使用java dom设置命名空间和模式

Question

我的输出xml文档中有一个没有属性的根元素:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<root>
..
</root>

我需要它看起来像这样:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="my.xsd">
....
</root>

我无法弄清楚如何使用java DOM API正确执行此操作.

谢谢!

Answer 1

使用NS方法.在这种情况下,命名空间是http://www.w3.org/2001/XMLSchema-instance.

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = factory.newDocumentBuilder();
Document doc = docBuilder.newDocument();
Element root = doc.createElement("root");
root.setAttributeNS("http://www.w3.org/2001/XMLSchema-instance",
    "xsi:noNamespaceSchemaLocation", "my.xsd");
root.appendChild(doc.createElement("foo"));
doc.appendChild(root);
// see result
DOMImplementationLS dls = (DOMImplementationLS) doc.getImplementation();
System.out.println(dls.createLSSerializer().writeToString(doc));