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，子弹，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子弹(x,y)击(shoot)中，
	 * true表示击中，飞行物可以被击中
	 * @param Bullet 子弹对象
	 * @return true表示被击中了
	 */
	public boolean shootBy(Bullet bullet){
		if(bullet.isBomb()){
			return false;
		}
		int x = bullet.x; //子弹横坐标
		int y = bullet.y; //子弹纵坐标
		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() { // 发射子弹
		int xStep = width / 4; // 子弹步分为飞机宽度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;
	}
}

编写子弹类

package com.tarena.shoot;

/**
 * 子弹类
 */
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;
	}

}

编写飞机爆炸效果

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();
}

编写敌机子弹类

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() { // 发射子弹
		int xStep = width / 4; // 子弹步分为飞机宽度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(子弹距飞机的位置)
			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 = {}; // 子弹数组
	private EnemyBullet[] bullets2 = {};//敌机子弹数组
	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); // 画子弹
		paintFlyingObjects(g); // 画飞行物
		paintScore(g); // 画分数
		paintState(g); // 画游戏状态
		paintEnemyBullets(g);//画敌机子弹
	}

	/** 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);
		}
	}

	/** 画子弹 */
	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(); // 子弹打飞行物
					outOfBoundsAction(); // 删除越界飞行物及子弹
					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();
		}

		/** 子弹走一步 */
		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(); // 英雄打出子弹
			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发射子弹
			for (int i = 0; i < flyings.length; i++) {
				if (flyings[i] instanceof BigPlane) {// 大Boss发射子弹
					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
//		}
	//}
	/** 子弹与飞行物碰撞检测 */
	public void bangAction() {
		for (int i = 0; i < bullets.length; i++) { // 遍历所有子弹
			Bullet b = bullets[i];
			bang(b);
		}
	}

	/** 删除越界飞行物及子弹 */
	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); // 将不越界的子弹留着
	}

	/** 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;
	}

	/** 子弹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;
	}
}