Kotlin反序列化任何不支持的类型

时间：2018-10-24 01:05:31

标签： kotlin kotlinx.serialisation

我正在尝试使用kotlin.serialization将JSON反序列化为kotlin类。但是，当代码去反序列化json时，它将引发错误kotlinx.serialization.SerializationException: Any type is not supported

有人可以帮助我解决这个问题吗？

产品：

@Serializable
data class Product(
        val id: Int = 0,
        val name: String = "",
        val slug: String = "",
        val permalink: String = "",
        @SerialName("date_created") val dateCreated: String = "",
        @SerialName("date_created_gmt") val dateCreatedGmt: String = "",
        @SerialName("date_modified") val dateModified: String = "",
        @SerialName("date_modified_gmt") val dateModifiedGmt: String = "",
        val type: String = "",
        val status: String = "",
        val featured: Boolean = false,
        @SerialName("catalog_visibility") val catalogVisibility: String = "",
        val description: String = "",
        @SerialName("short_description") val shortDescription: String = "",
        val sku: String = "",
        val price: String = "",
        @SerialName("regular_price") val regularPrice: String = "",
        @SerialName("sale_price") val salePrice: String = "",
        @SerialName("on_sale") val onSale: Boolean = false,
        val purchasable: Boolean = false,
        @SerialName("total_sales") val totalSales: Int = 0,
        @SerialName("external_url") val externalUrl: String = "",
        @SerialName("tax_status") val taxStatus: String = "",
        @SerialName("tax_class") val taxClass: String = "",
        @SerialName("stock_quantity") val stockQuantity: String = "",
        @SerialName("stock_status") val stockStatus: String = "",
        val backorders: String = "",
        @SerialName("backorders_allowed") val backordersAllowed: Boolean = false,
        val backordered: Boolean = false,
        @SerialName("sold_individually") val soldIndividually: Boolean = false,
        val weight: String = "",
        val dimensions: ProductDimensions = ProductDimensions(),
        @SerialName("shipping_required") val shippingRequired: Boolean = false,
        @SerialName("shipping_taxable") val shippingTaxable: Boolean = false,
        @SerialName("shipping_class") val shippingClass: String = "",
        @SerialName("shipping_class_id") val shippingClassId: Int = 0,
        @SerialName("reviews_allowed") val reviewsAllowed: Boolean = false,
        @SerialName("average_rating") val averageRating: String = "",
        @SerialName("rating_count") val ratingCount: Int = 0,
        @SerialName("related_ids") val relatedIds: List<Int> = listOf(),
        @SerialName("upsell_ids") val upsellIds: List<Int> = listOf(),
        @SerialName("cross_sell_ids") val crossSellIds: List<Int> = listOf(),
        @SerialName("parent_id") val parentId: Int = 0,
        @SerialName("purchase_note") val purchaseNote: String = "",
        val categories: List<ProductCategory> = listOf(),
        val images: List<ProductImage> = listOf(),
        val attributes: List<ProductAttribute> = listOf(),
        val variations: List<Int> = listOf()
)

ProductDimension：

data class ProductDimensions(
        val length: String = "",
        val width: String = "",
        val height: String = ""
)

产品属性：

data class ProductAttribute(
        val id: Int = 0,
        val name: String = "",
        val position: Int = 0,
        val visible: Boolean = false,
        val variation: Boolean = false,
        val options: List<String> = listOf()
)

产品类别：

data class ProductCategory(
        val id: Int = 0,
        val name: String = "",
        val slug: String = ""
)

产品图片：

data class ProductImage(
        val id: Int = 0,
        @SerialName("date_created") val dateCreated: String = "",
        @SerialName("date_created_gmt") val dateCreatedGmt: String = "",
        @SerialName("date_modified") val dateModified: String = "",
        @SerialName("date_modified_gmt") val dateModifiedGmt: String = "",
        val src: String = "",
        val name: String = "",
        val alt: String = ""
)

关联的json位于pastebin here

上

2 个答案:

答案 0 :(得分：2)

