package com.example.io; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.File; import java.io.FileInputStream; import java.util.List; import java.util.Scanner; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import javax.swing.JComboBox; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.SwingWorker; public class ZipTest { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { ZipTestFrame frame = new ZipTestFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }); } } class ZipTestFrame extends JFrame { public ZipTestFrame() { setTitle("ZipTest"); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); JMenuBar menuBar = new JMenuBar(); JMenu menu = new JMenu("File"); JMenuItem openItem = new JMenuItem("Open"); menu.add(openItem); openItem.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JFileChooser chooser = new JFileChooser(); chooser.setCurrentDirectory(new File(".")); int r = chooser.showOpenDialog(ZipTestFrame.this); if(r == JFileChooser.APPROVE_OPTION) { zipname = chooser.getSelectedFile().getPath(); fileCombo.removeAllItems(); scanZipFile(); } } }); JMenuItem exitItem = new JMenuItem("Exit"); menu.add(exitItem); exitItem.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.exit(0); } }); menuBar.add(menu); setJMenuBar(menuBar); fileText = new JTextArea(); fileCombo = new JComboBox(); fileCombo.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { loadZipFile((String) fileCombo.getSelectedItem()); } }); add(fileCombo, BorderLayout.SOUTH); add(new JScrollPane(fileText), BorderLayout.CENTER); } public void scanZipFile() { new SwingWorker<Void, String> () { @Override protected void process(List<String> names) { for (String name : names) { fileCombo.addItem(name); } } @Override protected Void doInBackground() throws Exception { ZipInputStream zin = new ZipInputStream(new FileInputStream(zipname)); ZipEntry entry; while((entry = zin.getNextEntry()) != null) { publish(entry.getName()); zin.closeEntry(); } zin.close(); return null; } }.execute(); } public void loadZipFile(final String name) { fileCombo.setEnabled(false); fileText.setText(""); new SwingWorker<Void, Void>() { @Override protected void done() { fileCombo.setEnabled(true); } @Override protected Void doInBackground() throws Exception { try { ZipInputStream zin = new ZipInputStream(new FileInputStream(zipname)); ZipEntry entry; while((entry = zin.getNextEntry()) != null) { if(entry.getName().equals(name)) { Scanner in = new Scanner(zin); while(in.hasNextLine()) { fileText.append(in.nextLine()); fileText.append(" "); } } zin.closeEntry(); } zin.close(); } catch (Exception e) { e.printStackTrace(); } return null; } }.execute(); } public static final int DEFAULT_WIDTH = 400; public static final int DEFAULT_HEIGHT = 300; private JComboBox fileCombo; private JTextArea fileText; private String zipname; }