XMLStreamWriter 写入包含冒号的标记
当我在标签名称中使用冒号(如下例所示)时,它最终会出错(没有冒号的标签没有问题)。
package test;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
public class SomeClass{
public StringWriter test() throws XMLStreamException, TransformerConfigurationException, TransformerException {
StringWriter stringOut = new StringWriter();
XMLStreamWriter xmlWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(stringOut);
xmlWriter.writeStartDocument("UTF-8", "1.0");
xmlWriter.writeStartElement("SomeWordHere");
{
xmlWriter.writeStartElement("SomeName:enable");//<--- notice the colon
xmlWriter.writeCharacters("true");
xmlWriter.writeEndElement();
}
xmlWriter.writeEndElement();
xmlWriter.writeEndDocument();
xmlWriter.flush();
xmlWriter.close();
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.STANDALONE, "no");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
StringWriter formattedStringWriter = new StringWriter();
transformer.transform(new StreamSource(new StringReader(stringOut.toString())), new StreamResult(formattedStringWriter));
return formattedStringWriter;
}
}
如何编写仍然包含冒号并且不会出错的标签?
我正在尝试模拟 LEGO Stud.io 软件生成的 XML 输出 (Collada DAE),其中有如下部分包含带冒号的标签名称。
<library_materials>
<material id="material_id_7" name="SOLID-BLUE">
<instance_effect url="#effect_id_7-fx" />
<extra>
<technique profile="eyesight">
<ScratchBump:enable> true </ScratchBump:enable>
<MinScratchStrength:value> 0 </MinScratchStrength:value>
<MaxScratchStrength:value> 0.2 </MaxScratchStrength:value>
<BigScratch:enable> true </BigScratch:enable>
<SmallScratch:enable> true </SmallScratch:enable>
</technique>
</extra>
</material>
</library_materials>
When I use colon in the tag name like in the example below, it ends up in error (there is no problem with tags without the colon).
package test;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
public class SomeClass{
public StringWriter test() throws XMLStreamException, TransformerConfigurationException, TransformerException {
StringWriter stringOut = new StringWriter();
XMLStreamWriter xmlWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(stringOut);
xmlWriter.writeStartDocument("UTF-8", "1.0");
xmlWriter.writeStartElement("SomeWordHere");
{
xmlWriter.writeStartElement("SomeName:enable");//<--- notice the colon
xmlWriter.writeCharacters("true");
xmlWriter.writeEndElement();
}
xmlWriter.writeEndElement();
xmlWriter.writeEndDocument();
xmlWriter.flush();
xmlWriter.close();
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.STANDALONE, "no");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
StringWriter formattedStringWriter = new StringWriter();
transformer.transform(new StreamSource(new StringReader(stringOut.toString())), new StreamResult(formattedStringWriter));
return formattedStringWriter;
}
}
How to write the tag that would still conain the colon and would not end up in error?
I am trying to emulate the XML output (Collada DAE) produced by LEGO Stud.io software, there are sections like the one below containing tag names with colons.
<library_materials>
<material id="material_id_7" name="SOLID-BLUE">
<instance_effect url="#effect_id_7-fx" />
<extra>
<technique profile="eyesight">
<ScratchBump:enable> true </ScratchBump:enable>
<MinScratchStrength:value> 0 </MinScratchStrength:value>
<MaxScratchStrength:value> 0.2 </MaxScratchStrength:value>
<BigScratch:enable> true </BigScratch:enable>
<SmallScratch:enable> true </SmallScratch:enable>
</technique>
</extra>
</material>
</library_materials>
如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱,如果其他用户或者作者回复了您的评论,将不能在第一时间通知您!
发布评论
评论(1)
冒号用于命名空间,并且根据“XML 中的命名空间”规范,它不能在实体名称中使用。
规范指出:
您可以使用一个技巧,将“SomeName”声明为命名空间,正如这个问题中所建议的: xml 架构验证错误“前缀未绑定”。
另一方面,“可扩展标记语言”规范指出:
如果您更改解析器,您可以获得您想要的:
参考:https://www .w3.org/TR/REC-xml-names/
Colon is used for namespaces and per "Namespaces in XML" specification, it cannot be used in entity names.
The specification states:
You can use a trick that is to declare "SomeName" as a namespace as it is suggested in this question: xml schema validation error "prefix is not bound".
On the other hand, "Extensible Markup Language" Specification state that:
If you change the parser you can get what you want:
Reference: https://www.w3.org/TR/REC-xml-names/