Java实现飞机大战-连接数据库并把得分写入数据库

编写飞行物类

package com.tarena.shoot;

import java.awt.image.BufferedImage;

/**
* 飞行物(敌机，蜜蜂， * ，英雄机)
*/
public abstract class FlyingObject {
protected int x;
protected int y;
protected int width;
protected int height;
protected BufferedImage image;
protected BufferedImage[] ember;

public int getX() {
return x;
}

public void setX(int x) {
this.x = x;
}

public int getY() {
return y;
}

public void setY(int y) {
this.y = y;
}

public int getWidth() {
return width;
}

public void setWidth(int width) {
this.width = width;
}

public int getHeight() {
return height;
}

public void setHeight(int height) {
this.height = height;
}

public BufferedImage getImage() {
return image;
}

public void setImage(BufferedImage image) {
this.image = image;
}

/**
* 检查是否出界
* @param width 边界宽
* @param height 边界高
* @return true 出界与否
*/
public abstract boolean outOfBounds();

/**
* 飞行物移动一步
*/
public abstract void step();

/**
* 检查当前飞行物体是否被 * (x,y)击(shoot)中，
* true表示击中，飞行物可以被击中
* @param Bullet * 对象
* @return true表示被击中了
*/
public boolean shootBy(Bullet bullet){
if(bullet.isBomb()){
return false;
}
int x = bullet.x; // * 横坐标
int y = bullet.y; // * 纵坐标
boolean shoot = this.x<x && x<this.x+width && this.y<y && y<this.y+height;
if(shoot){
bullet.setBomb(true);
}
return shoot;
}

}

编写飞机类

package com.tarena.shoot;

/**
* 敌飞机: 是飞行物，也是敌人
*/
public class Airplane extends FlyingObject implements Enemy {

int speed = 2; //移动步骤

public Airplane(){
this.image = ShootGame.airplane;
this.ember = ShootGame.airplaneEmber;
width = image.getWidth();
height = image.getHeight();
y = -height;  
x = (int)(Math.random()*(ShootGame.WIDTH - width));
}

@Override
public int getScore() { //获取分数
return 5;
}

@Override
public boolean outOfBounds() { //越界处理
return y>ShootGame.HEIGHT;
}

@Override
public void step() { //移动
y += speed;
}

}

编写奖励接口

package com.tarena.shoot;
/**
* 奖励
*/
public interface Award {
int DOUBLE_FIRE = 0; //双倍火力
int LIFE = 1;  //1条命
/** 获得奖励类型(上面的0或1) */
int getType();
}

编写蜜蜂类

package com.tarena.shoot;

import java.util.Random;

public class Bee extends FlyingObject implements Award{
private int xSpeed = 1;
private int ySpeed = 2;
private int awardType;

public Bee(){
this.image = ShootGame.bee;
this.ember = ShootGame.beeEmber;
width = image.getWidth();
height = image.getHeight();
y = -height;
Random rand = new Random();
x = rand.nextInt(ShootGame.WIDTH - width);
awardType = rand.nextInt(2);  //初始化时给奖励
}

public int getType(){
return awardType;
}

@Override
public boolean outOfBounds() {
return y>ShootGame.HEIGHT;
}

@Override
public void step() {   //可斜飞
x += xSpeed;
y += ySpeed;
if(x > ShootGame.WIDTH-width){
xSpeed = -1;
}
if(x < 0){
xSpeed = 1;
}
}
}

编写大飞机类

package com.tarena.shoot;

import java.util.Random;

public class BigPlane extends FlyingObject
implements Enemy, Award{
private int xSpeed=1;
private int ySpeed=1;

private int life;
private int awardType;

public BigPlane() {
life = 4;
this.image = ShootGame.bigPlane;
this.ember = ShootGame.bigPlaneEmber;
width = image.getWidth();
height = image.getHeight();
y = -height;    
Random rand = new Random();
x = rand.nextInt(ShootGame.WIDTH - width);
awardType = rand.nextInt(2);
}

public int getType() {
return awardType;
}

@Override
public int getScore() {
return 50;
}

@Override
public boolean outOfBounds() {
return false;
}

//@Override
//public BufferedImage getImage() {
//Graphics g = image.getGraphics();
//g.setColor(Color.white);
//g.fillRect(0, 0, 40, 30);
//g.setColor(Color.black);
//g.drawString("L:"+life, 10, 20);
//return image;
//}

public EnemyBullet[] shoot() { // 发射 *
int xStep = width / 4; // * 步分为飞机宽度4半
int yStep = 20;
EnemyBullet[] bullets2 = new EnemyBullet[1];
bullets2[0] = new EnemyBullet(x + 2 * xStep, y - yStep);
return bullets2;
}

