如何使用DOM在XML文档中添加doctype。

Question

如何使用DOM在XML文档中添加doctype。

6

我已经使用Java中的DOM创建了一个XML文档。我无法添加doctype。我想要以下doctype。

<!DOCTYPE IndInfo PUBLIC "EDAFileSomething" "EDAFileSomething_2_0.dtd">

以下是文件创建代码。

DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.newDocument();

这里是Transformer对象代码。

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = null;
try {
    transformer = transformerFactory.newTransformer();
} catch (TransformerConfigurationException ex) {
    Logger.getLogger(Reader.class.getName()).log(Level.SEVERE, null, ex);
}
DOMSource source = new DOMSource(doc);
try {

    StreamResult result = new StreamResult(System.out);
    transformer.transform(source, result);
} catch (TransformerException ex) {
    Logger.getLogger(Reader.class.getName()).log(Level.SEVERE, null, ex);
}

System.out.println("File saved!");

- wali

2个回答

1

如果您通过在DocumentBuilder上调用getDOMImplementation()方法来获取DOMImplementation实例，则可以使用createDocument方法创建具有指定文档类型的新Document。

它还具有一个createDocumentType方法，用于创建DocumentType对象

有关更多信息，请参见http://docs.oracle.com/javase/1.5.0/docs/api/org/w3c/dom/DOMImplementation.html和http://docs.oracle.com/javase/1.5.0/docs/api/javax/xml/parsers/DocumentBuilder.html

- Magnus

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- Adam · Accepted Answer

您可以使用DOM构建doctype，并将doctype设置为输出属性。

TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
DOMImplementation domImpl = document.getImplementation();
DocumentType doctype = domImpl.createDocumentType("doctype",
    "-//Oberon//YOUR PUBLIC DOCTYPE//EN",
    "YOURDTD.dtd");
transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, doctype.getPublicId());
transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, doctype.getSystemId());
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(new File(database));
transformer.transform(source, result);