我有一个如下所示的 XML 文档，并希望对其执行解码
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sh="http://www.w3.org/2001/XMLSchema-instance">
<SOAP-ENV:Body>
<people xmlns="http://ccm.intra.bt.com/manageServiceFault/2006/06"
xmlns:cds="http://capabilities.nat.bt.com/xsd/manageServiceFault/2010/06/Contact/Details"
xmlns:sh="http://wsi.nat.bt.com/2005/06/StandardHeader/"
xsi:schemaLocation="http://ccm.intra.bt.com/manageServiceFault/2006/06 MSF_5.0.xsd">
<cds:address>
<cds:Address>
<cds:postTown>London</cds:postTown>
<cds:postCode>WC2E 7AT</cds:postCode>
<cds:thoroughfareName>Bow Street</cds:thoroughfareName>
<cds:dependentLocality>local123</cds:dependentLocality>
<cds:county>London</cds:county>
<cds:thoroughfareNumber>30-34</cds:thoroughfareNumber>
<cds:subPremise>2nd Floor</cds:subPremise>
<cds:buildingName>BT tower</cds:buildingName>
<cds:buildingNumber>Lot 1234</cds:buildingNumber>
<cds:locality>London</cds:locality>
<cds:premise>Covent Garden Exchange</cds:premise>
<cds:dependentThoroughfare>345</cds:dependentThoroughfare>
<cds:poBox>PO1234</cds:poBox>
</cds:Address>
<cds:Address>
<cds:postTown>New York</cds:postTown>
<cds:postCode>WC2E 7AT</cds:postCode>
<cds:thoroughfareName>Bow Street</cds:thoroughfareName>
<cds:dependentLocality>local123</cds:dependentLocality>
<cds:county>US</cds:county>
<cds:thoroughfareNumber>30-34</cds:thoroughfareNumber>
<cds:subPremise>2nd Floor</cds:subPremise>
<cds:buildingName>BT tower</cds:buildingName>
<cds:buildingNumber>Lot 1234</cds:buildingNumber>
<cds:locality>US</cds:locality>
<cds:premise>Covent Garden Exchange</cds:premise>
<cds:dependentThoroughfare>345</cds:dependentThoroughfare>
<cds:poBox>PO1234</cds:poBox>
</cds:Address>
<cds:country>
<cds:name>UK</cds:name>
</cds:country>
<cds:country>
<cds:name>US</cds:name>
</cds:country>
</cds:address>
</people>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
请注意，元素地址包含一个或多个地址和国家/地区元素。地址和地址相同，只是 A 不同。以下是我的域类
People2.java
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
@XmlRootElement(name = "people")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(namespace = "http://capabilities.nat.bt.com/xsd/manageServiceFault/2010/06/Contact/Details")
public class People2 {
@XmlElement(name = "address")
private Addresses addresses;
public Addresses getAddresses() {
return addresses;
}
public void setAddresses(Addresses addresses) {
this.addresses = addresses;
}
}
地址.java
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlType;
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(namespace = "http://capabilities.nat.bt.com/xsd/manageServiceFault/2010/06/Contact/Details")
public class Addresses {
@XmlElementWrapper(name = "address")
@XmlElement(name = "Address")
private List<Address> address;
@XmlElementWrapper(name = "address")
@XmlElement(name = "country")
private List<Country> country;
public Addresses() {
address = new ArrayList<Address>();
country = new ArrayList<Country>();
}
public List<Address> getAddress() {
return address;
}
public void setAddress(List<Address> address) {
this.address = address;
}
public List<Country> getCountry() {
return country;
}
public void setCountry(List<Country> country) {
this.country = country;
}
}
下面是我解码 XML 的主要代码
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
public class Demo2 {
public static void main(String[] args) throws FileNotFoundException, XMLStreamException, JAXBException,
IllegalAccessException, IllegalArgumentException, InvocationTargetException, IntrospectionException {
XMLInputFactory xif = XMLInputFactory.newInstance();
XMLStreamReader xsr = xif.createXMLStreamReader(new FileReader("./xml/Testing2.xml"));
JAXBContext jc = JAXBContext.newInstance(People2.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
xsr.nextTag();
System.out.println("Current XML element: " + xsr.getLocalName());
xsr.nextTag();
System.out.println("Current XML element: " + xsr.getLocalName());
int tag = xsr.nextTag();
if (tag == XMLStreamConstants.START_ELEMENT) {
System.out.println("Current XML element: " + xsr.getLocalName());
People2 people = (People2) unmarshaller.unmarshal(xsr);
for (PropertyDescriptor propertyDescriptor : Introspector.getBeanInfo(People2.class, Object.class)
.getPropertyDescriptors()) {
Method method = propertyDescriptor.getReadMethod();
System.out.println("Class name: " + people.getClass().getSimpleName() + ", Method: " + method.getName()
+ ", Value: " + method.invoke(people));
}
Addresses addresses = people.getAddresses();
for (PropertyDescriptor propertyDescriptor : Introspector.getBeanInfo(Addresses.class, Object.class)
.getPropertyDescriptors()) {
Method method = propertyDescriptor.getReadMethod();
System.out.println("Class name: " + addresses.getClass().getSimpleName() + ", Method: "
+ method.getName() + ", Value: " + method.invoke(addresses));
}
}
}
}
问题是，当在 Addresses 中打印方法时，getAddress 和 getCountry 的值返回 null，如下所示。看来绑定(bind)没有发生。
Current XML element: Envelope
Current XML element: Body
Current XML element: people
Class name: People2, Method: getAddresses, Value: com.bt.platform.automation.domain.Addresses@433c675d
Class name: Addresses, Method: getAddress, Value: []
Class name: Addresses, Method: getCountry, Value: []
如果我在Addresses.java中删除这个@XmlElementWrapper(name = "address")，它的工作原理如下
Current XML element: Envelope
Current XML element: Body
Current XML element: people
Class name: People2, Method: getAddresses, Value: com.bt.platform.automation.domain.Addresses@2e817b38
Class name: Addresses, Method: getAddress, Value: [com.bt.platform.automation.domain.Address@c4437c4, com.bt.platform.automation.domain.Address@433c675d]
Class name: Addresses, Method: getCountry, Value: [com.bt.platform.automation.domain.Country@3f91beef, com.bt.platform.automation.domain.Country@1a6c5a9e]
任何人都可以帮忙，如果我不删除 @XmlElementWrapper(name = "address")，为什么它不能按预期工作？我引用过这篇文章 - http://blog.bdoughan.com/2010/09/jaxb-collection-properties.html但它似乎不适用于我的代码。
最佳答案
我认为您误解了 @XmlElementWrapper 的用途。
为了举例，假设您的地址元素仅包含 Address 元素。
然后您可以使用以下代码，并删除 Adresses 类的必要性:
@XmlRootElement(name = "people")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(namespace = "http://capabilities.nat.bt.com/xsd/manageServiceFault/2010/06/Contact/Details")
public class People2 {
@XmlElement(name = "Address")
@XmlElementWrapper(name = "address")
private List<Address> addresses;
public List<Address> getAddresses() {
return addresses;
}
public void setAddresses(List<Address> addresses) {
this.addresses = addresses;
}
}
@XmlElementWrapper 的存在就是为了这个目的，因为我们倾向于在给定元素的列表周围放置一个包装器元素，因此它将强制使用中间类。
关于java - 无法使用 @XmlElementWrapper 解码与父元素具有相同名称的 XML 相同元素列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44364754/