@Override
public void step() {  //移动
x += xSpeed;
y += ySpeed;
if(x > ShootGame.WIDTH-width){
xSpeed = -1;
}
if(x < 0){
xSpeed = 1;
}
}

public boolean shootBy(Bullet bullet) {
if(super.shootBy(bullet)){
life--;
}
return life==0;
}
}

编写 * 类

package com.tarena.shoot;

/**
* * 类
*/
public class Bullet extends FlyingObject {
private int speed = 3; //移动的速度
private boolean bomb;
public Bullet(int x,int y){
this.x = x;
this.y = y;
this.image = ShootGame.bullet;
}

public void setBomb(boolean bomb) {
this.bomb = bomb;
}

public boolean isBomb() {
return bomb;
}

@Override
public void step(){  //移动方法
y-=speed;
}

@Override
public boolean outOfBounds() {
return y<-height;
}

}

编写飞机 * 效果

package com.tarena.shoot;

import java.awt.image.BufferedImage;

/**
* 灰烬 飞机被打掉以后的残影
* @author Robin
*/
public class Ember {
private BufferedImage[] images={};
private int index;
private int i;
private BufferedImage image;
private int intevel = 10;
private int x,y;
public Ember(FlyingObject object) {
images = object.ember;
image = object.image;
x = object.x;
y = object.y;
index = 0;
i = 0;
}

public boolean burnDown(){
i++;
if(i％intevel==0){
if(index == images.length){
return true;
}
image = images[index++];
}
return false;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
public BufferedImage getImage() {
return image;
}
}

编写敌人类

package com.tarena.shoot;

/**
* 敌人，可以有分数
*/
public interface Enemy {
//敌人的分数
int getScore();
}

编写敌机 * 类

package com.tarena.shoot;

public class EnemyBullet extends FlyingObject {
private int speed = 2; //移动的速度
private boolean bomb;

public EnemyBullet(int x,int y){
this.x = x;
this.y = y;
this.image = ShootGame.EnemyBullet;
}

public void setBomb(boolean bomb) {
this.bomb = bomb;
}

public boolean isBomb() {
return bomb;
}

@Override
public void step(){  //移动方法
y+=speed;
}

@Override
public boolean outOfBounds() {
return y<-height;
}

}

编写英雄机类

package com.tarena.shoot;

import java.awt.image.BufferedImage;

/**
* 英雄机
*
* @author Administrator
*
*/
public class Hero extends FlyingObject {

protected BufferedImage[] images = {};
protected int index = 0;

//private boolean doubleFire;
private int doubleFire;
private int life;

public Hero() {
life = 3;
doubleFire = 0;
this.image = ShootGame.hero0;
this.ember = ShootGame.heroEmber;
images = new BufferedImage[]{ShootGame.hero0, ShootGame.hero1};
width = image.getWidth();
height = image.getHeight();
x = 150;
y = 400;
}

public int isDoubleFire() {
return doubleFire;
}

public void addDoubleFire(){
doubleFire = 40;
}

public void setDoubleFire(int doubleFire) {
this.doubleFire = doubleFire;
}

public void addLife() { // 增命
life++;
}

public void subtractLife() { // 减命
life--;
}

public int getLife() {
return life;
}

/**
* 当前物体移动了一下，相对距离， x,y鼠标位置
*/
public void moveTo(int x, int y) {
this.x = x - width / 2;
this.y = y - height / 2;
}

@Override
public boolean outOfBounds() {
return x < 0 || x > ShootGame.WIDTH - width || y < 0
|| y > ShootGame.HEIGHT - height;
}

public Bullet[] shoot() { // 发射 *
int xStep = width / 4; // * 步分为飞机宽度4半
int yStep = 20;
if (doubleFire>0) {
Bullet[] bullets = new Bullet[2];
bullets[0] = new Bullet(x + xStep, y - yStep);
bullets[1] = new Bullet(x + 3 * xStep, y - yStep);
doubleFire -= 2;
return bullets;
} else { // 单倍
Bullet[] bullets = new Bullet[1];
bullets[0] = new Bullet(x + 2 * xStep, y - yStep); // y-yStep( * 距飞机的位置)
return bullets;
}
}

