无法使用@XmlElementWrapper解析与父元素具有相同名称的XML相同元素的列表 [英] Fails to unmarshal list of XML same elements having same name as parents elements using @XmlElementWrapper
问题描述
我有一个如下所示的XML文档，并希望对其进行解组
I have a XML document like below and would like to perform unmarshalling against it
<?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Address和Country元素。地址和地址都相同，只是A差异。以下是我的域类
Notice that element address contains one or more than one Address and Country elements. Both address and Address are same same just only the A difference. Below are my domain classes
People2.java
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;
}
}
Addresses.java
Addresses.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;
}
}
以下是我的主要代码解组XML
and below is my main code to unmarshal the XML
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，当在地址中打印方法时，getAddress和getCountry的值返回null，如下所示。似乎绑定没有发生。
Problem is, when printing methods in Addresses, value of getAddress and getCountry returns null like below. It seems the binding is not happening.
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: []
如果我删除这个Addresses.java中的 @XmlElementWrapper（name =address），它可以正常工作
If I remove this @XmlElementWrapper(name = "address") in Addresses.java, it works fine like below
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]
Cany任何人请帮助，如果我不删除 @XmlElementWrapper（name =address），为什么它没有按预期工作？我已经提到过这篇文章 - http://blog.bdoughan.com /2010/09/jaxb-collection-properties.html 但它似乎不适合我的代码。
Cany anyone please help why is it not working as expected if I don't remove @XmlElementWrapper(name = "address")? I have referred to this post - http://blog.bdoughan.com/2010/09/jaxb-collection-properties.html but it doesn't seems working for my code.
推荐答案
我认为你误解了@XmlElementWrapper的用途。
I think you're misunderstanding what @XmlElementWrapper is used for.
为了这个例子，假设你的地址元素只包含地址元素。
For the sake of the exemple, let's say that your address element only contains Address elements.
然后你可以使用下面的代码，并删除你的Adresses课程的必要性：
Then you could use the following code, and remove the necessity of your Adresses class :
@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是为了这个，因为我们倾向于在给定元素列表周围放置一个包装元素，因此它会强制使用中间类。
@XmlElementWrapper exists for the sake of this, as we tend to put a wrapper element around a list of given elements, and thus it would force to use an intermediary class.
这篇关于无法使用@XmlElementWrapper解析与父元素具有相同名称的XML相同元素的列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
