API Para Utilizar um Navegador Web na Aplicação

Programação Java
#1

Boa Tarde pessoal,

Estou desenvolvendo uma aplicação que será necessário o uso de um web browser. Nos ambientes de programação da Microsoft sempre reparei que tem um componente WebBrowser.

No Java eu nunca ouvi falar, alguém sabe de uma biblioteca que posso utilizar para fazer essa função?

Obrigado

#2

Eu achei esse código que simula um browser em java, porém nao é um browser ele usa esse JEditor pra mostrar a página html baixada com isso as funcionalidades básicas como cookies, javascript e outras não são aceitas…


import javax.swing.text.html.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

/**
   A simple Web Browser with minimal functionality.
   @author Jose M. Vidal
*/
public class Browser {

	/** Set the page.
		@param jep the pane on which to display the url
		@param url the url to display */
 	protected static void setPage(JEditorPane jep, String url){
		try {
			jep.setPage(url);
		}
		catch (IOException e) {
			System.err.println(e);
			System.exit(-1);
		}

	}

	/** An inner class which listens for keypresses on the Back button. */
	class backButtonListener implements ActionListener {
		protected JEditorPane jep;
		protected JLabel label;
		protected JButton backButton;
		protected Vector history;
		public backButtonListener(JEditorPane jep, JButton backButton, Vector history, JLabel label){
			this.jep = jep;
			this.backButton = backButton;
			this.history = history;
			this.label = label;
		}

		/** The action is to show the last url in the history.
		 @param e the event*/
		public void actionPerformed(ActionEvent e){
			try{
				//the current page is the last, remove it
				String curl = (String)history.lastElement();
				history.removeElement(curl);
					
				curl = (String)history.lastElement();
				System.out.println("Back to " + curl);
				setPage(jep,curl);
				label.setText("<html><b>URL:</b> "+ curl);
				if (history.size() == 1)
					backButton.setEnabled(false);
			}
			catch (Exception ex){
				System.out.println("Exception " + ex);
			}
		}
	}

	/** An inner class that listens for hyperlinkEvent.*/
	class LinkFollower implements HyperlinkListener {
		protected JEditorPane jep;
		protected JLabel label;
		protected JButton backButton;
		protected Vector history;
		public LinkFollower(JEditorPane jep, JButton backButton, Vector history, JLabel label){
			this.jep = jep;
			this.backButton = backButton; 
			this.history = history;
			this.label = label;
		}
		/** The action is to show the page of the URL the user clicked on.
			@param evt the event. We only care when its type is ACTIVATED. */
		public void hyperlinkUpdate(HyperlinkEvent evt){
			if (evt.getEventType() == HyperlinkEvent.EventType.ACTIVATED){
				try {
					String currentURL = evt.getURL().toString();
					history.add(currentURL);
					backButton.setEnabled(true);
					System.out.println("Going to " + currentURL);
					setPage(jep,currentURL);
					label.setText("<html><b>URL:</b> "+ currentURL);
				}
				catch (Exception e) {
					System.out.println("ERROR: Trouble fetching url");
				}
			}
		}

	}

	/** The contructor runs the browser. It displays the main frame with the
		fetched initialPage
		@param initialPage the first page to show */
 	public Browser(String initialPage){

		/** A vector of String containing the past urls */
		Vector history = new Vector();
		history.add(initialPage);
		
		// set up the editor pane
		JEditorPane jep = new JEditorPane();
		jep.setEditable(false);
		setPage(jep, initialPage);

		// set up the window
		JScrollPane scrollPane = new JScrollPane(jep);     
		JFrame f = new JFrame("Simple Web Browser");
		f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

		//Exit the program when user closes window.
		f.addWindowListener(new WindowAdapter() {
				public void windowClosing(WindowEvent e){
					System.exit(0);
				}
			});

		//Label where we show the url
		JLabel label = new JLabel("<html><b>URL:</b> "+ initialPage);

		
		JButton backButton = new JButton ("Back");
		backButton.setActionCommand("back");
		backButton.setToolTipText("Go to previous page");
		backButton.setEnabled(false);
		backButton.addActionListener(new backButtonListener(jep, backButton, history, label));

		JButton exitButton = new JButton ("Exit");
		exitButton.setActionCommand("exit");
		exitButton.setToolTipText("Quit this application");
		exitButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					System.exit(0);
				}
			});

		//A toolbar to hold all our buttons
		JToolBar toolBar = new JToolBar();
		toolBar.add(backButton);
		toolBar.add(exitButton);


		jep.addHyperlinkListener(new LinkFollower(jep, backButton, history, label));

		//Set up the toolbar and scrollbar in the contentpane of the frame
		JPanel contentPane = (JPanel)f.getContentPane();
		contentPane.setLayout(new BorderLayout());
		contentPane.setPreferredSize(new Dimension(400, 100));
		contentPane.add(toolBar, BorderLayout.NORTH);
		contentPane.add(scrollPane, BorderLayout.CENTER);
		contentPane.add(label, BorderLayout.SOUTH);

		f.pack();
		f.setSize(640, 360);
		f.setVisible(true);


	}

	/** Create a Browser object. Use the command-line url if given */
	public static void main(String[] args) {
		String initialPage = new String("http://www.cse.sc.edu");

		if (args.length > 0) initialPage = args[0];

		Browser b = new Browser(initialPage);
	}
	
}
#3