@Override
public void step() {
if(images.length>0){
image = images[index++/10％images.length];
}
}

public boolean hit(FlyingObject other) { // 碰撞算法

int x1 = other.x - this.width / 2;
int x2 = other.x + other.width + this.width / 2;
int y1 = other.y - this.height / 2;
int y2 = other.y + other.height + this.height / 2;
return this.x + this.width / 2 > x1 && this.x + this.width / 2 < x2
&& this.y + this.height / 2 > y1
&& this.y + this.width / 2 < y2;
}

public boolean hit2(EnemyBullet bb1) {
int x1 = bb1.x - this.width / 2;
int x2 = bb1.x + bb1.width + this.width / 2;
int y1 = bb1.y - this.height / 2;
int y2 = bb1.y + bb1.height + this.height / 2;
int hx = this.x + this.width / 2;
int hy = this.y + this.height / 2;
return hx > x1 && hx < x2 && hy > y1 && hy < y2;

}
}

编写bgm类

package com.tarena.shoot;

import java.applet.Applet;
import java.applet.AudioClip;
import java.io.File;
import java.net.URI;
import java.net.URL;
import javax.swing.JFrame;
public class Sound extends JFrame{
File f;
URI uri;
 URL url;

Sound(){
try {  
  f = new File("C:\\Users\\姜涛\\Desktop\\dddd\\StudioEIM - MapleStory.wav");
  uri = f.toURI();
  url = uri.toURL(); //解析地址
  AudioClip aau;
  aau = Applet.newAudioClip(url);
  aau.loop(); //循环播放
} catch (Exception e)
{ e.printStackTrace();
}
}
}

编写主类

package com.tarena.shoot;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.util.Arrays;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;

import DAO.DAO;

public class ShootGame extends JPanel {
public static final int WIDTH = 400; // 面板宽
public static final int HEIGHT = 654; // 面板高
/** 游戏的当前状态: START RUNNING PAUSE GAME_OVER */
private int state;
public static final int START = 0;
public static final int RUNNING = 1;
public static final int PAUSE = 2;
public static final int GAME_OVER = 3;

private int score = 0; // 得分
private Timer timer; // 定时器
private int intervel = 1000/100; // 时间间隔(毫秒)

public static BufferedImage background;
public static BufferedImage start;
public static BufferedImage pause;
public static BufferedImage gameover;
public static BufferedImage bullet;
public static BufferedImage airplane;
public static BufferedImage EnemyBullet;
public static BufferedImage[] airplaneEmber=new BufferedImage[4];
public static BufferedImage bee;
public static BufferedImage[] beeEmber=new BufferedImage[4];;
public static BufferedImage hero0;
public static BufferedImage hero1;
public static BufferedImage[] heroEmber=new BufferedImage[4];;
public static BufferedImage bigPlane;
public static BufferedImage[] bigPlaneEmber=new BufferedImage[4];;

private FlyingObject[] flyings = {}; // 敌机数组
private Bullet[] bullets = {}; // * 数组
private EnemyBullet[] bullets2 = {};//敌机 * 数组
private Hero hero = new Hero(); // 英雄机
private Ember[] embers = {}; // 灰烬
private BigPlane bigplane=new BigPlane();

static {// 静态代码块
try {
background = ImageIO.read(ShootGame.class
.getResource("background.png"));
bigPlane = ImageIO
.read(ShootGame.class.getResource("bigplane.png"));
airplane = ImageIO
.read(ShootGame.class.getResource("airplane.png"));
bee = ImageIO.read(ShootGame.class.getResource("bee.png"));
bullet = ImageIO.read(ShootGame.class.getResource("bullet.png"));
hero0 = ImageIO.read(ShootGame.class.getResource("hero0.png"));
hero1 = ImageIO.read(ShootGame.class.getResource("hero1.png"));
pause = ImageIO.read(ShootGame.class.getResource("pause.png"));
EnemyBullet= ImageIO.read(ShootGame.class.getResource("EnemyBullet.png"));
gameover = ImageIO
.read(ShootGame.class.getResource("gameover.png"));
start = ImageIO
.read(ShootGame.class.getResource("start.png"));
for(int i=0; i<4; i++){
beeEmber[i] = ImageIO.read(
ShootGame.class.getResource("bee_ember"+i+".png"));
airplaneEmber[i] = ImageIO.read(
ShootGame.class.getResource("airplane_ember"+i+".png"));
bigPlaneEmber[i] = ImageIO.read(
ShootGame.class.getResource("bigplane_ember"+i+".png"));
heroEmber[i] = ImageIO.read(
ShootGame.class.getResource("hero_ember"+i+".png"));
}
} catch (Exception e) {
e.printStackTrace();
}
}

