Java 来自Jackson库的无法识别的属性异常
我有如下Java 来自Jackson库的无法识别的属性异常,java,jackson,jackson-databind,Java,Jackson,Jackson Databind,我有如下JSONpaylaod: { "status": "ok", "result": { "result": [ { "product_id": "1420-131617-82", "sku": "1420-131617", "display_sku": "8DD 355 100-411", "genart_number": 82, "name": "Bremsscheibe",
JSON
paylaod
:
{
"status": "ok",
"result": {
"result": [
{
"product_id": "1420-131617-82",
"sku": "1420-131617",
"display_sku": "8DD 355 100-411",
"genart_number": 82,
"name": "Bremsscheibe",
"description": null,
"additional_info_text": null,
"product_url": "https://www.autoteile5000.de/product/1420-131617-82",
"image_url": "https://static.autoteile5000.de/product-images/HLP/4625-462502682-3-255-1548045462267.jpg",
"brand": "HELLA PAGID",
"eans": [
"4082300365078"
],
"manufacturer_product_number": "8DD 355 100-411",
"data_supplier_number": "4625",
"pricehammer": false,
"buyable": true,
"bulky_good": false,
"risky_good": false,
"hazardous_good": false,
"car_specific": true,
"has_deposit": false,
"is_exchange_part": false,
"visibility_status": "active",
"deleted": false
}
]
}
}
这是我反序列化它的方法:
public List<SimpleProductDto> getProducts(ProductForm productForm) {
JsonParser jsonParser = new JsonParser();
try (InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("data/product/2210-0929-818/product.json") ) {
String text = IOUtils.toString(inputStream, StandardCharsets.UTF_8.name());
//System.out.println("print text : " + text);
//Read JSON file
JsonObject objectFromString = jsonParser.parse(text).getAsJsonObject();
// System.out.println(objectFromString.toString());
JsonObject objectFromString1 = objectFromString.getAsJsonObject("result");
// System.out.println(objectFromString.toString());
// System.out.println(objectFromString1.toString());
JsonArray jsonArray = objectFromString1.getAsJsonArray("result");
System.out.println("printing json array : " +jsonArray.toString());
ObjectMapper oMapper = new ObjectMapper();
for(JsonElement element : jsonArray){
JsonObject productObj = element.getAsJsonObject();
System.out.println("printing json object : " + productObj.toString());
SimpleproductDtoMapper productDtoList = oMapper.readValue(productObj.toString(), SimpleproductDtoMapper.class);
}
// List<SimpleproductDtoMapper> productDtoList = oMapper.readValue(jsonArray.toString(), new TypeReference<List<SimpleproductDtoMapper>>() {});
// Map<String, SimpleproductDtoMapper> items = productDtoList.stream().collect(Collectors.toMap(SimpleproductDtoMapper::getProductId, Function.identity()));
//items.forEach((k, v) -> System.out.println("Item : " + k + " Count : " + v));
//Iterate over employee array
//productList.forEach(emp -> parseProductObject((JSONObject) emp));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
我得到以下例外情况:
在[来源:
(字符串)“{”产品id:“1420-131617-82”,“sku:“1420-131617”,“显示sku:“8DD”
355
100-411,“genart_编号”:82,“名称”:“勃拉姆斯基”,“描述”:null,“附加信息文本”:null,“产品url”:“图像url”:“品牌”:“HELLA”
PAGID,“eans”:[“408230365078”],“制造商产品编号”:“8DD 355”
100-411,“数据供应商编号”:“4625”,“价格锤”:假,“可购买”:tr“[截断
174个字符];行:1,列:16](通过引用链:
com.kfz24.mockingservice.mapper.SimpleproductDtoMapper[“产品id”])
在
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:61)
在
com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty(DeserializationContext.java:823)
在
com.fasterxml.jackson.databind.desr.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:1153)
在
com.fasterxml.jackson.databind.deser.beandserializerbase.handleUnknownProperty(beandserializerbase.java:1589)
在
com.fasterxml.jackson.databind.deser.beandserializerbase.handleUnknownVanilla(beandserializerbase.java:1567)
在
com.fasterxml.jackson.databind.deser.BeandSerializer.vanillaDeserialize(BeandSerializer.java:294)
在
deserialize(beandSerializer.java:151)
在
com.fasterxml.jackson.databind.ObjectMapper.\u readMapAndClose(ObjectMapper.java:4013)
