ZipInputStream的用法

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;
}