毕业设计! 用Java设计一个文件的压缩与解压缩软件! 跪求!

需要一个可视化界面!谢谢!
2025-04-02 01:50:11
推荐回答(2个)
回答1:

这是我以前写的一个,你看看,应该和这个差不多。。。。

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import javax.swing.JFrame;

public class TestZip extends JFrame implements ActionListener {

private static final long serialVersionUID = 1L;

String doc;
long doczipsize = 0;
TextArea ta;
TextField infotip;

public void init() {

setLocation(200,150);
setTitle("文件压缩器");
setSize(600,450);

BorderLayout b = new BorderLayout();
setLayout(b);

MenuBar menubar = new MenuBar();
setMenuBar(menubar);

Menu fileMenu = new Menu("File",true);
Menu aboutMenu = new Menu("About",true);

MenuItem mi1 = new MenuItem("打开");
MenuItem mi2 = new MenuItem("压缩");
MenuItem mi3 = new MenuItem("解压");
MenuItem mi4 = new MenuItem("退出");

MenuItem mi0 = new MenuItem("关于");

fileMenu.add(mi1);
fileMenu.add(mi2);
fileMenu.add(mi3);
fileMenu.add(mi4);

aboutMenu.add(mi0);

menubar.add(fileMenu);
menubar.add(aboutMenu);

mi1.addActionListener(this);
mi2.addActionListener(this);
mi3.addActionListener(this);
mi4.addActionListener(this);
mi0.addActionListener(this);

ta = new TextArea();
add(BorderLayout.CENTER,ta);

infotip = new TextField();
add(BorderLayout.SOUTH,infotip);

setVisible(true);
}

private void newFile() {

FileDialog dlg = new FileDialog(this,"打开",FileDialog.LOAD);
dlg.setVisible(true);

String filename = dlg.getDirectory() + dlg.getFile();

try {

File f = new File(filename);

FileReader freader = new FileReader(f);
char[] buffer = new char[4096];
int length;
ta.setText("");
while((length = freader.read(buffer)) != -1) {
String s = new String(buffer,0,length);
doc += s;
}
freader.close();
doczipsize = f.length();
showTextInfo();

}catch (IOException e) {
e.printStackTrace();
}
}

private void openFile() {

FileDialog dlg = new FileDialog(this,"解压",FileDialog.LOAD);
dlg.setVisible(true);

String filename = dlg.getDirectory() + dlg.getFile();

try {

File ff = new File(filename);
if(!ff.exists()) {
return;
}

FileInputStream fileis = new FileInputStream(ff);

ZipInputStream zipis = new ZipInputStream(fileis);
zipis.getNextEntry();

DataInputStream dis = new DataInputStream(zipis);

doc = dis.readUTF();

dis.close();
doczipsize = ff.length();
showTextInfo();

}catch (IOException e) {
e.printStackTrace();
}
}

private void saveFile() {

FileDialog dlg = new FileDialog(this,"压缩",FileDialog.LOAD);
dlg.setVisible(true);

String filename = dlg.getDirectory() + dlg.getFile();

try {

if(!filename.endsWith(".zip")) {
filename += ".zip";
}

File f = new File(filename);

if(!f.exists()) {
f.createNewFile();
}

FileOutputStream fileos = new FileOutputStream(f);

ZipOutputStream zipos = new ZipOutputStream(fileos);
zipos.setMethod(ZipOutputStream.DEFLATED);
zipos.putNextEntry(new ZipEntry("zip"));

DataOutputStream dos = new DataOutputStream(zipos);
/*
doc = "";
doc = ta.getText();
*/
dos.writeUTF(doc);
dos.close();
doczipsize = f.length();
showTextInfo();

} catch (IOException e) {
e.printStackTrace();
}
}

public static void main(String[] args) {

TestZip zip = new TestZip();
zip.init();
}

private void showTextInfo() {

ta.replaceRange(doc, 0, ta.getText().length());
infotip.setText("uncompressed size:" + doc.length() + " compressed size:" + doczipsize);
}

public void actionPerformed(ActionEvent e) {

String arg = e.getActionCommand();

if("打开".equals(arg)) {

newFile();

} else if("压缩".equals(arg)) {

saveFile();

} else if("解压".equals(arg)) {

openFile();

} else if("退出".equals(arg)) {

System.exit(0);

} else if("关于".equals(arg)) {

}
}

}

回答2:

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

/**
* 压缩文件
* @param filePath 文件所在路径
* @param fileName 文件名称
* @param fileType 将要压缩的文件类型
* @return 压缩后的文件路径和名称。
*/
public static String zipFiles(String filePath,String fileName,String fileType)
{
File file = new File(filePath);
File[] fA = file.listFiles();
if(fA.length==0){System.out.println("null dir!");return "";}

try {
FileOutputStream f = new FileOutputStream(filePath+fileName+".zip");
ZipOutputStream out = new ZipOutputStream(new DataOutputStream(f));
DataInputStream in = null;
for (int i = 0; i < fA.length; i++) {
if(fA[i].isFile() && fA[i].getName().indexOf(fileType)!=-1)
{
if(fA[i].exists())
{
System.out.println("【正在压缩文件】" + fA[i]);
in = new DataInputStream(new FileInputStream(fA[i]));
out.putNextEntry(new ZipEntry(fA[i].getName()));
int c;
while ((c = in.read()) != -1)
{
out.write(c);
}
}
}
}
in.close();
out.close();

} catch (Exception e) {
e.printStackTrace();
}
return filePath+fileName+".zip";
}

这是压缩的算法,解压缩你自己再研究下吧。俺没弄过。记得下载一个包:org.apache.tools下个ant.jar的包。

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