| Java XML教程(一)__教程 |
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| 日期：2007-5-20 1:28:04 人气：234 [大 中 小] |
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/**
* domOne.java
* Illustrates how to go through a DOM tree.
*/
public class domOne
{
public void parseAndPrint(String uri)
{
Document doc = null;
try
{
DOMParser parser = new DOMParser();
parser.parse(uri);
doc = parser.getDocument();
}
catch (Exception e)
{
System.err.println("Sorry, an error occurred: " + e);
}
// We`ve parsed the document now, so let`s print it.
if (doc != null)
printDOMTree(doc);
}
/** Prints the specified node, then prints all of its children. */
public void printDOMTree(Node node)
{
int type = node.getNodeType();
switch (type)
{
// print the document element
case Node.DOCUMENT_NODE:
{
System.out.println("");
printDOMTree(((Document)node).getDocumentElement());
break;
}
// print element with attributes
case Node.ELEMENT_NODE:
{
System.out.print("<");
System.out.print(node.getNodeName());
NamedNodeMap attrs = node.getAttributes();
for (int i = 0; i < attrs.getLength(); i++)
{
Node attr = attrs.item(i);
System.out.print(" " + attr.getNodeName() +
"="" + attr.getNodeValue() +
""");
}
System.out.println(">");
NodeList children = node.getChildNodes();
if (children != null)
{
int len = children.getLength();
for (int i = 0; i < len; i++)
printDOMTree(children.item(i));
}
break;
}
// handle entity reference nodes
case Node.ENTITY_REFERENCE_NODE:
{
System.out.print("&");
System.out.print(node.getNodeName());
System.out.print(";");
break;
}
// print cdata sections
case Node.CDATA_SECTION_NODE:
{
System.out.print("System.out.print(node.getNodeValue());
System.out.print("]]>");
break;
}
// print text
case Node.TEXT_NODE:
{
System.out.print(node.getNodeValue());
break;
}
// print processing instruction
case Node.PROCESSING_INSTRUCTION_NODE:
{
System.out.print("System.out.print(node.getNodeName());
String data = node.getNodeValue();
{
System.out.print(" ");
System.out.print(data);
}
System.out.print("?>");
break;
}
}
if (type == Node.ELEMENT_NODE)
{
System.out.println();
System.out.print("System.out.print(node.getNodeName());
System.out.print(`>`);
}
}
/** Main program entry point. */
public static void main(String argv[])
{
if (argv.length == 0)
{
System.out.println("Usage: java domOne uri");
System.out.println(" where uri is the URI of the XML document you want to print.");
System.out.println(" Sample: java domOne sonnet.xml");
System.exit(1);
}
domOne d1 = new domOne();
d1.parseAndPrint(argv[0]);
}
}
domCounter.java
这段代码解析一个 XML 文档，然后遍历 DOM 树来采集有关该文档的数据。当数据采集后将其输出到标准输出。 |
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| 出处：本站原创 作者：佚名 |
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