如何运用策略模式优化复杂的条件判断逻辑？

interface PaymentStrategy {
    void pay(BigDecimal amount);
}

class WeChatPay implements PaymentStrategy {
    public void pay(BigDecimal amount) {
        System.out.println("微信支付：" + amount);
    }
}

class AliPay implements PaymentStrategy {
    public void pay(BigDecimal amount) {
        System.out.println("支付宝支付：" + amount);
    }
}

class PaymentContext {
    private PaymentStrategy strategy;

    public PaymentContext(PaymentStrategy strategy) {
        this.strategy = strategy;
    }

    public void executePayment(BigDecimal amount) {
        strategy.pay(amount);
    }
}

// 根据用户选择动态切换策略
PaymentStrategy strategy = "wechat".equals(type) ? 
    new WeChatPay() : new AliPay();
PaymentContext context = new PaymentContext(strategy);
context.executePayment(new BigDecimal("100"));

class StrategyFactory {
    public static PaymentStrategy getStrategy(String type) {
        return switch (type) {
            case "wechat" -> new WeChatPay();
            case "alipay" -> new AliPay();
            default -> throw new IllegalArgumentException("不支持的支付方式");
        };
    }
}

PaymentStrategy strategy = StrategyFactory.getStrategy(userInput);
new PaymentContext(strategy).executePayment(amount);