实现代理模式示例，添加火车站和代售点类，增强代码可读性

2026-01-02 18:18:06 +08:00
parent 232b926a97
commit 9bb30b8bfb
3 changed files with 191 additions and 0 deletions
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+/*
+实例：
+汤宝宝买火车票，可以去火车站买，也可以去代售点买，但是汤宝宝选择全都要。然而，火车站总共只剩两张票，这可苦了小明了。
+*/
+
+interface Seller {
+  sell(name: string): boolean;
+}
+
+class TrainStation implements Seller {
+    private stock: number;
+
+    constructor(stock: number) {
+        console.log(`火车站库存${stock}张票`);
+        this.stock = stock;
+    }
+
+    sell(name: string): boolean {
+        console.log(`${name}去火车站买票`);
+        if (this.stock > 0) {
+            this.stock--;
+            console.log(`${name}在火车站买到一张火车票。`);
+            return true;
+        }else {
+            console.log(`火车站没有票了, ${name}没买到票。`);
+            return false;
+        }
+    }
+}
+
+class TicketAgency implements Seller {
+    name: string;
+    private station: TrainStation;
+
+    constructor(name: string, station: TrainStation) {
+        this.name = name;
+        this.station = station;
+    }
+
+    sell(name: string): boolean {
+        console.log(`${name}去${this.name}买票`);
+        const result = this.station.sell(this.name);
+        if (result) {
+            console.log(`${name}在${this.name}买到一张火车票。`);
+            return true;
+        } else {
+            console.log(`${name}在${this.name}没买到票。`);
+            return false;
+        }
+    }
+}
+
+(function(){
+    console.log("============= 代理模式 =============");
+    const station = new TrainStation(2);
+    const agency = new TicketAgency("代售点A", station);
+    station.sell("汤宝宝");
+    agency.sell("汤宝宝");
+    console.log()
+    agency.sell("小明");
+    station.sell("小明");
+    console.log("\n=========== 代理模式结束 ===========");
+
+})()