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2010-06-01T05:18:09Z

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в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Accessing character data (CDATA) of XML element ==



<source lang="java">
import java.util.Stack;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class Main extends DefaultHandler {
private Stack currentElement = new Stack();
public void startElement(String uri, String localName, String qName, Attributes attrs)
throws SAXException {
currentElement.push(qName);
}
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
currentElement.pop();
}
public void characters(char[] ch, int start, int length) throws SAXException {
String cdata = new String(ch, start, length);
System.out.println("Element "" + currentElement.peek() + "" contains text: " + cdata);
}
public static void main(String[] args) throws Exception {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating(true);
SAXParser parser = factory.newSAXParser();
parser.parse("sample.xml", new Main());
}
}</source>



== Adding a CDATA Section to a DOM Document ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
// Add a CDATA section to the root element
element = doc.getDocumentElement();
CDATASection cdata = doc.createCDATASection("data");
element.appendChild(cdata);
}
}</source>



== Append and insert data to CharacterData ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.rument;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
CDATASection cdataNode = doc.createCDATASection("");
Comment commentNode = doc.createComment("");
Text textNode = doc.createTextNode("");
// All three types of nodes implement the CharacterData interface
CharacterData cdata = cdataNode;
cdata = commentNode;
cdata = textNode;
// data
int offset = 5;
cdata.insertData(offset, "a ");
cdata.appendData(" b");
}
}</source>



== Converting CDATA Nodes into Text Nodes While Parsing an XML File ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
public class Main {
public static void main(String[] argv) throws Exception{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setCoalescing(true);
Document doc = factory.newDocumentBuilder().parse(new File("infilename.xml"));
// doc will not contain any CDATA nodes
}
}</source>



== Delete data from CharacterData ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.rument;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
CDATASection cdataNode = doc.createCDATASection("");
Comment commentNode = doc.createComment("");
Text textNode = doc.createTextNode("");
// All three types of nodes implement the CharacterData interface
CharacterData cdata = cdataNode;
cdata = commentNode;
cdata = textNode;
// Delete text
int offset = 0;
int len = 5;
cdata.deleteData(offset, len);
}
}</source>



== Get character data (CDATA) from xml document ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CharacterData;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class Main {
public static void main(String[] args) throws Exception {
File file = new File("data.xml");
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(file);
NodeList nodes = doc.getElementsByTagName("topic");
for (int i = 0; i < nodes.getLength(); i++) {
Element element = (Element) nodes.item(i);
NodeList title = element.getElementsByTagName("title");
Element line = (Element) title.item(0);
System.out.println("Title: " + getCharacterDataFromElement(line));
}
}
public static String getCharacterDataFromElement(Element e) {
Node child = e.getFirstChild();
if (child instanceof CharacterData) {
CharacterData cd = (CharacterData) child;
return cd.getData();
}
return "";
}
}</source>



== Get substring from CharacterData ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.rument;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
CDATASection cdataNode = doc.createCDATASection("");
Comment commentNode = doc.createComment("");
Text textNode = doc.createTextNode("");
// All three types of nodes implement the CharacterData interface
CharacterData cdata = cdataNode;
cdata = commentNode;
cdata = textNode;
cdata.setData("some data");
int len = cdata.getLength();
int offset = 5;
len = 4;
String s = cdata.substringData(offset, len);
}
}</source>



== Replace Data in CharacterData ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.rument;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
CDATASection cdataNode = doc.createCDATASection("");
Comment commentNode = doc.createComment("");
Text textNode = doc.createTextNode("");
// All three types of nodes implement the CharacterData interface
CharacterData cdata = cdataNode;
cdata = commentNode;
cdata = textNode;
// Replace text
String replacement = "c";
int offset = 10;
int len = 6;
cdata.replaceData(offset, len, replacement);
}
}</source>



== Set Data to Character Data ==



<source lang="java">
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.rument;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public class Main {
public static void main(String[] argv) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(true);
factory.setExpandEntityReferences(false);
Document doc = factory.newDocumentBuilder().parse(new File("filename"));
Element element = doc.getElementById("key1");
CDATASection cdataNode = doc.createCDATASection("");
Comment commentNode = doc.createComment("");
Text textNode = doc.createTextNode("");

CharacterData cdata = cdataNode;
cdata = commentNode;
cdata = textNode;
cdata.setData("some data");
int len = cdata.getLength();
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010