位于com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3004)
位于com.kfz24.mockingservice.service.impl.MockingProductServiceImpl.getProducts(MockingProductServiceImpl.java:49)
位于com.kfz24.mockingservice.controller.MockingProductController.getProducts(MockingProductController.java:29)
因为
@SerializedName
来自Gson,而不是Jackson。Jackson中的等价物是@JsonProperty
因此,将所有@SerializedName
更改为@JsonProperty
。此外,默认情况下,Jackson仅在未标记@JsonProperty
的情况下反序列化公共字段
因此,对于您来说,我建议最简单的方法是确保所有字段都标记有
@JsonProperty
(例如名称、品牌等),因为@SerializedName
来自Gson,而不是Jackson。Jackson中的等价物是@JsonProperty
因此,将所有@SerializedName
更改为@JsonProperty
。此外,默认情况下,Jackson仅在未标记@JsonProperty
的情况下反序列化公共字段
因此,对于您来说,我建议最简单的方法是确保所有字段都标记有@JsonProperty
(例如名称、品牌等)使用可以生成带有Jackson
注释的POJO
类。选择Jackson 2.x
以生成带有Jackson
注释的模型。源类型应为JSON
。下面可以看到我使用此工具生成的产品
类。所有属性都是公共属性
,因此将它们更改为private
,并生成getter
和setter
class Product {
@JsonProperty("product_id")
public String productId;
@JsonProperty("sku")
public String sku;
@JsonProperty("display_sku")
public String displaySku;
@JsonProperty("genart_number")
public Integer genartNumber;
@JsonProperty("name")
public String name;
@JsonProperty("description")
public Object description;
@JsonProperty("additional_info_text")
public Object additionalInfoText;
@JsonProperty("product_url")
public String productUrl;
@JsonProperty("image_url")
public String imageUrl;
@JsonProperty("brand")
public String brand;
@JsonProperty("eans")
public List<String> eans = null;
@JsonProperty("manufacturer_product_number")
public String manufacturerProductNumber;
@JsonProperty("data_supplier_number")
public String dataSupplierNumber;
@JsonProperty("pricehammer")
public Boolean pricehammer;
@JsonProperty("buyable")
public Boolean buyable;
@JsonProperty("bulky_good")
public Boolean bulkyGood;
@JsonProperty("risky_good")
public Boolean riskyGood;
@JsonProperty("hazardous_good")
public Boolean hazardousGood;
@JsonProperty("car_specific")
public Boolean carSpecific;
@JsonProperty("has_deposit")
public Boolean hasDeposit;
@JsonProperty("is_exchange_part")
public Boolean isExchangePart;
@JsonProperty("visibility_status")
public String visibilityStatus;
@JsonProperty("deleted")
public Boolean deleted;
@Override
public String toString() {
return "Product{" +
"productId='" + productId + '\'' +
", sku='" + sku + '\'' +
", displaySku='" + displaySku + '\'' +
", genartNumber=" + genartNumber +
", name='" + name + '\'' +
", description=" + description +
", additionalInfoText=" + additionalInfoText +
", productUrl='" + productUrl + '\'' +
", imageUrl='" + imageUrl + '\'' +
", brand='" + brand + '\'' +
", eans=" + eans +
", manufacturerProductNumber='" + manufacturerProductNumber + '\'' +
", dataSupplierNumber='" + dataSupplierNumber + '\'' +
", pricehammer=" + pricehammer +
", buyable=" + buyable +
", bulkyGood=" + bulkyGood +
", riskyGood=" + riskyGood +
", hazardousGood=" + hazardousGood +
", carSpecific=" + carSpecific +
", hasDeposit=" + hasDeposit +
", isExchangePart=" + isExchangePart +
", visibilityStatus='" + visibilityStatus + '\'' +
", deleted=" + deleted +
'}';
}
}
以上代码打印:
[Product{productId='1420-131617-82', sku='1420-131617', displaySku='8DD 355 100-411', genartNumber=82, name='Bremsscheibe', description=null, additionalInfoText=null, productUrl='https://www.autoteile5000.de/product/1420-131617-82', imageUrl='https://static.autoteile5000.de/product-images/HLP/4625-462502682-3-255-1548045462267.jpg', brand='HELLA PAGID', eans=[4082300365078], manufacturerProductNumber='8DD 355 100-411', dataSupplierNumber='4625', pricehammer=false, buyable=true, bulkyGood=false, riskyGood=false, hazardousGood=false, carSpecific=true, hasDeposit=false, isExchangePart=false, visibilityStatus='active', deleted=false}]
使用可以生成带有Jackson
注释的POJO
类。选择Jackson 2.x
以生成带有Jackson
