我正在处理一个项目，在该项目中我将与返回JSON响应的第三方服务进行集成。我正在使用Jackson将反应序列化为Java POJO。答案是一个有几个简单字段的对象，Jackson可以轻松解析。但是，响应也包含一个数组，其中也包含一个对象。当Jackson试图反序列化它时，我得到包含列表中单个条目的列表的顶级对象，但列表中单个条目的所有字段均为空。任何想法我在这里做错了吗？Jackson：使用对象数组解析对象
更新：设置FAIL_ON_UNKNOWN_PROPERTIES为真后，我得到以下堆栈跟踪。仍然不确定为什么数组中包含“RecurringDetail”对象存在问题。无法识别的字段“RecurringDetail”（com.adyen.www.models.RecurringDetail类），未标记为可忽略的（19个已知属性：“variant”，“contractTypes” ，“tokenDetails”，“aliasType”，“name”，“creationDate”，“firstPspReference”，“elv”，“card”，“additionalData”，“shopperName”，“socialSecurityNumber”，“billingAddress”，“bank” recurringDetailReference“，”paymentMethodVariant“，”alias“，”acquirer“，”acquirerAccount“]） at [Source：response.json; line：5，column：33]（通过引用链：com.adyen.www.models.RecurringDetailsResult [“details”] - > java.util.ArrayList [0] - > com.adyen.www.models.RecurringDetail [ RecurringDetail“]） 在com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from（UnrecognizedPropertyException.java:62） 在com.fasterxml.jackson.databind.DeserializationContext.handleUnknownProperty（DeserializationContext.java:834） 在融为一体。 fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty（StdDeserializer.java:1094） 在com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty（BeanDeserializerBase.java:1470） 在com.fasterxml.jackson。 databind.deser.BeanDeserializerBase.handleUnknownVanilla（BeanDeserializerBase.java:1448） at com.fasterxml.jackson.databind.deser.BeanDeserializer .vanillaDeserialize（BeanDeserializer.java:282） at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize（BeanDeserializer.java:140） at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize（CollectionDeserializer .java：287） at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize（CollectionDeserializer.java:259） at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize（CollectionDeserializer.java ：26） 在com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize（SettableBeanProperty.java:499） 在com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet（MethodProperty.java:101） 在com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize（BeanDese在com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose（ObjectMapper.java：3798） at com.fasterxml.jackson.databind.ObjectMapper.readValue（ObjectMapper。的java：2759）
JSON
{
"creationDate": "2017-01-26T23:11:20+01:00",
"details": [
{
"RecurringDetail": {
"acquirer": "TestPmmAcquirer",
"acquirerAccount": "TestPmmAcquirerAccount",
"additionalData": {
"cardBin": "440000"
},
"alias": "B133243153928547",
"aliasType": "Default",
"card": {
"expiryMonth": "8",
"expiryYear": "2018",
"holderName": "Steve HAll",
"number": "0008"
},
"contractTypes": [
"RECURRING"
],
"creationDate": "2017-01-26T23:11:20+01:00",
"firstPspReference": "8524854686798738",
"paymentMethodVariant": "visadebit",
"recurringDetailReference": "8414854686802111",
"variant": "visa"
}
}
],
"invalidOneclickContracts": "false",
"lastKnownShopperEmail": "[email protected]",
"shopperReference": "xggZcGauSSG5jP+akIlijQ=="
}
单位测试
public class RecurringDetailResultTest {
public static ObjectMapper mapper = new ObjectMapper()
{
private static final long serialVersionUID = -174113593500315394L;
{
configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
configure(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS, true);
setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
};
@Test
public void testParseRecurringDetailResulte() throws IOException {
RecurringDetailsResult result = mapper.readValue(new File("response.json"), new TypeReference<RecurringDetailsResult>(){});
if (result.getDetails() != null && !result.getDetails().isEmpty()) {
RecurringDetail detail = result.getDetails().get(0);
if (StringUtils.isEmpty(detail.getRecurringDetailReference())) {
fail("Recurring detail does not contain any information.");
}
} else {
fail("No result details returned.");
}
}
}
模型（根对象）
public class RecurringDetailsResult
implements java.io.Serializable {
private static final long serialVersionUID = 5297684963950973136L;
private Date creationDate;
private String shopperReference;
private List<RecurringDetail> details;
private String lastKnownShopperEmail;
@JsonGetter("creationDate")
public Date getCreationDate () {
return this.creationDate;
}
@JsonSetter("creationDate")
public void setCreationDate (Date value) {
this.creationDate = value;
}
@JsonGetter("shopperReference")
public String getShopperReference () {
return this.shopperReference;
}
@JsonSetter("shopperReference")
public void setShopperReference (String value) {
this.shopperReference = value;
}
@JsonGetter("details")
public List<RecurringDetail> getDetails () {
return this.details;
}
@JsonSetter("details")
public void setDetails (List<RecurringDetail> value) {
this.details = value;
}
@JsonGetter("lastKnownShopperEmail")
public String getLastKnownShopperEmail () {
