Video hướng dẫn bài giảng

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package java2.lession3;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.DeflaterInputStream;

/**
 *
 * @author Diep.Tran
 */
public class Main {
    public static void main(String[] args) throws FileNotFoundException, IOException {
        //Thuc hien nen file data.txt
        String filename = "data.txt";
        //file data.txt => du lieu thuong => nen bang thu vien java
        //tao 1 connection doc du lieu tu file data.txt
        FileInputStream fis = new FileInputStream(filename);
        
        //thanh thu vien co nhiem vu gi
        //doc du lieu tu fis => chuyen sang dis => du lieu dau ra se dc nen luon
        DeflaterInputStream dis = new DeflaterInputStream(fis);
        
        //lu du lieu sau khi nen tu dis => sang file moi
        String zipFileName = "data.def";
        FileOutputStream fos = new FileOutputStream(zipFileName);
        
        //thuc hien qua trinh
        //doc du lieu tho (fis) -> nen boi dis => luu xuong file (fos)
        int code;
        while((code = dis.read()) != -1) {
            fos.write(code);
        }
        
        //xong qua trinh nen va luu file
        //dong ket noi
        fos.close();
        dis.close();
        fis.close();
        System.out.println("Ket thuc qua trinh nen file");
        
        //Co che cua doan code tren
        //File data (source ko nén => dùng bộ dọc dữ liệu (fis : FileInputStream)
        //=> Nén bởi thư viện dis : DeflaterInputStream -> lưu xuông file bởi thư viên
        //FileOutputStream
    }
}