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本文介绍了 Spring Boot 集成支付宝支付 的完整实现方案，包括支付创建、异步通知处理、订单查询、退款、幂等性处理以及生产环境落地最佳实践。

1. 项目依赖配置

在 pom.xml 中添加必要依赖：

<dependencies> <!-- Spring Boot Web --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- 支付宝SDK --> <dependency> <groupId>com.alipay.sdk</groupId> <artifactId>alipay-sdk-java</artifactId> <version>4.35.79.ALL</version> </dependency> <!-- Lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies>

2. 支付宝配置类

@Configuration @ConfigurationProperties(prefix = "alipay") @Data public class AlipayConfig { private String appId; private String privateKey; private String publicKey; private String notifyUrl; private String returnUrl; private String signType = "RSA2"; private String charset = "UTF-8"; private String gatewayUrl; private String format = "json"; }

3. 支付服务类

@Service @Slf4j public class AlipayService { @Autowired private AlipayConfig alipayConfig; // 创建电脑网站支付 public String createPagePay(AlipayTradePagePayRequest request) { try { AlipayClient alipayClient = new DefaultAlipayClient( alipayConfig.getGatewayUrl(), alipayConfig.getAppId(), alipayConfig.getPrivateKey(), alipayConfig.getFormat(), alipayConfig.getCharset(), alipayConfig.getPublicKey(), alipayConfig.getSignType() ); AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest(); alipayRequest.setReturnUrl(alipayConfig.getReturnUrl()); alipayRequest.setNo