I) ZIP

1. Data Source (data-web.txt) -> Doc du lieu (FileInputStream) -> data ->  -> Nen (DeflaterOutputStream) -> Luu file (FileOutputStream) -> Des Data (data-web.dlf)

2. Data Source (data-web.txt) -> Doc du lieu (FileInputStream) -> Nen -> data -> Luu file (FileOutputStream) -> Des Data (data-web.dlf)

II) UpZip

1. Data Source (data-web.dlf) -> Doc du lieu (FileInputStream) -> Giai nen (InflaterInputStream) -> data tho -> Luu (FileOutputStream) -> original data

2. Data Source (data-web.dlf) -> Doc du lieu (FileInputStream) -> data nen -> Giai nen (InflaterOutputStream) -> Luu (FileOutputStream) -> original data

#Main.java

/*
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 * and open the template in the editor.
 */
package java2.lesson03;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterInputStream;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;

/**
 *
 * @author Diep.Tran
 */
public class Main {
    public static void main(String[] args) {
        //zipText();
        //zipFile();
        //zipFile2();
        upzipFile();
    }
    
    static void upzipFile() {
        FileInputStream fis = null;
        InflaterInputStream iis = null;
        FileOutputStream fos = null;
        
        try {
            fis = new FileInputStream("data-web.dfl");
            iis = new InflaterInputStream(fis);
            
            fos = new FileOutputStream("original-data-web.txt");
            
            int code;
            
            while((code = iis.read()) != -1) {
                fos.write(code);
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(fis != null) {
                try {
                    fis.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(iis != null) {
                try {
                    iis.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    
    static void zipFile2() {
        FileInputStream fis = null;
        FileOutputStream fos = null;
        DeflaterOutputStream dos = null;
        
        try {
            fis = new FileInputStream("data-web.txt");
            
            fos = new FileOutputStream("data-web2.dfl");
            dos = new DeflaterOutputStream(fos);
            
            int code;
            while((code = fis.read()) != -1) {
                dos.write(code);
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(fis != null) {
                try {
                    fis.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            
            if(dos != null) {
                try {
                    dos.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    
    static void zipFile() {
        FileInputStream fis = null;
        DeflaterInputStream dis = null;
        FileOutputStream fos = null;
        
        try {
            fis = new FileInputStream("data-web.txt");
            
            dis = new DeflaterInputStream(fis);
            
            fos = new FileOutputStream("data-web.dfl");
            
            int code;
            while((code = dis.read()) != -1) {
                fos.write(code);
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            if(fis != null) {
                try {
                    fis.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            
            if(dis != null) {
                try {
                    dis.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
            
            if(fos != null) {
                try {
                    fos.close();
                } catch (IOException ex) {
                    Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        }
    }
    
    static void zipText() {
        try {
            //Nen du lieu
            String str = "Tạo một lớp đối tượng book gồm các thuộc tính : tên sách, tác giả, giá bán, ngày xuất bản, nhà sản xuất.Tạo một lớp đối tượng book gồm các thuộc tính : tên sách, tác giả, giá bán, ngày xuất bản, nhà sản xuất.Tạo một lớp đối tượng book gồm các thuộc tính : tên sách, tác giả, giá bán, ngày xuất bản, nhà sản xuất.";
            System.out.println("Original Length: " + str.length());
            
            byte[] originalData = str.getBytes("utf8");
            Deflater deflater = new Deflater();
            
            deflater.setInput(originalData);
            deflater.finish();
            
            byte[] zipData = new byte[1000];
            int length = deflater.deflate(zipData);
            
            System.out.println("length: " + length);
            //String zipTxt = new String(zipData, 0, length);
            //System.out.println(zipTxt);
            
            //Giai nen du lieu
            Inflater inflater = new Inflater();
            inflater.setInput(zipData, 0, length);
            byte[] unzipData = new byte[1000];
            int unzipLength = inflater.inflate(unzipData);
            
            System.out.println("unzip length: " + unzipLength);
            String unzipTxt = new String(unzipData, 0, unzipLength);
            System.out.println(unzipTxt);
        } catch (UnsupportedEncodingException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        } catch (DataFormatException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    }
}