@Override
public void paint(Graphics g) {
g.drawImage(background, 0, 0, null); // 画背景图
paintEmber(g);
paintHero(g); // 画英雄机
paintBullets(g); // 画 *
paintFlyingObjects(g); // 画飞行物
paintScore(g); // 画分数
paintState(g); // 画游戏状态
paintEnemyBullets(g);//画敌机 *
}

/** 画英雄机 */
public void paintHero(Graphics g) {
g.drawImage(hero.getImage(), hero.getX(), hero.getY(), null);
}

public void paintEmber(Graphics g) {
for (int i = 0; i < embers.length; i++) {
Ember e = embers[i];
g.drawImage(e.getImage(), e.getX(), e.getY(), null);
}
}

/** 画 * */
public void paintBullets(Graphics g) {
for (int i = 0; i < bullets.length; i++) {
Bullet b = bullets[i];
if(! b.isBomb())
g.drawImage(b.getImage(), b.getX() - b.getWidth() / 2, b.getY(),
null);
}

}
public void paintEnemyBullets(Graphics g) {
for(int i=0;i<bullets2.length;i++) {
EnemyBullet e=bullets2[i];
if(! e.isBomb()) {
g.drawImage(e.getImage(),e.getX() - e.getWidth() / 2, e.getY(),null);
}
}

}

/** 画飞行物 */
public void paintFlyingObjects(Graphics g) {
for (int i = 0; i < flyings.length; i++) {
FlyingObject f = flyings[i];
g.drawImage(f.getImage(), f.getX(), f.getY(), null);
}
}

/** 画分数 */
public void paintScore(Graphics g) {
int x = 10;
int y = 25;
Font font = new Font(Font.SANS_SERIF,Font.BOLD, 14);
g.setColor(new Color(0xFFFFFF));
g.setFont(font); // 设置字体
g.drawString("SCORE:" + score, x, y); // 画分数
y+=20;
g.drawString("LIFE:" + hero.getLife(), x, y);
}

/** 画游戏状态 */
public void paintState(Graphics g) {
switch (state) {
case START:
g.drawImage(start, 0, 0, null);
break;
case PAUSE:
g.drawImage(pause, 0, 0, null);
break;
case GAME_OVER:
g.drawImage(gameover, 0, 0, null);
break;
}
}

public static void main(String[] args) {
new Sound();
JFrame frame = new JFrame("Shoot Game");
ShootGame game = new ShootGame(); // 面板对象
frame.add(game); // 将面板添加到JFrame中
frame.setSize(WIDTH, HEIGHT); // 大小
frame.setAlwaysOnTop(true); // 其总在最上
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 默认关闭操作
frame.setIconImage(new ImageIcon("images/icon.jpg").getImage()); // 设置窗体的图标
frame.setLocationRelativeTo(null); // 设置窗体初始位置
frame.setVisible(true); // 尽快调用paint

game.action(); // 启动执行
}

public void action() { // 启动执行代码
// 鼠标监听事件
MouseAdapter l = new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent e) { // 鼠标移动
if (state == RUNNING) { // 运行时移动英雄机
int x = e.getX();
int y = e.getY();
hero.moveTo(x, y);
}
}

@Override
public void mouseEntered(MouseEvent e) { // 鼠标进入
if (state == PAUSE) { // 暂停时运行
state = RUNNING;
}
}

@Override
public void mouseExited(MouseEvent e) { // 鼠标退出
if (state != GAME_OVER) {
state = PAUSE; // 游戏未结束，则设置其为暂停
}
}

@Override
public void mouseClicked(MouseEvent e) { // 鼠标点击
switch (state) {
case START:
state = RUNNING;
break;
case GAME_OVER: // 游戏结束，清理现场
flyings = new FlyingObject[0];
bullets = new Bullet[0];
hero = new Hero();
score = 0;
state = START;
break;
}
}
};
this.addMouseListener(l); // 处理鼠标点击操作
this.addMouseMotionListener(l); // 处理鼠标滑动操作

timer = new Timer(); // 主流程控制
timer.schedule(new TimerTask() {
@Override
public void run() {
if (state == RUNNING) {
enterAction(); // 飞行物入场
stepAction(); // 走一步
shootAction(); // 射击
bangAction(); // * 打飞行物
outOfBoundsAction(); // 删除越界飞行物及 *
checkGameOverAction(); // 检查游戏结束
emberAction();
}
repaint(); // 重绘，调用paint()方法
}

