我有来自服务的以下 JSON 响应。
{
"ProductsByCategory": [
{
"id": 2593,
"name": "LeJen Wrap",
"slug": "lejen-wrap",
"permalink": "https://shop.vivachoc.com/product/lejen-wrap/",
"date_created": "2018-05-26T01:20:14",
"date_created_gmt": "2018-05-26T01:20:14",
"date_modified": "2018-05-27T13:30:25",
"date_modified_gmt": "2018-05-27T13:30:25",
"type": "variable",
"status": "publish",
"featured": false,
"catalog_visibility": "visible",
"description": "",
"short_description": "",
"sku": "",
"price": "1",
"regular_price": "",
"sale_price": "",
"date_on_sale_from": null,
"date_on_sale_from_gmt": null,
"date_on_sale_to": null,
"date_on_sale_to_gmt": null,
"price_html": "<span class=\"woocommerce-Price-amount amount\">
]
}
我目前正在使用 GSON 来解析响应。这是我解析 Gson 的 java 代码。然后我使用一个集合来保存 https://github.com/google/gson/blob/master/UserGuide.md 之后的数据作为指南。
Gson gson = new Gson();
Type collectionType = new TypeToken<Collection<ProductsByCategory>>(){}.getType();
Collection<ProductsByCategory> productItems = gson.fromJson(mMessage, collectionType);
商品分类类如下:
public class ProductsByCategory {
@SerializedName("id")
@Expose
private Integer id;
@SerializedName("name")
@Expose
private String name;
@SerializedName("slug")
@Expose
private String slug;
@SerializedName("permalink")
@Expose
private String permalink;
@SerializedName("date_created")
@Expose
private String dateCreated;
@SerializedName("date_created_gmt")
@Expose
private String dateCreatedGmt;
@SerializedName("date_modified")
@Expose
private String dateModified;
@SerializedName("date_modified_gmt")
@Expose
private String dateModifiedGmt;
@SerializedName("type")
@Expose
private String type;
@SerializedName("status")
@Expose
private String status;
@SerializedName("featured")
@Expose
private Boolean featured;
@SerializedName("catalog_visibility")
@Expose
private String catalogVisibility;
@SerializedName("description")
@Expose
private String description;
@SerializedName("short_description")
@Expose
private String shortDescription;
@SerializedName("sku")
@Expose
private String sku;
@SerializedName("price")
@Expose
private String price;
@SerializedName("regular_price")
@Expose
private String regularPrice;
@SerializedName("sale_price")
@Expose
private String salePrice;
@SerializedName("date_on_sale_from")
@Expose
private Object dateOnSaleFrom;
@SerializedName("date_on_sale_from_gmt")
@Expose
private Object dateOnSaleFromGmt;
@SerializedName("date_on_sale_to")
@Expose
private Object dateOnSaleTo;
@SerializedName("date_on_sale_to_gmt")
@Expose
private Object dateOnSaleToGmt;
@SerializedName("price_html")
@Expose
private String priceHtml;
@SerializedName("on_sale")
@Expose
private Boolean onSale;
@SerializedName("purchasable")
@Expose
private Boolean purchasable;
@SerializedName("total_sales")
@Expose
private Integer totalSales;
@SerializedName("virtual")
@Expose
private Boolean virtual;
@SerializedName("downloadable")
@Expose
private Boolean downloadable;
@SerializedName("downloads")
@Expose
private List<Object> downloads = null;
@SerializedName("download_limit")
@Expose
private Integer downloadLimit;
@SerializedName("download_expiry")
@Expose
private Integer downloadExpiry;
@SerializedName("external_url")
@Expose
private String externalUrl;
@SerializedName("button_text")
@Expose
private String buttonText;
@SerializedName("tax_status")
@Expose
private String taxStatus;
@SerializedName("tax_class")
@Expose
private String taxClass;
@SerializedName("manage_stock")
@Expose
private Boolean manageStock;
@SerializedName("stock_quantity")
@Expose
private Object stockQuantity;
@SerializedName("in_stock")
@Expose
private Boolean inStock;
@SerializedName("backorders")
@Expose
private String backorders;
@SerializedName("backorders_allowed")
@Expose
private Boolean backordersAllowed;
@SerializedName("backordered")
@Expose
private Boolean backordered;
@SerializedName("sold_individually")
@Expose
private Boolean soldIndividually;
@SerializedName("weight")
@Expose
private String weight;
@SerializedName("dimensions")
@Expose
private Dimensions dimensions;
@SerializedName("shipping_required")
@Expose
private Boolean shippingRequired;
@SerializedName("shipping_taxable")
@Expose
private Boolean shippingTaxable;
@SerializedName("shipping_class")
@Expose
private String shippingClass;
@SerializedName("shipping_class_id")
@Expose
private Integer shippingClassId;
@SerializedName("reviews_allowed")
@Expose
private Boolean reviewsAllowed;
@SerializedName("average_rating")
@Expose
private String averageRating;
@SerializedName("rating_count")
@Expose
private Integer ratingCount;
@SerializedName("related_ids")
@Expose
private List<Integer> relatedIds = null;
@SerializedName("upsell_ids")
@Expose
private List<Object> upsellIds = null;
@SerializedName("cross_sell_ids")
@Expose
private List<Object> crossSellIds = null;
@SerializedName("parent_id")
@Expose
private Integer parentId;
@SerializedName("purchase_note")
@Expose
private String purchaseNote;
@SerializedName("categories")
@Expose
private List<Category> categories = null;
@SerializedName("tags")
@Expose
private List<Object> tags = null;
@SerializedName("images")
@Expose
private List<Image> images = null;
@SerializedName("attributes")
@Expose
private List<Attribute> attributes = null;
@SerializedName("default_attributes")
@Expose
private List<Object> defaultAttributes = null;
@SerializedName("variations")
@Expose
private List<Integer> variations = null;
@SerializedName("grouped_products")
@Expose
private List<Object> groupedProducts = null;
@SerializedName("menu_order")
@Expose
private Integer menuOrder;
@SerializedName("meta_data")
@Expose
private List<MetaDatum> metaData = null;
@SerializedName("_links")
@Expose
private Links links;
但是，我不断收到以下错误
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $
我没有正确遵循这个吗？我有以下包装项目的类。
public class ProductItems {
@SerializedName("ProductsByCategory")
@Expose
private List<ProductsByCategory> productsByCategory = null;
public List<ProductsByCategory> getProductsByCategory() {
return productsByCategory;
}
public void setProductsByCategory(List<ProductsByCategory> productsByCategory) {
this.productsByCategory = productsByCategory;
}
最佳答案
此错误表明需要一个 JsonArray，但提供的 JSON 是一个 JsonObject。看看你的 JSON，在顶层你有一个名为 "ProductsByCategory" 的 JsonObject。因此，您需要传递 JsonObject“ProductsByCategory”的内容，它是一个 JsonArray。
您可以执行以下操作:
Gson gson = new Gson();
Type collectionType = new TypeToken<Collection<ProductsByCategory>>(){}.getType();
Collection<ProductsByCategory> productItems = gson.fromJson(mMessage.getAsJsonArray("ProductsByCategory"), collectionType);
如果您已经有一个包装类(“ProductItems”)，您必须按如下方式修复您的代码:
Gson gson = new Gson();
Type collectionType = new TypeToken<ProductItems>(){}.getType();
ProductItems productItems = gson.fromJson(mMessage, collectionType);
关于java - Gson解析集合，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50556505/