实现责任链模式示例，添加经理类及相关方法，增强代码可读性

2026-01-04 16:19:02 +08:00
parent 9bb30b8bfb
commit feaa733595
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+/*
+实例：
+汤宝宝申请报销款，需要走产品经理、部门经理和总经理的审核~
+*/
+
+class Manager {
+    protected successor: Manager | null = null;
+    protected name: string;
+    protected amount: number = 0;
+
+    constructor(name: string) {
+        this.name = name;
+    }
+
+    setSuccessor(successor: Manager) {
+        this.successor = successor;
+        console.log(`${this.name}的下一级经理是${successor.name}`);
+    }
+
+    setAmountRight(amount: number) {
+        this.amount = amount;
+        console.log(`${this.name}的报销权限是${amount.toFixed(2)}元`);
+    }
+
+    haveRight(amount: number): boolean {
+        const right = amount <= this.amount;
+        if (right) {
+            console.log(`${this.name}有权限审批${amount.toFixed(2)}元的报销请求`);
+        } else {
+            console.log(`${this.name}没有权限审批${amount.toFixed(2)}元的报销请求`);
+        }
+        return right;
+    }
+
+    approve(name: string, amount: number) {
+        console.log(`${name}提交了一笔${amount.toFixed(2)}元的报销请求`);
+        if (this.haveRight(amount)) {
+            console.log(`${this.name}审批通过了${name}的报销请求，金额为${amount.toFixed(2)}元`);
+        } else if (this.successor) {
+            console.log(`${this.name}将${name}的报销请求上报给${this.successor.name}审批`);
+            this.successor.approve(name, amount);
+        } else {
+            console.log(`没有合适的经理审批${name}的报销请求，金额为${amount.toFixed(2)}元`);
+        }
+    }
+}
+
+(function(){
+    console.log("========= 责任链模式 =========");
+
+    // 创建经理
+    const pm = new Manager("产品经理");
+    pm.setAmountRight(1000);
+
+    const dm = new Manager("部门经理");
+    dm.setAmountRight(5000);
+
+    const gm = new Manager("总经理");
+    gm.setAmountRight(20000);
+
+    // 设置责任链
+    pm.setSuccessor(dm);
+    dm.setSuccessor(gm);
+
+    // 提交报销请求
+    console.log("-----");
+    pm.approve("汤宝宝", 800);
+    console.log("-----");
+    pm.approve("汤宝宝", 3000);
+    console.log("-----");
+    pm.approve("汤宝宝", 15000);
+    console.log("-----");
+    pm.approve("汤宝宝", 25000);
+
+    console.log("\n======= 责任链模式结束 =======");
+
+})();