无法将 JSON 响应从 com.sun.jersey.api.client.ClientResponse 映射到 PO

Question

我正在尝试将 JSON 响应映射到 POJO，某些属性(属性以 @ 开头(无法映射，因此我收到以下错误。

请找到 JSON 和类文件，在 POJO 上要做哪些更改以映射下面提到的 JSON 中的所有属性？

杰伦

{
"@customerId": "123456",
"customerName": "Jobin",
"orders": [
{
"orderId": "bvbundle002075",
"address": {
"@elid": "35475908"
},
}
]
}

客户.java

import java.util.List;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
@XmlRootElement
@XmlType
public class CustomerData implements Serializable {
private static final long serialVersionUID = 9163262900343406982L;
private String customerId;
private String customerName;
private List<Order> orders;
@XmlElement(name = "@customerId")
public String getCustomerId() {
return customerId;
}
public void setCustomerId(final String customerId) {
this.customerId = customerId;
}

public String getCustomerName() {
return customerId;
}
public void setCustomerName(final String customerName) {
this.customerName = customerName;
}
public List<Order> getOrders() {
return orders;
}
public void setExistingProducts(final List<Order> orders) {
this.orders = orders;
}
}

序.java

class Order implements Serializable {
private static final long serialVersionUID = 1L;
private String orderId;
private Address address;
public String getOrderId() {
return orderId;
}
public void setOrderId(final String orderId) {
this.orderId = orderId;
}
public Address getAddress() {
return address;
}
public void setAddress(final Address address) {
this.address = address;
}
}

地址.java

class Address implements Serializable {
private static final long serialVersionUID = 1L;
private String elid;
@XmlElement(name = "@elid")
public String getElid() {
return elid;
}
public void setElid(String elid) {
this.elid = elid;
}
}

错误日志

javax.ws.rs.WebApplicationException: javax.xml.bind.UnmarshalException
- with linked exception:
[javax.xml.stream.XMLStreamException: java.lang.NullPointerException]
at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:113)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:634)
at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.xml.bind.UnmarshalException: null
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unknown Source)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(Unknown Source)
at com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalJAXBElementFromJSON(BaseJSONUnmarshaller.java:111)
at com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalFromJSON(BaseJSONUnmarshaller.java:100)
at com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider.readFrom(JSONRootElementProvider.java:154)
at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:111)
... 144 common frames omitted
Caused by: javax.xml.stream.XMLStreamException: java.lang.NullPointerException
at com.sun.jersey.json.impl.reader.XmlEventProvider.processTokens(XmlEventProvider.java:421)
at com.sun.jersey.json.impl.reader.XmlEventProvider.readNext(XmlEventProvider.java:466)
at com.sun.jersey.json.impl.reader.JsonXmlStreamReader.next(JsonXmlStreamReader.java:506)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(Unknown Source)
... 150 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.sun.jersey.json.impl.reader.XmlEventProvider.processTokens(XmlEventProvider.java:315)

Answer 1

问题是我试图将 xml 属性映射到 xml 元素。如果您转换响应中提到的上述 JSON，这将生成如下所示的 XML。

<?xml version="1.0" encoding="UTF-8"?>
<root customerId="123456">
<customerName>Jobin</customerName>
<orders>
<element>
<address elid="35475908" />
<orderId>bvbundle002075</orderId>
</element>
</orders>
</root>

如您所见customerId和elid是 XML 属性而不是元素。

所以我不得不使用下面的来修复它，

@XmlAttribute(name = "customerNumber")  //will map to @customerNumber in JSON
@XmlAttribute(name = "elid")            //will map to @elid in JSON