在 JAXB 编组时删除命名空间前缀 [英] Remove namespace prefix while JAXB marshalling

问题描述

我有从模式创建的 JAXB 对象.在编组时，xml 元素使用 ns2 进行注释.对于这个问题，我已经尝试了网络上存在的所有选项，但没有一个有效.我无法修改我的架构或更改 package-info.java.请帮忙

I have JAXB objects created from a schema. While marshalling, the xml elements are getting annotated with ns2. I have tried all the options that exist over the net for this problem, but none of them works. I cannot modify my schema or change package-info.java. Please help

推荐答案

经过大量研究和修补，我终于设法解决了这个问题.请接受我的歉意，因为没有发布原始参考文献的链接 - 有很多，我没有做笔记 - 但这个一个肯定有用.

After much research and tinkering I have finally managed to achieve a solution to this problem. Please accept my apologies for not posting links to the original references - there are many and I wasn't taking notes - but this one was certainly useful.

我的解决方案使用过滤 XMLStreamWriter 应用空命名空间上下文.

My solution uses a filtering XMLStreamWriter which applies an empty namespace context.

public class NoNamesWriter extends DelegatingXMLStreamWriter {

  private static final NamespaceContext emptyNamespaceContext = new NamespaceContext() {

    @Override
    public String getNamespaceURI(String prefix) {
      return "";
    }

    @Override
    public String getPrefix(String namespaceURI) {
      return "";
    }

    @Override
    public Iterator getPrefixes(String namespaceURI) {
      return null;
    }

  };

  public static XMLStreamWriter filter(Writer writer) throws XMLStreamException {
    return new NoNamesWriter(XMLOutputFactory.newInstance().createXMLStreamWriter(writer));
  }

  public NoNamesWriter(XMLStreamWriter writer) {
    super(writer);
  }

  @Override
  public NamespaceContext getNamespaceContext() {
    return emptyNamespaceContext;
  }

}

你可以找到一个 DelegatingXMLStreamWriter 这里.

然后您可以使用以下命令过滤编组 xml:

You can then filter the marshalling xml with:

  // Filter the output to remove namespaces.
  m.marshal(it, NoNamesWriter.filter(writer));

我确信有更有效的机制，但我知道这个机制有效.

I am sure there are more efficient mechanisms but I know this one works.

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