，您可以尝试重写您的类以：

@Serializable
data class MarsPhoto(
    val type: String = "", //The corresponding API that returns the data
    val version: String = "",//The version number of the JSON returned.
    val generated_timestamp: String = "",//The timestamp of the initial generated time of the response before it is cached.
    val data: Data
)
@Serializable
data class Eta(
    val co:String ="KMB",//The bus company
    val route: String = "", //The bus route number of the requested bus company
    val dir: String = "",//The direction of the bus route
    val service_type: String = "",//The service type of the bus route.
    val seq: Int = 0, //The stop sequence number of a bus route
    val dest_tc: String = "",//The destination of a bus route in Traditional Chinese
    val dest_sc: String = "",//The destination of a bus route in Simplified Chinese.
    val dest_en: String = "",//The destination of a bus route in English
    val eta_seq: Int = 0,//The sequence number of ETA
    val eta: String = "-",//The timestamp of the next ETA
    val rmk_tc: String = "",//The remark of an ETA in Traditional Chinese
    val rmk_sc: String = "",//The remark of an ETA in Simplified Chinese.
    val rmk_en: String = "",//The remark of an ETA in English
    val data_timestamp: String = "",//The timestamp of the data when it was initially
)

@Serializable
data class Data( val data: List<Eta>)

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6uxekuva2#

试试这个

@Serializable
data class MarsPhoto(
    val type: String = "", 
    val version: String = "",
    val generated_timestamp: String = "",
    val data: List<Eta> = emptyList()
    )

赞(0）回复(0）举报 2022-11-30

我来回答

kotlinx.serialization.json.internal.JsonDecodingException:应为数组“[”的开头，但却有“EOF”

2条答案

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