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("\n");

                            }

                        }

                        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;

}