Java/Development Class/Document HTML
Содержание
HTMLDocument: Element Iterator Example
<source lang="java">
/* Definitive Guide to Swing for Java 2, Second Edition By John Zukowski ISBN: 1-893115-78-X Publisher: APress
- /
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 ElementIteratorExample {
public static void main(String args[]) throws Exception {
if (args.length != 1) {
System.err.println("Usage: java ElementIteratorExample input-URL");
}
// Load HTML file synchronously
URL url = new URL(args[0]);
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);
// Parse
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) || (name == HTML.Tag.H2) || (name == HTML.Tag.H3))) {
// Build up content text as it may be within multiple elements
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());
}
}
System.exit(0);
}
}
</source>
HTMLEditorKit Demo
<source lang="java">
/* Definitive Guide to Swing for Java 2, Second Edition By John Zukowski ISBN: 1-893115-78-X Publisher: APress
- /
import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.io.FileReader; import java.io.IOException; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.JButton; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.text.JTextComponent; import javax.swing.text.html.HTMLDocument; import javax.swing.text.html.HTMLEditorKit; import javax.swing.text.html.parser.ParserDelegator; public class LoadSync {
public static void main(String args[]) {
final String filename = "Test.html";
JFrame frame = new JFrame("Loading/Saving Example");
Container content = frame.getContentPane();
final JEditorPane editorPane = new JEditorPane();
editorPane.setEditable(false);
JScrollPane scrollPane = new JScrollPane(editorPane);
content.add(scrollPane, BorderLayout.CENTER);
editorPane.setEditorKit(new HTMLEditorKit());
JPanel panel = new JPanel();
// Setup actions
Action loadAction = new AbstractAction() {
{
putValue(Action.NAME, "Load");
}
public void actionPerformed(ActionEvent e) {
doLoadCommand(editorPane, filename);
}
};
JButton loadButton = new JButton(loadAction);
panel.add(loadButton);
content.add(panel, BorderLayout.SOUTH);
frame.setSize(250, 150);
frame.setVisible(true);
}
public static void doLoadCommand(JTextComponent textComponent,
String filename) {
FileReader reader = null;
try {
System.out.println("Loading");
reader = new FileReader(filename);
// Create empty HTMLDocument to read into
HTMLEditorKit htmlKit = new HTMLEditorKit();
HTMLDocument htmlDoc = (HTMLDocument) htmlKit
.createDefaultDocument();
// Create parser (javax.swing.text.html.parser.ParserDelegator)
HTMLEditorKit.Parser parser = new ParserDelegator();
// Get parser callback from document
HTMLEditorKit.ParserCallback callback = htmlDoc.getReader(0);
// Load it (true means to ignore character set)
parser.parse(reader, callback, true);
// Replace document
textComponent.setDocument(htmlDoc);
System.out.println("Loaded");
} catch (IOException exception) {
System.out.println("Load oops");
exception.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException ignoredException) {
}
}
}
}
}
</source>
SimpleAttributeSet Example
<source lang="java">
/* Definitive Guide to Swing for Java 2, Second Edition By John Zukowski ISBN: 1-893115-78-X Publisher: APress
- /
import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.DefaultStyledDocument; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; public class SimpleAttributeSample {
public static void main(String args[]) {
JFrame frame = new JFrame("Simple Attributes");
Container content = frame.getContentPane();
StyledDocument document = new DefaultStyledDocument();
SimpleAttributeSet attributes = new SimpleAttributeSet();
attributes.addAttribute(StyleConstants.CharacterConstants.Bold,
Boolean.TRUE);
attributes.addAttribute(StyleConstants.CharacterConstants.Italic,
Boolean.TRUE);
// Insert content
try {
document.insertString(document.getLength(), "Hello Java",
attributes);
} catch (BadLocationException badLocationException) {
System.err.println("Oops");