注释的模型。源类型应为JSON
。下面可以看到使用此工具生成的Product
类。所有属性都是public
>,因此将它们更改为private
,并生成getter
和setter
class Product {
@JsonProperty("product_id")
public String productId;
@JsonProperty("sku")
public String sku;
@JsonProperty("display_sku")
public String displaySku;
@JsonProperty("genart_number")
public Integer genartNumber;
@JsonProperty("name")
public String name;
@JsonProperty("description")
public Object description;
@JsonProperty("additional_info_text")
public Object additionalInfoText;
@JsonProperty("product_url")
public String productUrl;
@JsonProperty("image_url")
public String imageUrl;
@JsonProperty("brand")
public String brand;
@JsonProperty("eans")
public List<String> eans = null;
@JsonProperty("manufacturer_product_number")
public String manufacturerProductNumber;
@JsonProperty("data_supplier_number")
public String dataSupplierNumber;
@JsonProperty("pricehammer")
public Boolean pricehammer;
@JsonProperty("buyable")
public Boolean buyable;
@JsonProperty("bulky_good")
public Boolean bulkyGood;
@JsonProperty("risky_good")
public Boolean riskyGood;
@JsonProperty("hazardous_good")
public Boolean hazardousGood;
@JsonProperty("car_specific")
public Boolean carSpecific;
@JsonProperty("has_deposit")
public Boolean hasDeposit;
@JsonProperty("is_exchange_part")
public Boolean isExchangePart;
@JsonProperty("visibility_status")
public String visibilityStatus;
@JsonProperty("deleted")
public Boolean deleted;
@Override
public String toString() {
return "Product{" +
"productId='" + productId + '\'' +
", sku='" + sku + '\'' +
", displaySku='" + displaySku + '\'' +
", genartNumber=" + genartNumber +
", name='" + name + '\'' +
", description=" + description +
", additionalInfoText=" + additionalInfoText +
", productUrl='" + productUrl + '\'' +
", imageUrl='" + imageUrl + '\'' +
", brand='" + brand + '\'' +
", eans=" + eans +
", manufacturerProductNumber='" + manufacturerProductNumber + '\'' +
", dataSupplierNumber='" + dataSupplierNumber + '\'' +
", pricehammer=" + pricehammer +
", buyable=" + buyable +
", bulkyGood=" + bulkyGood +
", riskyGood=" + riskyGood +
", hazardousGood=" + hazardousGood +
", carSpecific=" + carSpecific +
", hasDeposit=" + hasDeposit +
", isExchangePart=" + isExchangePart +
", visibilityStatus='" + visibilityStatus + '\'' +
", deleted=" + deleted +
'}';
}
}
以上代码打印:
[Product{productId='1420-131617-82', sku='1420-131617', displaySku='8DD 355 100-411', genartNumber=82, name='Bremsscheibe', description=null, additionalInfoText=null, productUrl='https://www.autoteile5000.de/product/1420-131617-82', imageUrl='https://static.autoteile5000.de/product-images/HLP/4625-462502682-3-255-1548045462267.jpg', brand='HELLA PAGID', eans=[4082300365078], manufacturerProductNumber='8DD 355 100-411', dataSupplierNumber='4625', pricehammer=false, buyable=true, bulkyGood=false, riskyGood=false, hazardousGood=false, carSpecific=true, hasDeposit=false, isExchangePart=false, visibilityStatus='active', deleted=false}]
感谢您的回复..但是私有visibilityStatus到visibilityStatus是一个对象,@JsonProperty(“visibility\u status”)不适用于object?@Vinayanyak,在您的JSON
payload“visibility\u status”中:“活动”
是一个字符串
而不是对象
。这JSON
是否正确?如果正确,请更新您的模型。public enum VisibilityStatusDto{ACTIVE(1),INACTIVE(2);private Integer id;private VisibilityStatusDto(Integer id){this.id=id;}public Integer getId(){return this.id;}
这是一个枚举,但来自其他服务的json负载将其作为字符串发送。我如何将此字符串映射到mu模型中的枚举类型?请查看一下。让我知道结果是什么。感谢帮助!!感谢您的回复..但是private VisibilityStatusDto visibilityStatus是一个对象和@JsonProperty(“可见性状态”对对象不起作用?@VinayaNayak,在您的JSON
payload“可见性状态”中:“活动的”
是一个字符串,而不是Object
。这JSON
正确吗?如果正确,请更新您的模型。public enum VisibilityStatusDto{active(1),INACTIVE(2);private Integer id;private VisibilityStatusDto(Integer id){this.id=id;}public Integer getId(){return this.id;}}
这是一个枚举,但来自其他服务的json负载将其作为字符串发送。如何将此字符串映射到mu模型中的枚举类型?请查看此项。让我知道结果。感谢帮助!!