Java实现飞机大战-连接数据库并把得分写入数据库
作者：南乔代码Cool
这篇文章给大家分享了Java实现飞机大战中连接数据库并把得分写入数据库的相关知识点和代码，有兴趣的可以学习参考下。
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;
}
}