我需要在我的xml中设置元素的前缀。我需要以下面的格式打印xml:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<cars xmlns:dcterms="http://purl.org/dc/terms/" xmlns:msxsl="urn:schemas-microsoft-com:xslt">
<supercars company="Ferrari">
<dcterms:carname type="formula one">Ferrari 101</dcterms:carname>
<msxsl:carname type="sports">Ferrari 202</msxsl:carname>
</supercars>
</cars>
但是,我无法在XML中添加前缀。我得到的就是这个。
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<cars xmlns:dcterms="http://purl.org/dc/terms/" xmlns:msxsl="urn:schemas-microsoft-com:xslt">
<supercars company="Ferrari">
<carname type="formula one">Ferrari 101</carname>
<carname type="sports">Ferrari 202</carname>
</supercars>
</cars>
以下是我的Java代码:
public static void main(String args[]) {
try {
DocumentBuilderFactory dbFactory =
DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder =
dbFactory.newDocumentBuilder();
Document doc = dBuilder.newDocument();
// root element
Element rootElement = doc.createElement("cars");
rootElement.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:dcterms", "http://purl.org/dc/terms/");
rootElement.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:msxsl", "urn:schemas-microsoft-com:xslt");
doc.appendChild(rootElement);
// supercars element
Element supercar = doc.createElement("supercars");
rootElement.appendChild(supercar);
// setting attribute to element
Attr attr = doc.createAttribute("company");
attr.setValue("Ferrari");
// supercar.setAttributeNodeNS(attr);
supercar.setAttributeNode(attr);
// carname element
Element carname = doc.createElement("carname");
Attr attrType = doc.createAttribute("type");
attrType.setValue("formula one");
carname.setAttributeNode(attrType);
carname.appendChild(
doc.createTextNode("Ferrari 101"));
supercar.appendChild(carname);
Element carname1 = doc.createElement("carname");
Attr attrType1 = doc.createAttribute("type");
attrType1.setValue("sports");
carname1.setAttributeNode(attrType1);
carname1.appendChild(
doc.createTextNode("Ferrari 202"));
supercar.appendChild(carname1);
// write the content into xml file
TransformerFactory transformerFactory =
TransformerFactory.newInstance();
Transformer transformer =
transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
DOMSource source = new DOMSource(doc);
StreamResult result =
new StreamResult(new File("cars.xml"));
transformer.transform(source, result);
// Output to console for testing
StreamResult consoleResult =
new StreamResult(System.out);
transformer.transform(source, consoleResult);
} catch (Exception e) {
e.printStackTrace();
}
}
}
我查看了这个链接Adding namespace prefix XML String using XML DOM。但是,这只谈到了SAX做事的方式。我需要在DOM中执行此操作。
我尝试了setPrefix方法,它给我带来了NAMESPACE_ERR
答案 0 :(得分:3)
首先,如果您想使用支持命名空间的DOM,请确保设置dbFactory.setNamespaceAware(true);
。
然后使用createElementNS
,例如Element carname = doc.createElementNS("http://purl.org/dc/terms/", "dcterms:carname");
,用于在命名空间中创建元素。对另一个命名空间中的元素使用相同的方法。