NetBeans数据库笔记---三层架构

1.创建数据库，数据表

用MySQL数据库和Navicat for MySQL工具创建表

2.创建实体类——反应表结构（列——变量）

也就是对应表建立的gets和sets方法,实体类的名字一般都与数据库表的名字相同

3.创建数据访问层。

1.BaseDAO（父类）代码:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
	protected Connection conn = null;
	protected PreparedStatement pst = null;
	protected ResultSet rs = null;
	private String Driver = "com.mysql.jdbc.Driver";
	private String url = "jdbc:mysql://localhost:3306/apple";// 这里apple是数据库名
	private String user = "root";
	private String password = "root";

	public void OpenConnection() throws ClassNotFoundException, SQLException {
		Class.forName(Driver);
		conn = DriverManager.getConnection(url, user, password);
	}
	public void CloseAll() throws SQLException {
		if (rs != null) {
			rs.close();
		}
		if (pst != null) {
			pst.close();
		}
		if (conn != null && conn.isClosed() == false) {
			conn.close();
		}
	}
}

2.XXXDAO(子类)（一个表一个dao类）

1.如果返回多条数据，对应ArrayList集合类型

2.方法的参数，是sql执行的条件where 有条件，传参；where没有条件，不用传参

public class LotForDAO extends ConnDAO{
    public int insert(LotInfor lot){
        int result=0;
     try {
        super.openConn();
        String sql="insert into LotInfor(lotType,lotNum1,lotNum2,lotNum3,lotNum4,lotNum5,lotNum6,lotNum7,lotTerm) values(?,?,?,?,?,?,?,?,?)";
        super.psm = super.conn.prepareStatement(sql);
        psm.setString(1, lot.getLotType());
        psm.setString(2, lot.getLotNum1());
        psm.setString(3, lot.getLotNum2());
        psm.setString(4, lot.getLotNum3());
        psm.setString(5, lot.getLotNum4());
        psm.setString(6, lot.getLotNum5());
        psm.setString(7, lot.getLotNum6());
        psm.setString(8, lot.getLotNum7());
        psm.setString(9, lot.getLotTerm());
        result=psm.executeUpdate();
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            try {
                super.closeConn();
            } catch (SQLException ex) {
                Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return result;
    }

    public int delete(String lotTerm){
        int result=0;
        try {
            super.openConn();
            String sql="delete from LotInfor where lotTerm=?";
            super.psm=super.conn.prepareStatement(sql);
            psm.setString(1, lotTerm);
            result=psm.executeUpdate();
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
        }finally{
            try {
                super.closeConn();
            } catch (SQLException ex) {
                Logger.getLogger(LotForDAO.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return result;
    }

}

4.业务逻辑（省略）

5.表示层（前端页面swing/jsp）

线程的代码:

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package apputil;

import appframe.JFrameMain;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;

/**
 *
 * @author wjw
 */
public class MyThread implements Runnable {

    JLabel[] arr;
    JButton jbu;
    JFrameMain jf;
    ImageIcon shan = new ImageIcon(this.getClass().getResource("../appimg/red2.gif"));
    ImageIcon jing = new ImageIcon(this.getClass().getResource("../appimg/red1.gif"));

    public MyThread(JLabel[] arr, JButton jbu,JFrameMain jf) {
        this.arr = arr;
        this.jbu = jbu;
        this.jf=jf;
    }

    public void run() {
        this.jbu.setEnabled(false);
        int random = (int) (Math.random() * 200) + 40;
        int sleep = 550;
        for (int i = 0; i <= random; i++) {
            arr[JFrameMain.index].setIcon(jing);
            if (JFrameMain.index >= 23) {
                JFrameMain.index = -1;
            }
            arr[JFrameMain.index + 1].setIcon(shan);
            JFrameMain.index = JFrameMain.index + 1;
            if (i < 10) {
                sleep = sleep - 50;
            }
            if (i + 10 > random) {
                sleep = sleep + 50;
            }
            try {
                Thread.sleep(sleep);
            } catch (InterruptedException ex) {
                Logger.getLogger(MyThread.class.getName()).log(Level.SEVERE, null, ex);
            }
        }

        int fenshu = Integer.parseInt(jf.jguageNum.getText());
        int num1 = Integer.parseInt(jf.jLabel36.getText());
        int num2 = Integer.parseInt(jf.jLabel37.getText());
        int num3 = Integer.parseInt(jf.jLabel38.getText());
        int num4 = Integer.parseInt(jf.jLabel39.getText());
        int num5 = Integer.parseInt(jf.jLabel48.getText());
        int num6 = Integer.parseInt(jf.jLabel49.getText());
        int num7 = Integer.parseInt(jf.jLabel50.getText());
        int num8 = Integer.parseInt(jf.jLabel51.getText());

        switch (JFrameMain.index) {
            case 5:
            case 10:
            case 16:
            case 22:
                if(num8>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 5 * num8));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 0:
            case 11:
            case 12:
                if(num7>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 10 * num7));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 6:
            case 17:
            case 18:
                if(num6>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 10 * num6));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
               } else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 1:
            case 13:
            case 23:
                if(num5>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 10 * num5));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
               } else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 7:
            case 8:
                if(num4>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 20 * num4));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 19:
            case 20:
                if(num3>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 20 * num3));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 14:
                if(num2>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 20 * num2));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 15:
                if(num2>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 40 * num2));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 2:
                if(num1>0){
                jf.jguageNum.setText(Integer.toString(fenshu + 50 * num1));
                JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 3:
                if(num1>0){
                 jf.jguageNum.setText(Integer.toString(fenshu+100*num1));
                 JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                 }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            case 4:
                if(num1>0){
                 jf.jguageNum.setText(Integer.toString(fenshu+25*num1));
                 JOptionPane.showMessageDialog(null, "恭喜，您运气真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
                }else{
                    JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);
                }
                break;
            default:
                JOptionPane.showMessageDialog(null, "继续努力，谢谢", "提示", JOptionPane.INFORMATION_MESSAGE);

        }
        this.jf.jLabel36.setText("0");
        this.jf.jLabel37.setText("0");
        this.jf.jLabel38.setText("0");
        this.jf.jLabel39.setText("0");
        this.jf.jLabel48.setText("0");
        this.jf.jLabel49.setText("0");
        this.jf.jLabel50.setText("0");
        this.jf.jLabel51.setText("0");
        this.jbu.setEnabled(true);
    }
}