Java、XML DocumentBuilder - 解析时设置编码
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Java, XML DocumentBuilder - setting the encoding when parsing
提问by Ralph D
I'm trying to save a tree (extends JTree) which holds an XMLdocument to a DOM Objecthaving changed it's structure.
我正在尝试保存一棵树（扩展JTree），该树将XML文档保存为DOM Object已更改其结构的文件。
I have created a new document object, traversed the tree to retrieve the contents successfully (including the original encoding of the XMLdocument), and now have a ByteArrayInputStreamwhich has the tree contents (XMLdocument) with the correct encoding.
我创建了一个新的文档对象，遍历树以成功检索内容（包括XML文档的原始编码），现在有一个ByteArrayInputStream具有XML正确编码的树内容（文档）。
The problem is when I parse the ByteArrayInputStreamthe encoding is changed to UTF-8(in the XMLdocument) automatically.
问题是当我解析ByteArrayInputStream编码时自动更改为UTF-8（在XML文档中）。
Is there a way to prevent this and use the correct encoding as provided in the ByteArrayInputStream.
有没有办法防止这种情况发生并使用ByteArrayInputStream.
It's also worth adding that I have already used thetransformer.setOutputProperty(OutputKeys.ENCODING, encoding)method to retrieve the right encoding.
还值得补充的是，我已经使用该transformer.setOutputProperty(OutputKeys.ENCODING, encoding)方法来检索正确的编码。
Any help would be appreciated.
任何帮助，将不胜感激。
回答by Ralph D
I solved it, given alot of trial and errors.
我解决了它，经过大量的试验和错误。
I was using
我正在使用
OutputFormat format = new OutputFormat(document);
but changed it to
但将其更改为
OutputFormat format = new OutputFormat(d, encoding, true);
and this solved my problem.
这解决了我的问题。
encodingis what I set it to betruerefers to whether or not indent is set.
encoding是我设置它是true指是否设置了缩进。
Note to self - read more carefully - I had looked at the javadoc hours ago - if only I'd have read more carefully.
自我注意-更仔细地阅读-我在几个小时前看过javadoc-如果我能更仔细地阅读就好了。
回答by Andrey
// Read XML
String xml = "xml"
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xml)));
// Append formatting
OutputFormat format = new OutputFormat(document);
if (document.getXmlEncoding() != null) {
format.setEncoding(document.getXmlEncoding());
}
format.setLineWidth(100);
format.setIndenting(true);
format.setIndent(5);
Writer out = new StringWriter();
XMLSerializer serializer = new XMLSerializer(out, format);
serializer.serialize(document);
String result = out.toString();
回答by Cyril N.
Here's an updated answer since OutputFormat is deprecated :
这是一个更新的答案，因为 OutputFormat 已被弃用：
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(document), new StreamResult(writer));
String output = writer.getBuffer().toString().replaceAll("\n|\r", "");
The second part will return the XML Document as String
第二部分将 XML 文档作为字符串返回
回答by Matt
This worked for me and is very simple. No need for a transformer or output formatter:
这对我有用，而且非常简单。不需要转换器或输出格式化程序：
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(inputStream);
is.setEncoding("ISO-8859-1"); // set your encoding here
Document document = builder.parse(is);
