/usr/share/doc/libdom4j-java-doc/guide.html is in libdom4j-java-doc 1.6.1+dfsg.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><title>dom4j - Quick Start Guide</title><style type="text/css" media="all">
@import url("./style/maven-base.css");
@import url("./style/maven-theme.css");</style><link rel="stylesheet" href="./style/print.css" type="text/css" media="print"></link><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"></meta><meta name="author" content="James Strachan"></meta><meta name="email" content="jstrachan@apache.org"></meta></head><body class="composite"><div id="banner"><a href="http://sourceforge.net/projects/dom4j" id="organizationLogo"><img alt="MetaStuff Ltd." src="http://sourceforge.net/sflogo.php?group_id=16035"></img></a><a href="http://dom4j.org" id="projectLogo"><img alt="dom4j" src="./images/logo.gif"></img></a><div class="clear"><hr></hr></div></div><div id="breadcrumbs"><div class="xleft">
Last published: 16 May 2005
<span class="separator">|</span>
Doc for 1.6.1
</div><div class="xright">
<a href="http://www.w3.org/TR/xpath" class="externalLink" title="External Link">XPath Spec</a>
<span class="separator">|</span>
<a href="http://jaxen.codehaus.org/" class="externalLink" title="External Link">Jaxen</a>
<span class="separator">|</span>
<a href="http://sourceforge.net/projects/dom4j/" class="externalLink" title="External Link">dom4j@SourceForge</a>
</div><div class="clear"><hr></hr></div></div><div id="leftColumn"><div id="navcolumn"><div id="menudom4j"><h5>dom4j</h5><ul><li class="none"><a href="index.html">Home</a></li><li class="none"><a href="faq.html">FAQ</a></li><li class="none"><strong><a href="guide.html">Quick start</a></strong></li><li class="none"><a href="cookbook.html" class="newWindow" title="New Window" target="_blank">Cookbook</a></li><li class="none"><a href="compare.html">Comparison</a></li><li class="none"><a href="goals.html">Goals</a></li><li class="none"><a href="changes-report.html">Changes</a></li><li class="none"><a href="download.html">Download</a></li><li class="none"><a href="license.html">License</a></li><li class="none"><a href="apidocs/index.html" class="newWindow" title="New Window" target="_blank">Javadoc (1.6.1)</a></li><li class="none"><a href="http://www.dom4j.org/dom4j-1.5.2/apidocs/index.html" class="newWindow" title="New Window" target="_blank">Javadoc (1.5.2)</a></li><li class="none"><a href="http://www.dom4j.org/dom4j-1.4/apidocs/index.html" class="newWindow" title="New Window" target="_blank">Javadoc (1.4)</a></li></ul></div><div id="menuProject_Documentation"><h5>Project Documentation</h5><ul><li class="none"><a href="index.html">About dom4j</a></li><li class="collapsed"><a href="project-info.html">Project Info</a></li><li class="collapsed"><a href="maven-reports.html">Project Reports</a></li><li class="none"><a href="http://maven.apache.org/development-process.html" class="externalLink" title="External Link">Development Process</a></li></ul></div><div id="legend"><h5>Legend</h5><ul><li class="externalLink">External Link</li><li class="newWindow">Opens in a new window</li></ul></div><a href="http://www.cenqua.com/clover" title="Code Coverage by Clover" id="poweredByExternal"><img alt="Code Coverage by Clover" src="http://www.cenqua.com/images/clovered1.gif"></img></a><a href="http://www.sourceforge.net" title="Hosted by SourceForge" id="poweredByExternal"><img alt="Hosted by SourceForge" src="http://sourceforge.net/sflogo.php?group_id=16035&amp;type=1"></img></a><a href="http://maven.apache.org/" title="Built by Maven" id="poweredBy"><img alt="Built by Maven" src="./images/logos/maven-button-1.png"></img></a></div></div><div id="bodyColumn"><div class="contentBox"><div class="section"><a name="Parsing_XML"></a><h2>Parsing XML</h2><p>One of the first things you'll probably want to do is to parse an
XML document of some kind. This is easy to do in <i>dom4j</i>.
The following code demonstrates how to this.
</p><pre>
import java.net.URL;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
public class Foo {
public Document parse(URL url) throws DocumentException {
SAXReader reader = new SAXReader();
Document document = reader.read(url);
return document;
}
}
</pre></div><div class="section"><a name="Using_Iterators"></a><h2>Using Iterators</h2><p>A document can be navigated using a variety of methods that return
standard Java Iterators. For example
</p><pre>
public void bar(Document document) throws DocumentException {
Element root = document.getRootElement();
// iterate through child elements of root
for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
Element element = (Element) i.next();
// do something
}
// iterate through child elements of root with element name "foo"
for ( Iterator i = root.elementIterator( "foo" ); i.hasNext(); ) {
Element foo = (Element) i.next();
// do something
}
// iterate through attributes of root
for ( Iterator i = root.attributeIterator(); i.hasNext(); ) {
Attribute attribute = (Attribute) i.next();
// do something
}
}
</pre></div><div class="section"><a name="Powerful_Navigation_with_XPath"></a><h2>Powerful Navigation with XPath</h2><p>In <i>dom4j</i> XPath expressions can be evaluated on the Document
or on any Node in the tree (such as Attribute, Element or
ProcessingInstruction).
