HTML解析ツールを作る(4ページ目)

プログラムのダウンロード

ダウンロード開始

ソースコード

●FreeHtmlAnalyzer.java

package jp.tuyano;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.URL;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.parser.ParserDelegator;

public class FreeHtmlAnalyzer extends JFrame
    implements ActionListener,HyperlinkListener {
  private static final long serialVersionUID = 1L;
  private JTextField url;
  private JButton load,analyze;
  private JEditorPane html;
  private JTextArea src,href;

  public static void main(String[] args) {
    new FreeHtmlAnalyzer().setVisible(true);
  }
  
  public FreeHtmlAnalyzer(){
    this.setSize(300,300);
    Container pane = this.getContentPane();
    pane.setLayout(new BorderLayout());
    JPanel p1 = new JPanel();
    p1.setLayout(new BorderLayout());
    pane.add(p1,BorderLayout.NORTH);
    url = new JTextField();
    p1.add(url,BorderLayout.CENTER);
    JPanel p2 = new JPanel();
    p2.setLayout(new GridLayout(1,2));
    p1.add(p2,BorderLayout.EAST);
    load = new JButton("load");
    load.addActionListener(this);
    p2.add(load);
    analyze = new JButton("analyze");
    analyze.addActionListener(this);
    p2.add(analyze);
    JPanel p3 = new JPanel();
    p3.setLayout(new GridLayout(2,1));
    pane.add(p3,BorderLayout.CENTER);
    html = new JEditorPane();
    html.setEditable(false);
    html.addHyperlinkListener(this);
    p3.add(new JScrollPane(html));
    JPanel p4 = new JPanel();
    p4.setLayout(new GridLayout(2,1));
    p3.add(p4);
    src = new JTextArea();
    p4.add(new JScrollPane(src));
    href = new JTextArea();
    p4.add(new JScrollPane(href));
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
  
  
  public void hyperlinkUpdate(HyperlinkEvent ev) {
    if (ev.getEventType() == HyperlinkEvent.EventType.ACTIVATED){
      try {
        URL u = ev.getURL();
        url.setText(u.toString());
        html.setPage(u);
      } catch (IOException ex) {
        ex.printStackTrace();
      }
    }
  }

  public void actionPerformed(ActionEvent ev){
    if (ev.getSource() == load) load();
    if (ev.getSource() == analyze) analyze();
  }
  
  public void load(){
    try {
      html.setPage(url.getText());

    } catch (IOException ex) {
      ex.printStackTrace();
      JOptionPane.showMessageDialog(this,"Webページの読み込みに失敗しました。");
    }
  }
  
  public void analyze(){
    src.setText("<IMG SRC>リスト\n");
    href.setText("<A HREF>リスト\n");
    try {
      URL u = new URL(url.getText());
      InputStream is = u.openStream();
      BufferedReader br = new BufferedReader(new InputStreamReader(is));
      ParserDelegator pd = new ParserDelegator();
      HTMLEditorKit.ParserCallback cb = new MyParserCallback(this);
      pd.parse(br, cb, true);
    } catch (IOException ex) {
      ex.printStackTrace();
      JOptionPane.showMessageDialog(this,"Webページの読み込みに失敗しました。");
    }
  }
  
  public void addHref(String s){
    href.append(s + "\n");
  }
  public void addSrc(String s){
    src.append(s + "\n");
  }
}