NetBeans數據庫筆記---三層架構
阿新 • • 發佈：2018-08-05
ima finally 如果 run from new option etc nds
1.創建數據庫，數據表
用MySQL數據庫和Navicat for MySQL工具創建表
2.創建實體類——反應表結構（列——變量）
也就是對應表建立的gets和sets方法,實體類的名字一般都與數據庫表的名字相同
3.創建數據訪問層。
1.BaseDAO（父類）代碼:
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";// 這裏apple是數據庫名
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(子類)（一個表一個dao類）
1.如果返回多條數據，對應ArrayList集合類型
2.方法的參數，是sql執行的條件where 有條件，傳參；where沒有條件，不用傳參
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.業務邏輯（省略）
5.表示層（前端頁面swing/jsp）
線程的代碼:
/*
* 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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
} else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
} else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
case 14:
if(num2>0){
jf.jguageNum.setText(Integer.toString(fenshu + 20 * num2));
JOptionPane.showMessageDialog(null, "恭喜，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
case 15:
if(num2>0){
jf.jguageNum.setText(Integer.toString(fenshu + 40 * num2));
JOptionPane.showMessageDialog(null, "恭喜，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
case 2:
if(num1>0){
jf.jguageNum.setText(Integer.toString(fenshu + 50 * num1));
JOptionPane.showMessageDialog(null, "恭喜，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
case 3:
if(num1>0){
jf.jguageNum.setText(Integer.toString(fenshu+100*num1));
JOptionPane.showMessageDialog(null, "恭喜，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
case 4:
if(num1>0){
jf.jguageNum.setText(Integer.toString(fenshu+25*num1));
JOptionPane.showMessageDialog(null, "恭喜，您運氣真好！", "提示", JOptionPane.INFORMATION_MESSAGE);
}else{
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "提示", JOptionPane.INFORMATION_MESSAGE);
}
break;
default:
JOptionPane.showMessageDialog(null, "繼續努力，謝謝", "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);
}
}
NetBeans數據庫筆記---三層架構