This allows complex navigation throughout the document with a single
line of code. For example.
</p><pre>
public void bar(Document document) {
List list = document.selectNodes( "//foo/bar" );
Node node = document.selectSingleNode( "//foo/bar/author" );
String name = node.valueOf( "@name" );
}
</pre><p>For example if you wish to find all the hypertext links in an XHTML document
the following code would do the trick.
</p><pre>
public void findLinks(Document document) throws DocumentException {
List list = document.selectNodes( "//a/@href" );
for (Iterator iter = list.iterator(); iter.hasNext(); ) {
Attribute attribute = (Attribute) iter.next();
String url = attribute.getValue();
}
}
</pre><p>If you need any help learning the XPath language we highly recommend
the <a href="http://www.zvon.org/xxl/XPathTutorial/General/examples.html" class="externalLink" title="External Link">Zvon tutorial</a>
which allows you to learn by example.
</p></div><div class="section"><a name="Fast_Looping"></a><h2>Fast Looping</h2><p>If you ever have to walk a large XML document tree
then for performance we recommend you use the fast
looping method which avoids the cost of creating
an Iterator object for each loop. For example
</p><pre>
public void treeWalk(Document document) {
treeWalk( document.getRootElement() );
}
public void treeWalk(Element element) {
for ( int i = 0, size = element.nodeCount(); i < size; i++ ) {
Node node = element.node(i);
if ( node instanceof Element ) {
treeWalk( (Element) node );
}
else {
// do something....
}
}
}
</pre></div><div class="section"><a name="Creating_a_new_XML_document"></a><h2>Creating a new XML document</h2><p>Often in <i>dom4j</i> you will need to create a new document
from scratch. Here's an example of doing that.
</p><pre>
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
public class Foo {
public Document createDocument() {
Document document = DocumentHelper.createDocument();
Element root = document.addElement( "root" );
Element author1 = root.addElement( "author" )
.addAttribute( "name", "James" )
.addAttribute( "location", "UK" )
.addText( "James Strachan" );
Element author2 = root.addElement( "author" )
.addAttribute( "name", "Bob" )
.addAttribute( "location", "US" )
.addText( "Bob McWhirter" );
return document;
}
}
</pre></div><div class="section"><a name="Writing_a_document_to_a_file"></a><h2>Writing a document to a file</h2><p>A quick and easy way to write a Document (or any Node) to a Writer
is via the write() method.
</p><pre>
FileWriter out = new FileWriter( "foo.xml" );
document.write( out );
</pre><p>If you want to be able to change the format of the output, such as pretty
printing or a compact format, or you want to be able to work with
Writer objects or OutputStream objects as the destination, then you can use the XMLWriter class.
</p><pre>
import org.dom4j.Document;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
public class Foo {
public void write(Document document) throws IOException {
// lets write to a file
XMLWriter writer = new XMLWriter(
new FileWriter( "output.xml" )
);
writer.write( document );
writer.close();
// Pretty print the document to System.out
OutputFormat format = OutputFormat.createPrettyPrint();
writer = new XMLWriter( System.out, format );
writer.write( document );
// Compact format to System.out
format = OutputFormat.createCompactFormat();
writer = new XMLWriter( System.out, format );
writer.write( document );
}
}
</pre></div><div class="section"><a name="Converting_to_and_from_Strings"></a><h2>Converting to and from Strings</h2><p>If you have a reference to a Document or any other Node such as an
Attribute or Element, you can turn it into the default XML text
via the asXML() method.
</p><pre>
Document document = ...;
String text = document.asXML();
</pre><p>If you have some XML as a String you can parse it
back into a Document again using the helper method
DocumentHelper.parseText()
</p><pre>
String text = "<person> <name>James</name> </person>";
Document document = DocumentHelper.parseText(text);
</pre></div><div class="section"><a name="Styling_a_Document_with_XSLT"></a><h2>Styling a Document with XSLT</h2><p>Applying XSLT on a Document is quite straightforward using the
<a href="http://java.sun.com/xml/" class="externalLink" title="External Link">JAXP</a> API from Sun.
This allows you to work against any XSLT engine such as Xalan or SAXON.
Here is an example of using JAXP to create a transformer and then
applying it to a Document.
</p><pre>
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import org.dom4j.Document;
import org.dom4j.io.DocumentResult;
import org.dom4j.io.DocumentSource;
public class Foo {
public Document styleDocument(
Document document,
String stylesheet
) throws Exception {
// load the transformer using JAXP
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer(
new StreamSource( stylesheet )
);
// now lets style the given document
DocumentSource source = new DocumentSource( document );
DocumentResult result = new DocumentResult();
transformer.transform( source, result );
// return the transformed document
Document transformedDoc = result.getDocument();
return transformedDoc;
}
}
</pre></div></div></div><div class="clear"><hr></hr></div><div id="footer"><div class="xright">© 2001-2005, MetaStuff Ltd.</div><div class="clear"><hr></hr></div></div></body></html>
|