}, intervel, intervel);
}

private void emberAction() {
Ember[] live = new Ember[embers.length];
int index = 0;
for (int i = 0; i < embers.length; i++) {
Ember ember = embers[i];
if(! ember.burnDown()){
live[index++]=ember;
}
}
embers = Arrays.copyOf(live, index);
}
int flyEnteredIndex = 0; // 飞行物入场计数

/** 飞行物入场 */
public void enterAction() {
flyEnteredIndex++;
if (flyEnteredIndex ％ 40 == 0) { // 300毫秒--10*30
FlyingObject obj = nextOne(); // 随机生成一个飞行物
flyings = Arrays.copyOf(flyings, flyings.length + 1);
flyings[flyings.length - 1] = obj;
}
}

public void stepAction() {
/** 飞行物走一步 */
for (int i = 0; i < flyings.length; i++) { // 飞行物走一步
FlyingObject f = flyings[i];
f.step();
}

/** * 走一步 */
for (int i = 0; i < bullets.length; i++) {
Bullet b = bullets[i];
b.step();
}

hero.step();

for (int i = 0; i < bullets2.length; i++) {
EnemyBullet c = bullets2[i];
c.step();
}

}

int shootIndex = 0; // 射击计数

/** 射击 */
public void shootAction() {
shootIndex++;
if (shootIndex ％ 30 == 0) { // 100毫秒发一颗
Bullet[] bs = hero.shoot(); // 英雄打出 *
bullets = Arrays.copyOf(bullets, bullets.length + bs.length); // 扩容
System.arraycopy(bs, 0, bullets, bullets.length - bs.length,bs.length); // 追加数组
}
if (shootIndex ％ 100 == 0) {// 大Boss发射 *
for (int i = 0; i < flyings.length; i++) {
if (flyings[i] instanceof BigPlane) {// 大Boss发射 *
BigPlane boss = (BigPlane) flyings[i];
EnemyBullet[] b = boss.shoot();
bullets2 = Arrays.copyOf(bullets2, bullets2.length + b.length);
System.arraycopy(b, 0, bullets2, bullets2.length - b.length, b.length);
}
}
}

}

//if (shootIndex ％ 30 == 0) { // 100毫秒发一颗
//
//EnemyBullet[] bs2 =big.shoot();
//bullets = Arrays.copyOf(bullets, bullets.length + bs2.length); // 扩容
//System.arraycopy(bs2, 0, bullets, bullets.length - bs2.length,
//bs2.length); // 追加数组
//}
//}
/** * 与飞行物碰撞检测 */
public void bangAction() {
for (int i = 0; i < bullets.length; i++) { // 遍历所有 *
Bullet b = bullets[i];
bang(b);
}
}

/** 删除越界飞行物及 * */
public void outOfBoundsAction() {
int index = 0;
FlyingObject[] flyingLives = new FlyingObject[flyings.length]; // 活着的飞行物
for (int i = 0; i < flyings.length; i++) {
FlyingObject f = flyings[i];
if (!f.outOfBounds()) {
flyingLives[index++] = f; // 不越界的留着
}
}
flyings = Arrays.copyOf(flyingLives, index); // 将不越界的飞行物都留着

index = 0; // 重置为0
Bullet[] bulletLives = new Bullet[bullets.length];
for (int i = 0; i < bullets.length; i++) {
Bullet b = bullets[i];
if (!b.outOfBounds()) {
bulletLives[index++] = b;
}
}
bullets = Arrays.copyOf(bulletLives, index); // 将不越界的 * 留着
}

/** 检查游戏结束 */
public void checkGameOverAction() {
if (isGameOver()) {
try {
DAO.save(score);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
state = GAME_OVER; // 改变状态
}
}

/** 检查游戏是否结束 */
public boolean isGameOver() {
int index = -1;

for (int i = 0; i < flyings.length; i++) {
FlyingObject obj = flyings[i];
if (hero.hit(obj)) { // 检查英雄机与飞行物是否碰撞
hero.subtractLife();
hero.setDoubleFire(0);
index = i;

Ember ember = new Ember(hero);
embers = Arrays.copyOf(embers, embers.length+1);
embers[embers.length-1]=ember;
}
}
if(index!=-1){
FlyingObject t = flyings[index];
flyings[index] = flyings[flyings.length-1];
flyings[flyings.length-1] = t;
flyings = Arrays.copyOf(flyings, flyings.length-1);

