JDom

package javawebservice;
import java.io.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import org.jdom.*;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;
public class JDOMDemo
{
public static Document readDocument()
{
try
{
//新建SAXBuilder
SAXBuilder builder = new SAXBuilder();
//得到模板XML文件
Document anotherDocument =
builder.build(new File("xml/sample.xml"));
return anotherDocument;
}
catch (JDOMException e)
{
e.printStackTrace();
}
catch (NullPointerException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return null;
}
public static Document createDocument()
{
//建立根节点
Element carElement = new Element("car");
//建立文档
Document myDocument = new Document(carElement);
//建立注释节点
carElement.addContent(
new Comment("Description of a car"));
Element make = new Element("make");
make.addContent("Toyota");
carElement.addContent(make);
//建立更多的元素节点
carElement.addContent(
new Element("model").addContent("Celica"));
carElement.addContent(
new Element("year").addContent("1997"));
carElement.addContent(
new Element("color").addContent("green"));
return myDocument;
}
public static void accessChildElement(Document myDocument)
{
//根节点的建立
Element carElement = myDocument.getRootElement();
//与子节点进行数据通讯
Element yearElement = carElement.getChild("year");
if (yearElement != null)
{
System.out.println(
"Here is the element we found: "
+ yearElement.getName()
+ ".  Its content: "
+ yearElement.getText()
+ "\n");
}
else
{
System.out.println(
"Something is wrong."+
"  We did not find a year Element");
}
}
public static void removeChildElement(Document myDocument)
{
System.out.println(
"About to remove the year element.\n"+
"The current document:");
outputDocument(myDocument);
Element carElement = myDocument.getRootElement();
//删除节点
boolean removed = carElement.removeChild("year");
if (removed)
{
System.out.println(
"Here is the modified document without year:");
outputDocument(myDocument);
}
else
{
System.out.println(
"Something happened."+
"We were unable to remove the year element.");
}
}
public static void outputDocument(Document myDocument)
{
try
{
XMLOutputter outputter = new XMLOutputter("  ", true);
outputter.output(myDocument, System.out);
}
catch (java.io.IOException e)
{
e.printStackTrace();
}
}
public static void outputDocumentToFile(Document myDocument)
{
try
{
XMLOutputter outputter = new XMLOutputter("  ", true);
//建立一个新的XML文件
FileWriter writer = new FileWriter("xml/myFile.xml");
outputter.output(myDocument, writer);
writer.close();
}
catch (java.io.IOException e)
{
e.printStackTrace();
}
}
public static void executeXSL(Document myDocument)
{
try
{
TransformerFactory tFactory =
TransformerFactory.newInstance();
org.jdom.output.DOMOutputter outputter =
new org.jdom.output.DOMOutputter();
org.w3c.dom.Document domDocument =
outputter.output(myDocument);
javax.xml.transform.Source xmlSource =
new javax.xml.transform.dom.DOMSource(domDocument);
StreamSource xsltSource =
new StreamSource(
new FileInputStream("xml/car.xsl"));
StreamResult xmlResult = new StreamResult(System.out);
Transformer transformer =
tFactory.newTransformer(xsltSource);

transformer.transform(xmlSource, xmlResult);
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (TransformerConfigurationException e)
{
e.printStackTrace();
}
catch (TransformerException e)
{
e.printStackTrace();
}
catch (org.jdom.JDOMException e)
{
e.printStackTrace();
}
}
public static void main(String argv[])
{
if (argv.length == 1)
{
String command = argv[0];
if (command.equals("create"))
outputDocument(createDocument());
else if (command.equals("access"))
accessChildElement(createDocument());
else if (command.equals("remove"))
removeChildElement(createDocument());
else if (command.equals("output"))
outputDocument(createDocument());
else if (command.equals("file"))
outputDocumentToFile(createDocument());
else if (command.equals("read"))
outputDocument(readDocument());
else if (command.equals("xsl"))
executeXSL(createDocument());
else
{
System.out.println(
command + " is not a valid option.");
printUsage();
}
}
else
{
printUsage();
}
}
public static void printUsage()
{
System.out.println(
"Usage: Article [option] \n where option is one of the following:");
System.out.println(
"  create - create a document as shown in Listing 2");
System.out.println(
"  access - access a child element as shown in Listing 3");
System.out.println(
"  remove - remove a child element as shown in Listing 4");
System.out.println(
"  output - output a document to the console as shown in Listing 5");
System.out.println(
"  file   - output a document to xml/myFile.xml as shown in Listing 6");
System.out.println(
"  read   - parse a document from xml/sample.xml as shown in Listing 7");
System.out.println(
"  xsl    - transform a document as shown in Listing 9");
}
}