URL page_html/css_WEB-ITnose に含まれる良好なリンクと不良なリンクの数を判断するために使用される Swing プログラム

エントリークラス

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import java.awt.Dimension;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.IOException;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JMenuBar;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.ScrollPaneConstants;import javax.swing.SwingUtilities;/** * Description 检查URL是否是合法的URL，入口类，直接运行该类，将需要分析的URL地址粘入文本框即可 *  * @author wangxu *  */public class CheckLinks extends JFrame implements Runnable, ISpiderReportable {	// Used by addNotify	boolean frameSizeAdjusted = false;	JLabel label1 = new JLabel();	JButton begin = new JButton();	JTextField url = new JTextField();	JScrollPane errorScroll = new JScrollPane();	JTextArea errors = new JTextArea();	JLabel current = new JLabel();	JLabel goodLinksLabel = new JLabel();	JLabel badLinksLabel = new JLabel();	protected Thread backgroundThread;	protected Spider spider;	protected URL base;	protected int badLinksCount = 0;	protected int goodLinksCount = 0;	private static final long serialVersionUID = 1L;	public CheckLinks() {		setTitle("Find Broken Links");// 设置JFrame的标题		getContentPane().setLayout(null);// 设置布局方式		setSize(405, 288);		setVisible(true);		label1.setText("Enter a URL:");		getContentPane().add(label1);		label1.setBounds(12, 12, 84, 12);		begin.setText("Begin");		begin.setActionCommand("Begin");		getContentPane().add(begin);		begin.setBounds(12, 36, 84, 24);// 设置坐标和宽、高		getContentPane().add(url);		url.setBounds(108, 36, 288, 24);		errorScroll.setAutoscrolls(true);// 自动显示滚动条		errorScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);// 水平方向始终显示		errorScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);// 垂直方向始终显示		errorScroll.setOpaque(true);// 设置不透明		getContentPane().add(errorScroll);		errorScroll.setBounds(12, 120, 384, 156);		errors.setEditable(false);// 设置不可编辑		errorScroll.getViewport().add(errors);// 将文本域添加进滚动条		errors.setBounds(0, 0, 366, 138);		current.setText("Currently Processing: ");		getContentPane().add(current);// 加入显示当前信息的JLabel		current.setBounds(12, 72, 384, 12);		goodLinksLabel.setText("Good Links: 0");		getContentPane().add(goodLinksLabel);		goodLinksLabel.setBounds(12, 96, 192, 12);		badLinksLabel.setText("Bad Links: 0");		getContentPane().add(badLinksLabel);		badLinksLabel.setBounds(216, 96, 96, 12);		SymAction lSymAction = new SymAction();// 实例化一个事件监听器		begin.addActionListener(lSymAction);// 注册监听	}	static public void main(String args[]) {		new CheckLinks();// 程序入口	}	public void addNotify() {		// Record the size of the window prior to calling parent's addNotify.		Dimension size = getSize();		super.addNotify();		if (frameSizeAdjusted)			return;		frameSizeAdjusted = true;		// Adjust size of frame according to the insets and menu bar		Insets insets = getInsets();		JMenuBar menuBar = getRootPane().getJMenuBar();		int menuBarHeight = 0;		if (menuBar != null)			menuBarHeight = menuBar.getPreferredSize().height;		setSize(insets.left + insets.right + size.width, insets.top + insets.bottom + size.height + menuBarHeight);	}	class SymAction implements ActionListener {		public void actionPerformed(ActionEvent event) {			Object object = event.getSource();			if (object == begin)				begin_actionPerformed(event);		}	}	void begin_actionPerformed(ActionEvent event) {		if (backgroundThread == null) {			begin.setText("Cancel");			backgroundThread = new Thread(this);// 用当前对象来实例化一个Thread对象			backgroundThread.start();// 启动线程，执行run方法			goodLinksCount = 0;			badLinksCount = 0;		} else {			spider.cancel();// 设置标志位true		}	}	@Override	public void run() {		try {			errors.setText("");			spider = new Spider(this);// 用当前对象来实例化一个Spider对象，因为当前类实现了ISpiderReportable接口			spider.clear();			base = new URL(url.getText());// 取得需要搜索的URL地址			spider.addURL(base);//将URL地址加入spider			spider.begin();//spider开始工作			Runnable doLater = new Runnable() {				public void run() {					begin.setText("Begin");				}			};			// 导致 doRun.run() 在 AWT 事件指派线程上异步执行。在所有挂起的 AWT			// 事件被处理后才发生。此方法应该在应用程序线程需要更新该 GUI时使用。在下面的示例中，invokeLater			// 调用将事件指派线程上的 Runnable对象 doHelloWorld加入队列，然后输出一条信息。			SwingUtilities.invokeLater(doLater);			backgroundThread = null;// 将后台线程重新置空，以便接受下一个URL		} catch (MalformedURLException e) {			UpdateErrors err = new UpdateErrors();			err.msg = "Bad address.";			SwingUtilities.invokeLater(err);		}	}	//检测两个URL地址是否属于同一主机，如果是返回true，否则false	@Override	public boolean spiderFoundURL(URL base, URL url) {		UpdateCurrentStats cs = new UpdateCurrentStats();		cs.msg = url.toString();//将URL信息赋值给cs.msg，使用后台线程进行打印		SwingUtilities.invokeLater(cs);		if (!checkLink(url)) {			UpdateErrors err = new UpdateErrors();			err.msg = url + "(on page " + base + ")\n";			SwingUtilities.invokeLater(err);			badLinksCount++;			return false;		}		goodLinksCount++;		if (!url.getHost().equalsIgnoreCase(base.getHost()))			return false;		else			return true;	}	@Override	public void spiderURLError(URL url) {		System.out.println("没找到的URL：" + url);	}	protected boolean checkLink(URL url) {		try {			URLConnection connection = url.openConnection();			connection.connect();			return true;		} catch (IOException e) {			return false;		}	}	public void spiderFoundEMail(String email) {		System.out.println("获得Email：" + email);	}	class UpdateErrors implements Runnable {		public String msg;		public void run() {			errors.append(msg);		}	}	class UpdateCurrentStats implements Runnable {		public String msg;		public void run() {			current.setText("Currently Processing: " + msg);			goodLinksLabel.setText("Good Links: " + goodLinksCount);			badLinksLabel.setText("Bad Links: " + badLinksCount);		}	}}

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