в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:12:04Z

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== ElementIterator: first() ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;
public class MainClass {
public static void main(final String args[]) {
JFrame frame = new JFrame("Element Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JTextArea textArea = new JTextArea();
JScrollPane scrollPane = new JScrollPane(textArea);
JButton button = new JButton("Show Elements");
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Document document = textArea.getDocument();
ElementIterator iterator = new ElementIterator(document);
Element element = iterator.first();
while (element != null) {
System.out.println(element.getStartOffset());
element = iterator.next();
}
}
};
button.addActionListener(actionListener);
frame.add(scrollPane, BorderLayout.CENTER);
frame.add(button, BorderLayout.SOUTH);
frame.setSize(250, 250);
frame.setVisible(true);
}
}

</source>



== ElementIterator: next() ==



<source lang="java">
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;
public class MainClass {
public static void main(final String args[]) {
JFrame frame = new JFrame("Element Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JTextArea textArea = new JTextArea();
JScrollPane scrollPane = new JScrollPane(textArea);
JButton button = new JButton("Show Elements");
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
Document document = textArea.getDocument();
ElementIterator iterator = new ElementIterator(document);
Element element = iterator.first();
while (element != null) {
System.out.println(element.getStartOffset());
element = iterator.next();
}
}
};
button.addActionListener(actionListener);
frame.add(scrollPane, BorderLayout.CENTER);
frame.add(button, BorderLayout.SOUTH);
frame.setSize(250, 250);
frame.setVisible(true);
}
}

</source>



== new ElementIterator(Document document) ==



<source lang="java">
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.text.AttributeSet;
import javax.swing.text.Element;
import javax.swing.text.ElementIterator;
import javax.swing.text.StyleConstants;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.parser.ParserDelegator;
public class MainClass {
public static void main(String args[]) throws Exception {
URL url = new URL("http://www.jexp.ru");
URLConnection connection = url.openConnection();
InputStream is = connection.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
HTMLEditorKit htmlKit = new HTMLEditorKit();
HTMLDocument htmlDoc = (HTMLDocument) htmlKit.createDefaultDocument();
HTMLEditorKit.Parser parser = new ParserDelegator();
HTMLEditorKit.ParserCallback callback = htmlDoc.getReader(0);
parser.parse(br, callback, true);
ElementIterator iterator = new ElementIterator(htmlDoc);
Element element;
while ((element = iterator.next()) != null) {
AttributeSet attributes = element.getAttributes();
Object name = attributes.getAttribute(StyleConstants.NameAttribute);
if ((name instanceof HTML.Tag) && (name == HTML.Tag.H1)) {
StringBuffer text = new StringBuffer();
int count = element.getElementCount();
for (int i = 0; i < count; i++) {
Element child = element.getElement(i);
AttributeSet childAttributes = child.getAttributes();
if (childAttributes.getAttribute(StyleConstants.NameAttribute) == HTML.Tag.CONTENT) {
int startOffset = child.getStartOffset();
int endOffset = child.getEndOffset();
int length = endOffset - startOffset;
text.append(htmlDoc.getText(startOffset, length));
}
}
System.out.println(name + ": " + text.toString());
}
}
}
}

</source>

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в 17:43, 31 мая 2010

Admin: 1 версия