在编组jaxb时从根元素中删除xmlns属性 [英] remove xmlns attribute from the root element while marshalling jaxb

问题描述

这可能与 JAXB Marshaller有关 - 如何做我压制xmlns命名空间属性？

但我的问题有点不同。
我做常规java编组，我的xsd没有名称空间。生成的xml也没有名称空间，除了根元素。

But my problem is a little different. I do the regular java marshalling and my xsd has no namespaces.The generated xml is without namespaces as well, except for the root element.

<?xml version="1.0" encoding="UTF-8"?><rootElement xmlns:ns2="unwanted namespace">

不受欢迎的命名空间来自另一个模式同一个项目，我不知道为什么会在这个阶段被选中。

The unwanted namespace is from another schema from the same project and I am not sure why that is being picked up at this stage.

我的rootElement.java由jaxb2-maven-plugin生成如下：

My rootElement.java generated by jaxb2-maven-plugin looks like :

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"feed"
})
@XmlRootElement(name = "rootElement", namespace = "")
public class RootElement{
....
}

此时我只想摆脱 xmlns：ns2 =unwanted namespace来自生成的xml的属性，我正在努力解决它。

At this point all I want is to get rid of the xmlns:ns2="unwanted namespace" attribute from the generated xml and I am struggling with it.

我查看了我的package-info.java，看起来像：

I looked at my package-info.java and it looks like:

@javax.xml.bind.annotation.XmlSchema(namespace = "unwanted namespace", elementFormDefault =   javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.mypackage;

我尝试添加 -npa 但它出于某种原因，不能使用 jaxb2-maven-plugin 。我尝试了 NamespaceMapper ，但这适用于更改前缀。我无法完全删除命名空间。这让我困扰了一天。

I tried adding he -npa but it wont work on jaxb2-maven-plugin for some reason. I tried the NamespaceMapper but that works for changing prefixes. I could not get it to remove the namespace altogether. This is bothering me for a day now.

推荐答案

我目前有类似的要求。对我有用的唯一解决方案是为XMLStreamWriter实现一个包装器。

I have similar requirements at the moment. The only solution that worked for me is implementing a wrapper for XMLStreamWriter.

请在此处查看我的回答。我还描述了我尝试过的其他解决方案。

Please, take a look at my answer here. I've also described there other solutions I tried out.

使用上面链接中的代码进行序列化如下所示：

Serialization using code from the link above looks like this:

XMLOutputFactory factory = XMLOutputFactory.newFactory();

StringWriter writer = new StringWriter(XML_BUFFER_INITIAL_SIZE);
XMLStreamWriter xmlWriter = null;

try {
  xmlWriter = factory.createXMLStreamWriter(writer);
  JAXBContext context = JAXBContext.newInstance(MyJAXBGeneratedClass.class);
  Marshaller marshaller = context.createMarshaller();
  marshaller.marshal(reportContainer, new NamespaceStrippingXMLStreamWriter(xmlWriter));
  xmlWriter.flush();
}
finally {
  if (xmlWriter != null)
    xmlWriter.close();
}

return writer.toString();

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