feat(class23): 多态、继承、重载综合练习，引入lombok插件简化语法

- 新增 Card 类，包含基本的存款和消费功能- 添加 GoldCard 和 SilverCard 类，分别实现不同的优惠策略
- 编写 Test 类进行功能测试
- 在项目中集成 Lombok 依赖，简化代码

HM-JAVA.iml

@@ -7,5 +7,14 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library" scope="PROVIDED">
+      <library>
+        <CLASSES>
+          <root url="jar://$MAVEN_REPOSITORY$/org/projectlombok/lombok/1.18.34/lombok-1.18.34.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>

src/class23/Card.java

@@ -0,0 +1,27 @@
+package class23;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+// lombok 注解，简化类的 getter/setter/toString/equals/hashCode 方法
+// IDEA需启用注解处理器
+public class Card {
+    private String carID;
+    private String name;
+    private int phone;
+    private double money;
+    public void deposit(double money) {
+        this.money += money;
+    }
+    public void consume(double money) {
+        if(this.money >= money){
+            this.money -= money;
+        }else {
+            System.out.println("余额不足");
+        }
+    }
+}

src/class23/GoldCard.java

@@ -0,0 +1,26 @@
+package class23;
+
+public class GoldCard extends Card{
+    public GoldCard(String carID, String name, int phone, double money) {
+        super(carID, name, phone, money);
+    }
+    @Override
+    public void consume(double money){
+        System.out.println("您当前消费："+ money);
+        System.out.println("优惠后价格："+ money*0.8);
+        if (money<getMoney()){
+            setMoney(getMoney()-money*0.8);
+        } else {
+            System.out.println("余额不足");
+        }
+        if(money*0.8>=200){
+            printTicket();
+        }else {
+            System.out.println("您当前消费不满200，不能免费洗车！");
+        }
+
+    }
+    public void printTicket(){
+        System.out.println("您消费了，请打印洗车票");
+    }
+}

src/class23/SilverCard.java

@@ -0,0 +1,18 @@
+package class23;
+
+public class SilverCard extends Card{
+    public SilverCard(String carID, String name, int phone, double money) {
+        super(carID, name, phone, money);
+    }
+    @Override
+    public void consume(double money) {
+        System.out.println("您当前消费："+ money);
+        System.out.println("优惠后价格："+ money*0.9);
+        if (money<getMoney()){
+            setMoney(getMoney()-money*0.9);
+        } else {
+            System.out.println("余额不足");
+        }
+        System.out.println("当前余额："+ getMoney());
+    }
+}

src/class23/Test.java

@@ -0,0 +1,21 @@
+package class23;
+
+import java.util.Scanner;
+
+public class Test {
+    public static void main(String[] args) {
+        GoldCard goldCard = new GoldCard("123456", "张三", 123456789, 5000);
+        goldCard.deposit(1000);
+        pay(goldCard);
+
+        SilverCard silverCard = new SilverCard("654321", "李四", 123456789, 5000);
+        pay(silverCard);
+    }
+    public static void pay(Card c){
+        System.out.println("请刷卡，请输入您的消费金额：");
+        Scanner sc = new Scanner(System.in);
+        double money = sc.nextDouble();
+        c.consume(money);
+
+    }
+}