这里是使用最后版本的Kotlin（1.3.0）和序列化运行时（0.9.0）的cloud9（仅运行./gradlew run）一种有效的解决方案

val serializer = Product.serializer().list
val json = JSON.nonstrict.parse<List<Product>>(serializer, jsonString)

请注意，某些属性必须添加@Optional批注才能进行此序列化才能与您的示例一起使用，因此是非严格版本的解析。

@Serializable
data class Product(
        val id: Int = 0,
        val name: String = "",
        val slug: String = "",
        val permalink: String = "",
        @Optional @SerialName("date_created") val dateCreated: String = "",
        @SerialName("date_created_gmt") val dateCreatedGmt: String = "",
        @SerialName("date_modified") val dateModified: String = "",
        @SerialName("date_modified_gmt") val dateModifiedGmt: String = "",
        val type: String = "",
        val status: String = "",
        val featured: Boolean = false,
        @SerialName("catalog_visibility") val catalogVisibility: String = "",
        val description: String = "",
        @SerialName("short_description") val shortDescription: String = "",
        val sku: String = "",
        val price: String = "",
        @SerialName("regular_price") val regularPrice: String = "",
        @SerialName("sale_price") val salePrice: String = "",
        @SerialName("on_sale") val onSale: Boolean = false,
        val purchasable: Boolean = false,
        @SerialName("total_sales") val totalSales: Int = 0,
        @SerialName("external_url") val externalUrl: String = "",
        @SerialName("tax_status") val taxStatus: String = "",
        @SerialName("tax_class") val taxClass: String = "",
        @SerialName("stock_quantity") val stockQuantity: String = "",
        @Optional @SerialName("stock_status") val stockStatus: String = "",
        val backorders: String = "",
        @SerialName("backorders_allowed") val backordersAllowed: Boolean = false,
        val backordered: Boolean = false,
        @SerialName("sold_individually") val soldIndividually: Boolean = false,
        val weight: String = "",
        val dimensions: ProductDimensions = ProductDimensions(),
        @SerialName("shipping_required") val shippingRequired: Boolean = false,
        @SerialName("shipping_taxable") val shippingTaxable: Boolean = false,
        @SerialName("shipping_class") val shippingClass: String = "",
        @SerialName("shipping_class_id") val shippingClassId: Int = 0,
        @SerialName("reviews_allowed") val reviewsAllowed: Boolean = false,
        @SerialName("average_rating") val averageRating: String = "",
        @SerialName("rating_count") val ratingCount: Int = 0,
        @SerialName("related_ids") val relatedIds: List<Int> = listOf(),
        @SerialName("upsell_ids") val upsellIds: List<Int> = listOf(),
        @SerialName("cross_sell_ids") val crossSellIds: List<Int> = listOf(),
        @SerialName("parent_id") val parentId: Int = 0,
        @SerialName("purchase_note") val purchaseNote: String = "",

        val categories: List<ProductCategory> = listOf(),
        val images: List<ProductImage> = listOf(),
        val attributes: List<ProductAttribute> = listOf(),
        val variations: List<Int> = listOf()
)

注意：date_created，stock_status

quicktype.io

是一个很好的在线工具，可以根据json原始数据生成数据类。

编辑：刚刚发现cloud9是两年前被亚马逊收购的，您不能再创建一个帐户来查看公共工作区。 这是link to the filesystem

答案 1 :(得分：0)

我已经尝试过了，无法复制您的问题。您可以提供一个可以查看问题的github存储库吗？

您的pastebin链接中的JSON中有一个问题，就是缺少stock_status值，所以我遇到了这个错误：kotlinx.serialization.MissingFieldException: Field stock_status is required, but it was missing

但是，一旦我将该值添加到JSON中，我就可以反序列化它。

这是我使用的代码：

import kotlinx.serialization.*
import kotlinx.serialization.json.JSON
import java.io.File

val product = JSON(strictMode = false).parseList<Product>(File("./serializationTest.json").readText())

另一件事是，根据documentation

  

使用Kotlin序列化需要Kotlin编译器1.3.0或更高版本。

Kotlin 1.3才是最近才正式发布的，那么您可能使用的是候选发布版本或其他东西，而不是正式版本（对我有用）。也许将所有依赖项更新到最新版本，然后重试？

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