Question

假定这一投入XML

<?xml version="1.0" encoding="UTF-16"?>
<test></test>

撰写这些法典:

StreamSource source = new StreamSource(new StringReader(/* the above XML*/));
StringWriter stringWriter = new StringWriter();
StreamResult streamResult = new StreamResult(stringWriter);
TransformerFactory.newInstance().newTransformer().transform(source, streamResult);
return stringWriter.getBuffer().toString();

Outputs:

<?xml version="1.0" encoding="UTF-8"?>
<test></test>

(UTF-16的公开编码改为“UTF-8)

I know I can explicitly ask for UTF-16 output

transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-16");

www.un.org/Depts/DGACM/index_spanish.htm 但问题是,如何使产出编码自动与投入相同?

Answer 1

为此,你不得不使用比“<代码”更尖端的东西。页: 1 例如,>>>>> getCharacterEncodingScheme(> 能够把产出随附起来的一套方法告诉你。

Answer 2

尝试:

// Create an XML Stream Reader
XMLStreamReader xmlSR = XMLInputFactory.newInstance()
        .createXMLStreamReader(new StringReader(/* the above XML*/));
// Wrap the XML Stream Reader in a StAXSource
StAXSource source = new StAXSource(xmlSR);
// Create a String Writer
StringWriter stringWriter = new StringWriter();
// Create a Stream Result
StreamResult streamResult = new StreamResult(stringWriter);
// Create a transformer
Transformer transformer = TransformerFactory.newInstance().newTransformer();
// Set STANDALONE based on the source stream
transformer.setOutputProperty(OutputKeys.STANDALONE,
        xmlSR.isStandalone() ? "yes" : "no");
// Set ENCODING based on the source stream
transformer.setOutputProperty(OutputKeys.ENCODING,
        xmlSR.getCharacterEncodingScheme());
// Set VERSION based on the source stream
transformer.setOutputProperty(OutputKeys.VERSION, xmlSR.getVersion());
// Transform the source stream to the out stream
transformer.transform(source, streamResult);
// Print the results
return stringWriter.getBuffer().toString();

Answer 3

You need to peek into the stream first. Section F of the XML specification gives you an idea how to auto-detect the encoding.

Answer 4

XSLT处理器实际上知道输入编码是什么(XML教区长告诉它,因为不需要知道)。您可以使用xsl:output确定产出编码,但这样做与投入一样,使你不得不首先发现输入编码,例如,在投放之前在源文档中沉积。

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