让我先谈谈我的问题归结为什么。我正在使用maven-jaxb2-plugin从XSD架构生成一个名为MyServiceResponse的类。生成的MyServiceResponse类包含带有空名称属性的@XmlType注释。
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
})
我想生成带有填充name属性的MyServiceResponse，或者完全没有@XmlType注释。这可能是在XJB文件中使用自定义绑定还是以其他方式使用？在任何情况下，如果可能的话，我想在生成期间解决 ，因为在每次运行Maven插件时，MyserviceResponse的手动编辑都会被覆盖。
下面是一个Java类，它演示了我的实际问题。该类使用XmlStreamReader和JAXB从消息中的任何元素开始解组XML消息。 'xml'变量没有完全解组。 'car'属性保持null。发生这种情况是因为xmlns="http://www.example.com/type"命名空间被XmlStreamReader复制到Body元素，而不是Car子元素。不知怎的，JAXB无法看到我希望它继续解组Car元素。 （这里有大问号）
我已经知道一些修复，但它们涉及对XSD或MyServiceResponse类的手动更改。
首先，我可以在XSD上设置elementFormDefault="qualified"，我从中生成MyServiceResponse类，ObjectFactory和package-info.java。这有效，但它也会导致我的请求XML消息与限定名称空间一起编组，并且我发送消息的服务不接受这一点。此外，它需要更改XSD，我希望尽可能避免。
其次，在Body和Car @XmlType注释上设置名称有效：@XmlType(name = "Body", propOrder = {})和@XmlType(name = "Car", propOrder = {})。但它涉及手动编辑MyServiceResponse。
第三，删除@XmlType(name = "", propOrder = {})注释有效，但也涉及手动编辑MyServiceResponse。
这是一个可复制的演示类：
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.*;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.io.Reader;
import java.io.StringReader;
public class XmlStreamReaderUnmarshallingTest {
private static JAXBContext jaxbContext;
static {
try {
jaxbContext = JAXBContext.newInstance(ObjectFactory.class);
} catch (JAXBException e) {
e.printStackTrace();
}
}
private static String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<soapenv:Envelope xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" \n" +
"\txmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" \n" +
"\txmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n" +
"\t<soapenv:Body>\n" +
"\t\t<response xmlns=\"http://www.example.com/type\">\n" +
"\t\t\t<type:serviceResponse xmlns:type=\"http://www.example.com/type\">\n" +
"\t\t\t\t<Body>\n" +
"\t\t\t\t\t<Car>\n" +
"\t\t\t\t\t\t<Brand>Mitsubishi</Brand>\n" +
"\t\t\t\t\t\t<Color>Red</Color>\n" +
"\t\t\t\t\t</Car>\n" +
"\t\t\t\t</Body>\n" +
"\t\t\t</type:serviceResponse>\n" +
"\t\t</response>\n" +
"\t</soapenv:Body>\n" +
"</soapenv:Envelope>";
private static String xmlStripped = "<type:serviceResponse xmlns:type=\"http://www.example.com/type\">\n" +
"\t\t\t\t<Body>\n" +
"\t\t\t\t\t<Car>\n" +
"\t\t\t\t\t\t<Brand>Mitsubishi</Brand>\n" +
"\t\t\t\t\t\t<Color>Red</Color>\n" +
"\t\t\t\t\t</Car>\n" +
"\t\t\t\t</Body>\n" +
"\t\t\t</type:serviceResponse>";
public static void main(String[] args) throws JAXBException, XMLStreamException {
readXml(xml, "serviceResponse");
readXml(xmlStripped, "serviceResponse");
}
private static void readXml(String inputXml, String startFromElement) throws JAXBException, XMLStreamException {
final XMLInputFactory xmlInputFactory = XMLInputFactory.newFactory();
final Reader reader = new StringReader(inputXml);
final XMLStreamReader xmlStreamReader = xmlInputFactory.createXMLStreamReader(reader);
final XMLStreamReader streamReader = skipToElement(xmlStreamReader, startFromElement);
final MyServiceResponse serviceResponse = (MyServiceResponse) unmarshal(streamReader);
if(serviceResponse.getBody().getCar() == null) {
System.out.println("It didn't work :-(");
} else {
System.out.println("It worked");
}
}
private static XMLStreamReader skipToElement(final XMLStreamReader xsr, final String startAtElement) throws XMLStreamException {
while (startAtElement != null && xsr.hasNext()) {
xsr.next();
if (xsr.hasName()) {
final String name = xsr.getName().getLocalPart();
if (name.equals(startAtElement)) {
return xsr;
}
}
}
throw new IllegalArgumentException(String.format("Could not find element %s in response", startAtElement));
}
private static Object unmarshal(final XMLStreamReader xsr) throws JAXBException {
final Object entity = unmarshaller(jaxbContext).unmarshal(xsr);
return (entity instanceof JAXBElement ? ((JAXBElement) entity).getValue() : entity);
}
// Create unmarshaller every time
private static Unmarshaller unmarshaller(JAXBContext context) throws JAXBException {
return context.createUnmarshaller();
}
}
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "MyServiceResponse", propOrder = {
})
class MyServiceResponse {
@XmlElement(name = "Body")
protected MyServiceResponse.Body body;
/**
* Gets the value of the body property.