}
attributes = new SimpleAttributeSet();
attributes.addAttribute(StyleConstants.CharacterConstants.Bold,
Boolean.FALSE);
attributes.addAttribute(StyleConstants.CharacterConstants.Italic,
Boolean.FALSE);
attributes.addAttribute(StyleConstants.CharacterConstants.Foreground,
Color.lightGray);
// Insert content
try {
document.insertString(document.getLength(),
" - Good-bye Visual Basic", attributes);
} catch (BadLocationException badLocationException) {
System.err.println("Oops");
}
JTextPane textPane = new JTextPane(document);
textPane.setEditable(false);
JScrollPane scrollPane = new JScrollPane(textPane);
content.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
</source>
Styled Document
<source lang="java">
/* Definitive Guide to Swing for Java 2, Second Edition By John Zukowski ISBN: 1-893115-78-X Publisher: APress
- /
import java.awt.BorderLayout; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.DefaultStyledDocument; import javax.swing.text.Style; import javax.swing.text.StyleConstants; import javax.swing.text.StyleContext; import javax.swing.text.StyledDocument; public class StyledSample {
public static void main(String args[]) {
String BOLD_ITALIC = "BoldItalic";
String GRAY_PLAIN = "Gray";
JFrame frame = new JFrame("Simple Attributes");
Container content = frame.getContentPane();
StyledDocument document = new DefaultStyledDocument();
Style style = (Style) document.getStyle(StyleContext.DEFAULT_STYLE);
StyleConstants.setBold(style, true);
StyleConstants.setItalic(style, true);
document.addStyle(BOLD_ITALIC, null);
// style = document.getStyle(StyleContext.DEFAULT_STYLE);
// StyleConstants.setBold(style, false);
// StyleConstants.setItalic(style, false);
// StyleConstants.setForeground(style, Color.lightGray);
// document.addStyle(GRAY_PLAIN, null);
style = document.getStyle(BOLD_ITALIC);
// Insert content
try {
document.insertString(document.getLength(), "Hello Java\n", style);
} catch (BadLocationException badLocationException) {
System.err.println("Oops");
}
style = document.getStyle(GRAY_PLAIN);
// Insert content
try {
document.insertString(document.getLength(),
" - Good-bye Visual Basic\n", style);
} catch (BadLocationException badLocationException) {
System.err.println("Oops");
}
JTextPane textPane = new JTextPane(document);
textPane.setEditable(false);
JScrollPane scrollPane = new JScrollPane(textPane);
content.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
</source>
Text Tab Sample
<source lang="java">
/* Definitive Guide to Swing for Java 2, Second Edition By John Zukowski ISBN: 1-893115-78-X Publisher: APress
- /
import java.awt.BorderLayout; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.DefaultStyledDocument; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; import javax.swing.text.TabSet; import javax.swing.text.TabStop; public class TextTabSample {
public static void main(String args[]) {
JFrame frame = new JFrame("Tab Attributes");
Container content = frame.getContentPane();
StyledDocument document = new DefaultStyledDocument();
int positions[] = { TabStop.ALIGN_BAR, TabStop.ALIGN_CENTER,
TabStop.ALIGN_DECIMAL, TabStop.ALIGN_LEFT, TabStop.ALIGN_RIGHT };
String strings[] = { "\tBAR\n", "\tCENTER\n", "\t3.14159265\n",
"\tLEFT\n", "\tRIGHT\n" };
SimpleAttributeSet attributes = new SimpleAttributeSet();
for (int i = 0, n = positions.length; i < n; i++) {
TabStop tabstop = new TabStop(150, positions[i], TabStop.LEAD_DOTS);
try {
int position = document.getLength();
document.insertString(position, strings[i], null);
TabSet tabset = new TabSet(new TabStop[] { tabstop });
StyleConstants.setTabSet(attributes, tabset);
document.setParagraphAttributes(position, 1, attributes, false);
} catch (BadLocationException badLocationException) {
System.err.println("Oops");
}
}
JTextPane textPane = new JTextPane(document);
textPane.setEditable(false);
JScrollPane scrollPane = new JScrollPane(textPane);
content.add(scrollPane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
</source>
