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            <header class="article-header">
                <h1 class="article-title">支付系统接入教程：从零开始</h1>
                <div class="article-meta">
                    发布时间：2024-03-17 | 阅读量：987
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            <div class="article-content">
                <h2>1. 接入前的准备工作</h2>
                <p>在开始接入支付系统之前，需要完成以下准备工作：</p>
                <ul>
                    <li>注册开发者账号</li>
                    <li>创建应用并获取API密钥</li>
                    <li>准备开发环境</li>
                    <li>阅读API文档</li>
                </ul>

                <h2>2. 支付接口对接</h2>
                <p>支付接口对接主要包括以下步骤：</p>
                <ul>
                    <li>统一下单接口</li>
                    <li>支付结果通知</li>
                    <li>订单查询接口</li>
                    <li>退款接口</li>
                </ul>

                <h2>3. 代码示例</h2>
                <p>以下是统一下单接口的示例代码：</p>
                <pre><code>// 统一下单接口示例
public class PaymentService {
    public String createOrder(OrderRequest request) {
        // 1. 参数校验
        validateParams(request);
        
        // 2. 生成订单号
        String orderNo = generateOrderNo();
        
        // 3. 调用支付接口
        PaymentResponse response = paymentClient.createOrder(
            orderNo,
            request.getAmount(),
            request.getSubject()
        );
        
        // 4. 处理响应结果
        if (response.isSuccess()) {
            return response.getPayUrl();
        } else {
            throw new PaymentException(response.getErrorMsg());
        }
    }
}</code></pre>

                <h2>4. 安全注意事项</h2>
                <p>在接入支付系统时，需要注意以下安全事项：</p>
                <ul>
                    <li>使用HTTPS协议</li>
                    <li>实现签名验证</li>
                    <li>做好参数加密</li>
                    <li>防止重复支付</li>
                    <li>做好日志记录</li>
                </ul>

                <h2>5. 测试与上线</h2>
                <p>完成开发后，需要进行以下测试：</p>
                <ul>
                    <li>功能测试：测试所有支付场景</li>
                    <li>性能测试：测试系统并发能力</li>
                    <li>安全测试：测试系统安全性</li>
                    <li>兼容性测试：测试不同环境下的表现</li>
                </ul>

                <h2>6. 常见问题解决</h2>
                <p>在接入过程中可能遇到的问题及解决方案：</p>
                <ul>
                    <li>签名验证失败：检查签名算法和密钥</li>
                    <li>支付超时：检查网络连接和超时设置</li>
                    <li>重复支付：实现订单幂等性处理</li>
                    <li>通知失败：实现通知重试机制</li>
                </ul>
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