return this.lastKnownShopperEmail;
}
@JsonSetter("lastKnownShopperEmail")
public void setLastKnownShopperEmail (String value) {
this.lastKnownShopperEmail = value;
}
}
模型（阵列中的物体，所有领域的当杰克逊反序列化JSON时，这个人是空的）
public class RecurringDetail
implements java.io.Serializable {
private static final long serialVersionUID = 5302883242997268343L;
private String name;
private Date creationDate;
private Card card;
private ELV elv;
private Address billingAddress;
private String additionalData;
private Name shopperName;
private String socialSecurityNumber;
private String recurringDetailReference;
private BankAccount bank;
private String alias;
private String aliasType;
private TokenDetails tokenDetails;
private String variant;
private String paymentMethodVariant;
private String firstPspReference;
private List<String> contractTypes;
private String acquirer;
private String acquirerAccount;
@JsonGetter("name")
public String getName () {
return this.name;
}
@JsonSetter("name")
public void setName (String value) {
this.name = value;
}
@JsonGetter("creationDate")
public Date getCreationDate () {
return this.creationDate;
}
@JsonSetter("creationDate")
public void setCreationDate (Date value) {
this.creationDate = value;
}
@JsonGetter("card")
public Card getCard () {
return this.card;
}
@JsonSetter("card")
public void setCard (Card value) {
this.card = value;
}
@JsonGetter("elv")
public ELV getElv () {
return this.elv;
}
@JsonSetter("elv")
public void setElv (ELV value) {
this.elv = value;
}
@JsonGetter("billingAddress")
public Address getBillingAddress () {
return this.billingAddress;
}
@JsonSetter("billingAddress")
public void setBillingAddress (Address value) {
this.billingAddress = value;
}
@JsonGetter("additionalData")
public String getAdditionalData () {
return this.additionalData;
}
@JsonSetter("additionalData")
public void setAdditionalData (String value) {
this.additionalData = value;
}
@JsonGetter("shopperName")
public Name getShopperName () {
return this.shopperName;
}
@JsonSetter("shopperName")
public void setShopperName (Name value) {
this.shopperName = value;
}
@JsonGetter("socialSecurityNumber")
public String getSocialSecurityNumber () {
return this.socialSecurityNumber;
}
@JsonSetter("socialSecurityNumber")
public void setSocialSecurityNumber (String value) {
this.socialSecurityNumber = value;
}
@JsonGetter("recurringDetailReference")
public String getRecurringDetailReference () {
return this.recurringDetailReference;
}
@JsonSetter("recurringDetailReference")
public void setRecurringDetailReference (String value) {
this.recurringDetailReference = value;
}
@JsonGetter("bank")
public BankAccount getBank () {
return this.bank;
}
@JsonSetter("bank")
public void setBank (BankAccount value) {
this.bank = value;
}
@JsonGetter("alias")
public String getAlias () {
return this.alias;
}
@JsonSetter("alias")
public void setAlias (String value) {
this.alias = value;
}
@JsonGetter("aliasType")
public String getAliasType () {
return this.aliasType;
}
@JsonSetter("aliasType")
public void setAliasType (String value) {
this.aliasType = value;
}
@JsonGetter("tokenDetails")
public TokenDetails getTokenDetails () {
return this.tokenDetails;
}
@JsonSetter("tokenDetails")
public void setTokenDetails (TokenDetails value) {
this.tokenDetails = value;
}
@JsonGetter("variant")
public String getVariant () {
return this.variant;
}
@JsonSetter("variant")
public void setVariant (String value) {
this.variant = value;
}
@JsonGetter("paymentMethodVariant")
public String getPaymentMethodVariant () {
return this.paymentMethodVariant;
}
@JsonSetter("paymentMethodVariant")
public void setPaymentMethodVariant (String value) {
this.paymentMethodVariant = value;
}
@JsonGetter("firstPspReference")
public String getFirstPspReference () {
return this.firstPspReference;
}
@JsonSetter("firstPspReference")
public void setFirstPspReference (String value) {
this.firstPspReference = value;
}
@JsonGetter("contractTypes")
public List<String> getContractTypes () {
return this.contractTypes;
}
@JsonSetter("contractTypes")
public void setContractTypes (List<String> value) {
this.contractTypes = value;
}
@JsonGetter("acquirer")
public String getAcquirer () {
return this.acquirer;
}
@JsonSetter("acquirer")
public void setAcquirer (String value) {
this.acquirer = value;
}
@JsonGetter("acquirerAccount")
public String getAcquirerAccount () {
return this.acquirerAccount;
}
@JsonSetter("acquirerAccount")
public void setAcquirerAccount (String value) {
this.acquirerAccount = value;
}
}
我试过这个UNWRAP_SINGLE_VALUE_ARRAYS设置为两个真假。我也尝试过将ACCEPT_SINGLE_VALUE_AS_ARRAY设置为true和false。 – Steve
我已将DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES设置为true，现在正在获取此堆栈跟踪 – Steve
您是否可以自由更改json？问题是你的外部对象没有一个根值，但是你的内部对象是这样做的。 – teacurran