*
* @return
* possible object is
* {@link MyServiceResponse.Body }
*
*/
public MyServiceResponse.Body getBody() {
return body;
}
/**
* Sets the value of the body property.
*
* @param value
* allowed object is
* {@link MyServiceResponse.Body }
*
*/
public void setBody(MyServiceResponse.Body value) {
this.body = value;
}
/**
* <p>Java class for anonymous complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType>
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <all>
* <element name="Car" minOccurs="0">
* <complexType>
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <all>
* <element name="Brand" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* <element name="Color" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* </all>
* </restriction>
* </complexContent>
* </complexType>
* </element>
* </all>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
})
public static class Body {
@XmlElement(name = "Car")
protected MyServiceResponse.Body.Car car;
/**
* Gets the value of the car property.
*
* @return
* possible object is
* {@link MyServiceResponse.Body.Car }
*
*/
public MyServiceResponse.Body.Car getCar() {
return car;
}
/**
* Sets the value of the car property.
*
* @param value
* allowed object is
* {@link MyServiceResponse.Body.Car }
*
*/
public void setCar(MyServiceResponse.Body.Car value) {
this.car = value;
}
/**
* <p>Java class for anonymous complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType>
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <all>
* <element name="Brand" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* <element name="Color" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* </all>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
})
public static class Car {
@XmlElement(name = "Brand")
protected String brand;
@XmlElement(name = "Color")
protected String color;
/**
* Gets the value of the brand property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getBrand() {
return brand;
}
/**
* Sets the value of the brand property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setBrand(String value) {
this.brand = value;
}
/**
* Gets the value of the color property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getColor() {
return color;
}
/**
* Sets the value of the color property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setColor(String value) {
this.color = value;
}
}
}
}
@XmlRegistry
class ObjectFactory {
private final static QName _ServiceResponse_QNAME = new QName("http://www.example.com/type", "serviceResponse");
/**
* Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: com.example.type
*
*/
public ObjectFactory() {
}
/**
* Create an instance of {@link MyServiceResponse }
*
*/
public MyServiceResponse createMyServiceResponse() {
return new MyServiceResponse();
}
/**
* Create an instance of {@link MyServiceResponse.Body }
*
*/
public MyServiceResponse.Body createMyServiceResponseBody() {
return new MyServiceResponse.Body();
}
/**
* Create an instance of {@link MyServiceResponse.Body.Car }
*
*/
public MyServiceResponse.Body.Car createMyServiceResponseBodyCar() {
return new MyServiceResponse.Body.Car();
}
/**
* Create an instance of {@link JAXBElement }{@code <}{@link MyServiceResponse }{@code >}}
*
*/
@XmlElementDecl(namespace = "http://www.example.com/type", name = "serviceResponse")
public JAXBElement<MyServiceResponse> createServiceResponse(MyServiceResponse value) {
return new JAXBElement<MyServiceResponse>(_ServiceResponse_QNAME, MyServiceResponse.class, null, value);
}
}
我的XSD：
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://www.example.com/type"
targetNamespace="http://www.example.com/type" elementFormDefault="qualified" >
<xs:element name="serviceResponse" type="MyServiceResponse"/>
<xs:complexType name="MyServiceResponse">
<xs:all>
<xs:element name="Body" minOccurs="0">
<xs:complexType>
<xs:all>
<xs:element name="Car" minOccurs="0">
<xs:complexType>
<xs:all>
<xs:element name="Brand" type="xs:string" minOccurs="0"/>
<xs:element name="Color" type="xs:string" minOccurs="0"/>
</xs:all>
</xs:complexType>
</xs:element>
</xs:all>
</xs:complexType>
</xs:element>
</xs:all>
</xs:complexType>
</xs:schema>
已添加：
这是XmlStreamReader在启动解组时的XML。 JAXB解组ServiceResponse元素，Body，但不是Car。
<type:serviceResponse xmlns:type="http://www.example.com/type">
<Body xmlns="http://www.example.com/type">
<Car>
<Brand>Mitsubishi</Brand>
<Color>Red</Color>
</Car>
</Body>
</type:serviceResponse>
答案 0 :(得分：2)
@XmlType name＆＃39}属性为空，因为Car和Body是匿名类型。 （http://docs.oracle.com/javaee/5/api/javax/xml/bind/annotation/XmlType.html）
在全局命名空间中创建complexTypes，并将其用作type的{{1}}。 （小片段）
element或者像这样创建一个JAXB绑定：https://www.ibm.com/developerworks/library/ws-avoid-anonymous-types/#N100BB
转换XSD：
<xs:element name="Body" type="Body" minOccurs="0" />
<xs:complexType name="Body">