坦克大战（一期）-设计模式-坦克大战子弹发射用策略模式

resources/config.properties

@@ -3,4 +3,8 @@ initTankCount=10
 tankSpeed=5
 bulletSpeed=10
 gameWidth=1080
-gameHeight=720
+gameHeight=720
+
+#fireStrategy
+goodFS=com.msb.FourFireStrategy
+badFS=com.msb.DefaultFireStrategy

src/com/msb/Bullet.java

@@ -31,6 +31,8 @@ public class Bullet {
         rectangle.x = this.y;
         rectangle.width = WIDTH;
         rectangle.height = HEIGHT;
+
+        tankFrame.bullets.add(this);
     }
 
     public void paint(Graphics g) {

src/com/msb/DefaultFireStrategy.java

@@ -0,0 +1,22 @@
+package com.msb;/**
+ * @Author bingor
+ * @Date 2022/10/8 11:21
+ * @Description: com.msb
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName DefaultFireStrategy
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/8 11:21
+ *@Version 3.0
+ */
+public class DefaultFireStrategy implements FireStrategy {
+    @Override
+    public void fire(Tank tank) {
+        int bX = tank.getX() + Tank.WIDTH/2 - Bullet.WIDTH/2;
+        int bY = tank.getY()+Tank.HEIGHT/2-Bullet.HEIGHT/2;
+        new Bullet(bX, bY, tank.getDir(), tank.getGroup(), tank.getTankFrame());
+    }
+}

src/com/msb/FireStrategy.java

@@ -0,0 +1,11 @@
+package com.msb;
+
+/**
+ * @Author bingor
+ * @Date 2022/10/8 11:21
+ * @Description: com.msb
+ * @Version: 1.0
+ */
+public interface FireStrategy {
+    public void fire(Tank tank);
+}

src/com/msb/FourFireStrategy.java

@@ -0,0 +1,24 @@
+package com.msb;/**
+ * @Author bingor
+ * @Date 2022/10/8 11:21
+ * @Description: com.msb
+ * @Version: 1.0
+ */
+
+/**
+ *@ClassName DefaultFireStrategy
+ *@Description TODO
+ *@Author bingor
+ *@Date 2022/10/8 11:21
+ *@Version 3.0
+ */
+public class FourFireStrategy implements FireStrategy {
+    @Override
+    public void fire(Tank tank) {
+        int bX = tank.getX() + Tank.WIDTH/2 - Bullet.WIDTH/2;
+        int bY = tank.getY()+Tank.HEIGHT/2-Bullet.HEIGHT/2;
+        for (DirEnum value : DirEnum.values()) {
+            new Bullet(bX, bY, value, tank.getGroup(), tank.getTankFrame());
+        }
+    }
+}

src/com/msb/Tank.java

@@ -23,6 +23,7 @@ public class Tank {
     private Random random = new Random();
     private GroupEnum group = GroupEnum.BAD;
     private Rectangle rectangle = new Rectangle();
+    private FireStrategy fireStrategy;
 
     public Tank(int x, int y, DirEnum dir, GroupEnum group, TankFrame tankFrame) {
         this.x = x;
@@ -35,6 +36,20 @@ public class Tank {
         rectangle.x = this.y;
         rectangle.width = WIDTH;
         rectangle.height = HEIGHT;
+
+        try {
+            if(group == GroupEnum.GOOD) {
+                fireStrategy = (FireStrategy) Class.forName(PropertyMgr.getString("goodFS")).newInstance();
+            } else {
+                fireStrategy = (FireStrategy) Class.forName(PropertyMgr.getString("badFS")).newInstance();
+            }
+        } catch (InstantiationException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
     }
 
     public void paint(Graphics g) {
@@ -96,9 +111,10 @@ public class Tank {
 
     public void fire() {
         //子弹在坦克每个方向上的中心点应该是不一样的. TODO
-        int bX = this.x + WIDTH/2 - Bullet.WIDTH/2;
+        /*int bX = this.x + WIDTH/2 - Bullet.WIDTH/2;
         int bY = this.y+HEIGHT/2-Bullet.HEIGHT/2;
-        tankFrame.bullets.add(new Bullet(bX, bY, this.dir, this.group, tankFrame));
+        tankFrame.bullets.add(new Bullet(bX, bY, this.dir, this.group, tankFrame));*/   //换成策略模式
+        fireStrategy.fire(this);
     }
 
     public void boundsCheck() {
@@ -131,4 +147,7 @@ public class Tank {
         return rectangle;
     }
 
+    public TankFrame getTankFrame() {
+        return tankFrame;
+    }
 }