壓縮檔案相關技術
1.題目
做一個多層資料夾壓縮包的釋放的工具。
2.解題思路
建立一個類別:UnZipDirectoryFrame
使用UnZipDirectoryFrame繼承JFrame建構窗體
壓縮包內會有多個資料夾,每個資料夾可能會有資料夾或是文件,為了解壓縮時能還原出資料夾的層次關係。
解壓縮包含子資料夾的資料夾方案和解壓縮全是文件的資料夾類似,區別在於如何找出包含子資料夾的資料夾的所有文件,並且建構ZipEntry時,不要有重名的情況。
3.程式碼詳解
package com.xiaoxuzhu;
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.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.table.DefaultTableModel;
/**
* Description: 多层文件夹压缩包的释放
*
* @author xiaoxuzhu
* @version 1.0
*
* <pre class="brush:php;toolbar:false">
* 修改记录:
* 修改后版本 修改人 修改日期 修改内容
* 2022/5/4.1 xiaoxuzhu 2022/5/4 Create
*
登入後複製
* @date 2022/5/4
*/
public class UnZipDirectoryFrame extends JFrame {
/**
*
*/
private static final long serialVersionUID = 7178478435446172846L;
private JPanel contentPane;
private JTextField chooseTextField;
private JTable table;
private File zipFile;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UnZipDirectoryFrame frame = new UnZipDirectoryFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public UnZipDirectoryFrame() {
setTitle("多层文件夹压缩包的释放");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
JPanel choosePanel = new JPanel();
contentPane.add(choosePanel, BorderLayout.NORTH);
chooseTextField = new JTextField();
choosePanel.add(chooseTextField);
chooseTextField.setColumns(18);
JButton chooseButton = new JButton("选择压缩文件");
chooseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
do_chooseButton_actionPerformed(arg0);
}
});
choosePanel.add(chooseButton);
JPanel buttonPanel = new JPanel();
contentPane.add(buttonPanel, BorderLayout.SOUTH);
JButton unzipButton = new JButton("开始解压缩");
unzipButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
do_unzipButton_actionPerformed(arg0);
}
});
buttonPanel.add(unzipButton);
JScrollPane scrollPane = new JScrollPane();
contentPane.add(scrollPane, BorderLayout.CENTER);
table = new JTable();
scrollPane.setViewportView(table);
}
protected void do_chooseButton_actionPerformed(ActionEvent arg0) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileFilter(new FileNameExtensionFilter("文本文件", "zip"));
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
int result = fileChooser.showOpenDialog(this);
if (result == JFileChooser.APPROVE_OPTION) {
zipFile = fileChooser.getSelectedFile();
chooseTextField.setText(zipFile.getAbsolutePath());
}
}
protected void do_unzipButton_actionPerformed(ActionEvent arg0) {
DefaultTableModel model = (DefaultTableModel) table.getModel();
model.setColumnIdentifiers(new Object[] { "序号", "文件名" });
List
list = new ArrayList();
try {
unzip(zipFile, list);
for (int i = 0; i < list.size(); i++) {
model.addRow(new Object[] { i + 1, list.get(i) });
}
table.setModel(model);
JOptionPane.showMessageDialog(this, "解压缩完成");
} catch (IOException e) {
e.printStackTrace();
}
}
private static void unzip(File zipFile, List list) throws IOException {
// 利用用户选择的ZIP文件创建ZipInputStream对象
ZipInputStream in = new ZipInputStream(new FileInputStream(zipFile));
ZipEntry entry;
while ((entry = in.getNextEntry()) != null) {// 遍历所有ZipEntry对象
if (!entry.isDirectory()) {// 如果是文件则创建并写入
File tempFile = new File(zipFile.getParent() + File.separator + entry.getName());
list.add(tempFile.getName());// 增加文件名
new File(tempFile.getParent()).mkdirs();// 创建文件夹
tempFile.createNewFile();// 创建新文件
FileOutputStream out = new FileOutputStream(tempFile);
int b;
while ((b = in.read()) != -1) {// 写入数据
out.write(b);
}
out.close();// 释放资源
}
}
in.close();
}
}
解壓縮成功:
以上是怎麼使用Java實作多層資料夾壓縮功能的詳細內容。更多資訊請關注PHP中文網其他相關文章!