minhhieu

package HoangDuongMinhHieu;

import java.io.BufferedReader; import java.io.FileReader; import java.sql.Connection; import java.sql.Driver; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.util.ArrayList;

import On.Sach;

public class Main { private final static String Ten_file = "D:\javacoban\HoTenSV.txt"; public static void main(String[] args) { ArrayList<ThietBiCN> ds = new ArrayList<>();

    System.out.println("---------cau1--------");
    try {
        BufferedReader br = new BufferedReader(
                new FileReader(Ten_file));
        String line;
        while ((line=br.readLine())!= null) {
            System.out.println(line);
        }
        br.close();
    } catch (Exception e) {
        System.out.println("Loi: " + e.getMessage());
    }
    System.out.println("----------cau2----------");

    try {
        BufferedReader br = new BufferedReader(
                new FileReader(Ten_file));
        String line;
        while((line = br.readLine())!= null) {
            String[] a = line.split("\\|");
            if(a.length<5) {
                continue;
            }
            String loai=a[0].trim();
            String ma = a[1].trim();
            String ten = a[2].trim();
            int nam = Integer.parseInt(a[3].trim());
            String giaTri = a[4].trim();

            if(loai.equals("MT")) {
                MayTinh mt = new MayTinh(ma, ten, nam, giaTri);
                ds.add(mt);
            }
            else if(loai.equals("MC")) {
                MayChieu mc =new MayChieu(ma, ten, nam, giaTri);
                ds.add(mc);
            }
        }
        br.close();
    } catch (Exception e) {
        System.out.println("Loi: " + e.getMessage());
    }
    System.out.println("----------Danh sách Máy tính----------");
    for (ThietBiCN x : ds) {
        if ( x instanceof MayTinh) {
            x.hienthi();
        }
    }
    System.out.println("----------Danh sách Máy chiếu----------");
    for(ThietBiCN x : ds) {
        if(x instanceof MayChieu) {
            x.hienthi();
        }
    }
    System.out.println("----------Câu 3----------");
    String url= "jdbc:sqlserver://localhost:1433;databaseName=Thietbi;encrypt=false;";
    String user ="sa";
    String pass= "123";

    try {
        Connection conn= DriverManager.getConnection(url,user,pass);
        String qlMT = "insert into Maytinh ([Mã thiết bị],[Tên thiết bị],Năm,Ram) values (?,?,?,?)";
        String qlMC = "insert into MayChieu([Mã thiết bị],[Tên thiết bị],Năm,[Độ phân giải]) values (?,?,?,?)";

        PreparedStatement psMT= conn.prepareStatement(qlMT);
        PreparedStatement psMC= conn.prepareStatement(qlMC);

        for(ThietBiCN x : ds) {
            if(x instanceof MayTinh) {
                MayTinh mt = (MayTinh)x;
                psMT.setString(1, mt.getMaTB());
                psMT.setString(2, mt.getMaTB());
                psMT.setInt(3, mt.getNamTB());
                psMT.setString(4, mt.getRAM());

                psMT.executeUpdate();
            }
        }
        for(ThietBiCN x : ds) {
            if(x instanceof MayChieu) {
                MayChieu mc = (MayChieu)x;
                psMC.setString(1, mc.getMaTB());
                psMC.setString(2, mc.getTenTB());
                psMC.setInt(3, mc.getNamTB());
                psMC.setString(4, mc.getDoPG());

                psMC.executeUpdate();
            }
        }
        System.out.println("Đã lưu vào sql");
        psMC.close();
        psMT.close();
        conn.close();
    } catch (Exception e) {
        System.out.println("Lỗi " + e.getMessage());
    }
    System.out.println("\n----------Câu 4----------");

    int dem = 0;

    for (ThietBiCN x : ds) {

        if (x instanceof MayTinh) {

            MayTinh mt = (MayTinh) x;

            if (mt.getRAM().equals("16GB")) {
                dem++;
            }
        }
    }

    System.out.println("-------------------------");
    System.out.println("RAM        Số lượng");
    System.out.println("-------------------------");
    System.out.println("16GB       " + dem);
    System.out.println("-------------------------");
}

}