JAXB编组问题 - 可能与命名空间有关 [英] JAXB marshalling problem - probably namespace related

问题描述

给定初始XML（BPEL）文件：

Given the intitial XML (BPEL) file:

 <?xml version="1.0" encoding="UTF-8"?>
<process
    name="TestSVG2"
    xmlns="http://www.example.org"
    targetNamespace="http://www.example.org"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">

    <sequence>
        <receive name="Receive1" createInstance="yes"/>
        <assign name="Assign1"/>
        <invoke name="Invoke1"/>
        <assign name="Assign2"/>
        <reply name="Reply1"/>
    </sequence>
</process>

我编写了一个使用JAXB的函数来修改XML中的一些数据。
该函数如下：

I have written a function that uses JAXB in order to modify some data inside the XML. The function is as follows:

public void editAction(String name, String newName) {
    Process proc;
    StringWriter sw = new StringWriter();
    JAXBContext jaxbContext = null;
    Unmarshaller unMarsh = null;
    Object obj = new Object();
    try {
        /* XML TO JAVA OBJECT */
        jaxbContext = JAXBContext.newInstance("org.example");
        unMarsh = jaxbContext.createUnmarshaller();
        obj = unMarsh.unmarshal(new File(path + "/resources/" + BPELFilename));
        proc = (Process) obj;
        Process.Sequence sequence = proc.getSequence();

        /* Determine which element needs to be edited */
       /* Do some editing , code wasn't included */

        /* OBJ Back to XML */
        Marshaller marsh = jaxbContext.createMarshaller();
        marsh.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
        //marsh.setProperty("com.sun.xml.bind.namespacePrefixMapper", new CustomPrefixMapper());
        marsh.marshal(obj, new File(path + "/resources/" + BPELFilename));

    } catch (JAXBException e) {
        /* Be afraid */
        e.printStackTrace();
    }
}

与JAXB相关的编辑后得到的XML是：

The resulting XML after the JAXB-related editing is:

<!-- After -->
 <?xml version="1.0" encoding="UTF-8"?>
<ns0:process 
    name="TestSVG2" 
    targetNamespace="http://www.example.org" 
    xmlns:ns0="http://www.example.org">

    <ns0:sequence>
        <ns0:receive name="newName" createInstance="yes"/>
        <ns0:assign name="Assign1"/>
        <ns0:assign name="Assign2"/>
        <ns0:invoke name="Invoke1"/>
        <ns0:reply name="Reply1"/>
    </ns0:sequence>
</ns0:process>

不幸的是，生成的XML不符合我们的应用程序，因为我们的XML解析器在解析时崩溃了新的XML。

Unfortunately the resulting XML, is not compliant to our application, as our XML parser crashes when is parsing the new XML.

所以：

• 如何删除命名空间 ns0 ，在生成的XML中？


• 如何保留初始XML文件中的相同标头（ xml：xsd 缺少）？

• How do I remove the namespace ns0, in the resulting XML ?
• How to I preserve the same header from the initial XML File (the xml:xsd is missing)?

谢谢！

推荐答案

如果你使用 MOXy JAXB 实施你可以执行以下操作：

If you use the MOXy JAXB implementation you can do the following:

您的域对象：

package example;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Process {

}

使用该包注释@XmlSchema

Use that package annotation @XmlSchema

@javax.xml.bind.annotation.XmlSchema( 
    namespace = "http://www.example.org", 
    xmlns = {
        @javax.xml.bind.annotation.XmlNs(prefix = "xsd", namespaceURI = "http://www.w3.org/2001/XMLSchema"),
    },
    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED) 
package example;

要使用MOXy JAXB，您需要在模型类中添加一个jaxb.properties文件，其中包含以下内容：条目：

To use MOXy JAXB you need to add a jaxb.properties file in with your model classes with the following entry:

javax.xml.bind.context.factory=org.eclipse.persistence.jaxb.JAXBContextFactory

这将生成XML：

<?xml version="1.0" encoding="UTF-8"?>
<process xmlns="http://www.example.org" xmlns:xsd="http://www.w3.org/2001/XMLSchema"/>

这篇关于JAXB编组问题 - 可能与命名空间有关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！