如何从生成的JAXB文件中删除命名空间？

Question

这是我的代码:

xsdFile:

<complexType name="Player">
    <sequence>
        <element name="Login" type="string"></element>
        <element name="Passwd" type="string"></element>
    </sequence>
</complexType>

<element name="Player" type="tns:Player"></element>

build.xml文件:

    <exec executable="${javahome}/bin/xjc"  >

        <arg value="-extension" />
        <arg value="-b" />
        <arg value="binding.xml" />
        <arg value="-d" />
        <arg value="${sources}" />
        <arg value="-p" />
        <arg value="metier" />
        <arg value="Player.xsd" />

    </exec>
</target>

binding.xml:

<jxb:bindings 
xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
jxb:extensionBindingPrefixes="xjc" elementFormDefault="qualified" attributeFormDefault="unqualified"
version="2.1">

<jxb:globalBindings>
    <xjc:simple />
    <xjc:serializable/>
</jxb:globalBindings>

并且finnaly:

JAXBContext context = JAXBContext.newInstance(Player.class,ObjectFactory.class); Unmarshaller decodeur = context.createUnmarshaller();

我添加"xjc:simple"以获得@XMLRootElement,但引发了一个异常:javax.xml.bind.UnmarshalException:unexpected element(uri:"http://www.example.org/Player"

它没有正常工作,因为我得到了这个:@XmlRootElement(name ="Player",namespace ="http://www.example.org/Player")

而不只是:@XmlRootElement(name ="Player")

我怎样才能删除这个"命名空间"？

谢谢

Answer 1

如果您的XML模式指示相应的XML文档应该是名称空间限定的,那么JAXB将生成具有预期名称空间限定的Java模型.下面我将描述一种方法,您可以利用StAX解析器来欺骗JAXB,使其认为它正在解析命名空间限定文档:

播放机

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name="Player", namespace="http://www.example.org/Player")
public class Player {

    private String login;
    private String passwd;

    @XmlElement(name="Login", namespace="http://www.example.org/Player")
    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    @XmlElement(name="Passwd", namespace="http://www.example.org/Player")
    public String getPasswd() {
        return passwd;
    }

    public void setPasswd(String passwd) {
        this.passwd = passwd;
    }

}

NamespaceDelegate

我们将创建一个实现StreamReaderDelegate.该委托将报告所有元素事件的名称空间"http://www.example.org/Player".注意:此技巧假定您的所有元素都使用相同的名称空间URI进行限定.

import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.util.StreamReaderDelegate;

public class NamespaceDelegate extends StreamReaderDelegate {

    private static String NAMESPACE = "http://www.example.org/Player";

    public NamespaceDelegate(XMLStreamReader xsr) {
        super(xsr);
    }

    @Override
    public String getNamespaceURI() {
        return NAMESPACE;
    }

}

演示

import java.io.FileInputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.util.StreamReaderDelegate;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Player.class);

        FileInputStream xmlStream = new FileInputStream("input.xml");
        XMLInputFactory xif = XMLInputFactory.newFactory();
        XMLStreamReader xsr = xif.createXMLStreamReader(xmlStream);
        StreamReaderDelegate srd = new NamespaceDelegate(xsr);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        Player player = (Player) unmarshaller.unmarshal(srd);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(player, System.out);
    }

}

input.xml中

<?xml version="1.0" encoding="UTF-8"?>
<Player>
    <Login>FOO</Login>
    <Passwd>BAR</Passwd>
</Player>

Answer 2

我只需删除“ObjectFactory.class”即可。新代码：

JAXBContext context = JAXBContext.newInstance(Player.class);
Unmarshaller decodeur = context.createUnmarshaller();