问题描述
假设此输入XML
<?xml version="1.0" encoding="UTF-16"?>
<test></test>
编写以下代码：
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();
输出此XML：
<?xml version="1.0" encoding="UTF-8"?>
<test></test>
（声明的UTF- 16 编码转换为默认UTF - 8 ）
(the declared encoding of UTF-16 is converted to the default UTF-8)
我知道我可以明确要求输入UTF-16。
I know I can explicitly ask for UTF-16 output
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-16");
但问题是，如何自动进行输出编码 >与输入相同
But the question is, how to make the output encoding automatically be the same as the input?
推荐答案
要做到这一点，比 StreamSource 。例如，需要一个 XMLStreamReader ，其中包含方法，告诉您输入文档使用的编码 - 您可以设置为输出enocding。
To do this, you'll have to use something more sophisticated than a StreamSource. For example, a StAXSource takes an XMLStreamReader, which has the getCharacterEncodingScheme() method that tells you which encoding the input document used - you can the set that as output enocding.
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