Ember ember = new Ember(t);
embers = Arrays.copyOf(embers, embers.length+1);
embers[embers.length-1]=ember;
}

for (int i = 0; i < bullets2.length; i++) {
EnemyBullet bb = bullets2[i]; // 获取每一个敌人对象
if (hero.hit2(bb)) { // 返回true,英雄机与敌人相撞了
hero.subtractLife(); // 英雄机减命
hero.setDoubleFire(0); // 英雄机火力值为0，单倍火力
// 碰撞后敌人的后果是消失
EnemyBullet bb1 = bullets2[i];
bullets2[i] = bullets2[bullets2.length - 1];
bullets2[bullets2.length - 1] = bb1;
bullets2 = Arrays.copyOf(bullets2, bullets2.length - 1);
}
}
return hero.getLife() <= 0;
}

/** * 和飞行物之间的碰撞检查 */
public void bang(Bullet bullet) {
int index = -1; // 击中的飞行物索引
for (int i = 0; i < flyings.length; i++) {
FlyingObject obj = flyings[i];
if (obj.shootBy(bullet)) { // 判断是否击中
index = i; // 记录被击中的飞行物的索引
break;
}
}
if (index != -1) { // 有击中的飞行物
FlyingObject one = flyings[index]; // 记录被击中的飞行物

FlyingObject temp = flyings[index]; // 被击中的飞行物与最后一个飞行物交换
flyings[index] = flyings[flyings.length - 1];
flyings[flyings.length - 1] = temp;

flyings = Arrays.copyOf(flyings, flyings.length - 1); // 删除最后一个飞行物(即被击中的)

// 检查one的类型 如果是敌人, 就算分
if (one instanceof Enemy) { // 检查类型，是敌人，则加分
Enemy e = (Enemy) one; // 强制类型转换
score += e.getScore(); // 加分
}

if (one instanceof Award) { // 若为奖励，设置奖励
Award a = (Award) one;
int type = a.getType(); // 获取奖励类型
switch (type) {
case Award.DOUBLE_FIRE:
hero.addDoubleFire(); // 设置双倍火力
break;
case Award.LIFE:
hero.addLife(); // 设置加命
break;
}
}

//飞行物变成灰烬
Ember ember = new Ember(one);
embers = Arrays.copyOf(embers, embers.length+1);
embers[embers.length-1]=ember;
}
}

/**
* 随机生成飞行物
*
* @return 飞行物对象
*/
public static FlyingObject nextOne() {
Random random = new Random();
int type = random.nextInt(20); // [0,4)
if (type==0) {
return new Bee();
}else if(type<=2){
return new BigPlane();
}else{
return new Airplane();
}
}
}

下面实现数据库的连接，首先编写将分数写入数据库的方法，在src重新建一个包，包里写写入分数的方法。

<code class="language-java">package DAO;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import util.DBUtil;

public class DAO {
/*
* 增加分数的方法
*/
public static void save(int score) throws Exception{
PreparedStatement ps=null;
Connection conn = null;
try{
conn = DBUtil.getConnection();
String sql ="INSERT INTO mydb2(score) values(?)";
ps = conn.prepareStatement(sql);
ps.setInt(1,score);
ps.executeUpdate();
}catch(SQLException e){
e.printStackTrace();
}finally{
DBUtil.close(conn);
}
}

}</code>

然后连接数据库

package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {
public static void main(String[]args) throws Exception{
Connection conn = DBUtil.getConnection();
System.out.println(conn);
DBUtil.close(conn);
}
public static void close(Connection conn){
try{
if(conn != null){
conn.close();
}
}catch(SQLException e){
e.printStackTrace();
}
}
public static Connection getConnection() throws Exception{
//System.out.println("112");
Connection conn = null;
//1.注册驱动（加载驱动）
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName=数据库名字","sa", "********");

//System.out.println("123");
//try{
//Class.forName("com.microsoft.sqlserver.jdbc.Driver");
//System.out.println("111");
////2.建立连接
//conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1443/mydb2","sa","the1012secret");
//System.out.println("111");
//}catch(ClassNotFoundException e){
////System.out.println("注册驱动");
//}catch(SQLException e){
//e.printStackTrace();
//}
return conn;
}
}

来源：https://blog.csdn.net/qq_41530545/article/details/81024279