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这个接着上一篇的，上一篇的gzip可能只有图片，没有详细的代码，这一次加上详细的代码，方便大佬们的指正，希望同学们也可以从中获取一点知识嘿嘿。(完整的带上swing窗口可选择压缩解压，并可以选择文件路径位置)

package javaapplication6;import java.awt.*;import java.awt.BorderLayout;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.*;import java.io.File;import java.util.*;import java.util.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class window extends JFrame implements ActionListener{
           private static Object gzip;    private static Object ungzip;   private JButton display;   private JPanel panel;   private double result;   private String lastCommand;   public String writepath;   public  byte[] ret1;   public  String s;   public  String b;    JButton q = new JButton("打开文件");    JFrame frame=new JFrame("Java文本框组件示例");    //创建Frame窗口        JPanel jp=new JPanel();    //创建面板        JTextField txtfield1=new JTextField();    //创建文本框public static void main(String[] args) {
     // TODO 自动生成的方法存根      new window(); }

public window(){
         setLayout(new BorderLayout());      ActionListener gzip = new zipAction();      ActionListener ungzip = new unzipAction();      panel = new JPanel();      panel.setLayout(new GridLayout(4, 4));      addButton("压缩", gzip);      addButton("解压", ungzip);      add(panel, BorderLayout.CENTER);    q.setActionCommand("open");    q.setBackground(Color.GREEN);//设置按钮颜色      this.getContentPane().add(q, BorderLayout.SOUTH);//建立容器使用边界布局       q.addActionListener(this);        txtfield1.setText("地址文本框");    //设置文本框的内        txtfield1.setHorizontalAlignment(JTextField.CENTER);    //居中对齐        jp.add(txtfield1);        this .add(jp,BorderLayout.WEST);          this.add(panel);          this.setBounds(600,600,600,600);        this.setTitle("gzip压缩解压");this.setSize(333, 288);this.setVisible(true);  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}

public void actionPerformed(ActionEvent e){
         if (e.getActionCommand().equals("open"))    {
      JFileChooser jf = new JFileChooser();   jf.showOpenDialog(this);//显示打开的文件对话框                        File f =  jf.getSelectedFile();//使用文件类获取选择器选择的文件                        String s = f.getAbsolutePath();//返回路径名                        txtfield1.setText(s);                           } }private void addButton(String label, ActionListener listener)   {
         JButton button = new JButton(label);      button.addActionListener(listener);     panel.add(button);   }

public class zipAction implements ActionListener   {
         public void actionPerformed(ActionEvent event)      {
            s=txtfield1.getText();        File file = new File(s);        System.out.println(s);        try        {
           FileInputStream in = new FileInputStream(file);        byte[] data = new byte[in.available()];        in.read(data);        in.close();        System.out.println("文件原始大小:" + data.length);        byte[] ret1 =gzips(data);           Scanner jj=new Scanner(System.in);           System.out.println("中转位置");          String writepath=s;          System.out.println("文件压缩之后大小:" + ret1.length);        FileOutputStream fos = new FileOutputStream(writepath);        fos.write(ret1);        fos.close();           JOptionPane.showMessageDialog(null, "压缩成功", "标题",JOptionPane.WARNING_MESSAGE);         }        catch(Exception e){
           }    }} public class unzipAction implements ActionListener   {
         public void actionPerformed(ActionEvent event)      {
                     try        {
           //测试压缩        s=txtfield1.getText();        File file1 = new File(s);//路径的读取之后转换为文件        FileInputStream with = new FileInputStream(file1);//建立文件输入流with        byte[] giv = new byte[with.available()];//将文件转化为字节类型数组byte[] giv               with.read(giv);//读取字节数组giv        with.close();//关闭文件输入流        System.out.println("解压前的大小" + giv.length);        String writePath=s;        byte[] ret2 =ungzips(giv);//解压giv，之后转换为字节类型数组byte[] ret2        System.out.println("还原之后大小:" + ret2.length);        FileOutputStream fos = new FileOutputStream(writePath);//建立文件输出流fos        fos.write(ret2);//利用文件输出流写出ret2文件        fos.close();//关闭文件输出流           JOptionPane.showMessageDialog(null, "解压成功", "标题",JOptionPane.WARNING_MESSAGE);          }        catch(Exception e){
               System.out.println("不是压缩后的文件");        }      }   }  public  byte[] ungzips(byte[] data) throws Exception{
     ByteArrayInputStream bis = new ByteArrayInputStream(data);  GZIPInputStream gzip = new GZIPInputStream(bis);  byte[] buf = new byte[1024];   int num = -1;   ByteArrayOutputStream bos = new ByteArrayOutputStream();  while ((num = gzip.read(buf, 0, buf.length)) != -1){
            bos.write(buf, 0, num);    }     gzip.close();    bis.close();     byte[] ret = bos.toByteArray();        bos.flush();        bos.close();        return ret;    }   public  static byte[] gzips(byte[] data) throws Exception {
           ByteArrayOutputStream bos = new ByteArrayOutputStream();        GZIPOutputStream gzip = new GZIPOutputStream(bos);        gzip.write(data);        gzip.finish();        gzip.close();        byte[] ret = bos.toByteArray();        bos.close();        return ret;   }}

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