支付宝沙箱服务（结合springboot实现，这里对接的是easy版本，工具用的是IDEA，WebStrom）

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一：打开支付宝开发平台，登录，然后点击控制台

https://open.alipay.com/

二：滚动到底部，选着沙箱服务

三：获取到对接要用的appId和公钥私钥

四：打开IDEA导入所需的xml文件

<!--        支付宝-->

        <!-- https://mvnrepository.com/artifact/com.alipay.sdk/alipay-easysdk -->

        <dependency>

            <groupId>com.alipay.sdk</groupId>

            <artifactId>alipay-easysdk</artifactId>

            <version>2.2.0</version>

        </dependency>

五：编写实体类：

import lombok.Data;

@Data

public class Alipay {

    private String traceNo;

    private String totalAmount;

    private String subject;

    private String alipayTraceNo;

}

六：编写yaml文件（这里的回调要用网络https服务，这里建议使用花生壳可以完成域名访问！）

  #支付宝配置

alipay:

  appId: ？

  #私钥

  appPrivateKey: ？

  #公钥

  alipayPublicKey: ？

  #回调地址

  notifyUrl: ？

七：编写服务类：

import com.alipay.easysdk.factory.Factory;

import com.alipay.easysdk.kernel.Config;

import lombok.Data;

import org.springframework.boot.context.properties.ConfigurationProperties;

import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

@Data

@Component

@ConfigurationProperties(prefix = "alipay")

public class AplipayConfig {

    private String appId;

    private String appPrivateKey;

    private String alipayPublicKey;

    private String notifyUrl;

    @PostConstruct

    public void init() {

        // 设置参数（全局只需设置一次）

        Config config = new Config();

        config.protocol = "https";

        config.gatewayHost = "openapi.alipaydev.com";

        config.signType = "RSA2";

        config.appId = this.appId;

        config.merchantPrivateKey = this.appPrivateKey;

        config.alipayPublicKey = this.alipayPublicKey;

        config.notifyUrl = this.notifyUrl;

        Factory.setOptions(config);

        System.out.println("=======支付宝SDK初始化成功=======");

    }

}

八：编写控制器（写完控制器建议直接测试访问看看可不可以访问的到，链接在第九步）

import com.alipay.easysdk.factory.Factory;

import com.alipay.easysdk.payment.page.models.AlipayTradePagePayResponse;

import com.rookie.sixthbackstage.entity.Alipay;

import com.rookie.sixthbackstage.entity.OrderItem;

import com.rookie.sixthbackstage.mapper.OrderItemMapper;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.PostMapping;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

import java.net.URLEncoder;

import java.util.HashMap;

import java.util.Map;

@RestController

@RequestMapping("/alipay")

public class AliPayController {

    @Autowired

    OrderItemMapper orderItemMapper;

    @GetMapping("/alipay") // &subject=xxx&traceNo=xxx&totalAmount=xxx

    public String pay(Alipay aliPay) {

        AlipayTradePagePayResponse response;

        try {

            //  发起API调用（以创建当面付收款二维码为例）

            response = Factory.Payment.Page()

                    .pay(URLEncoder.encode(aliPay.getSubject(), "UTF-8"), aliPay.getTraceNo(), aliPay.getTotalAmount(), "《这里放支付成功的地址！》");

        } catch (Exception e) {

            System.err.println("调用遭遇异常，原因：" + e.getMessage());

            throw new RuntimeException(e.getMessage(), e);

        }

        return response.getBody();

    }

    @PostMapping("/notify")  // 注意这里必须是POST接口

    public String payNotify(HttpServletRequest request) throws Exception {

        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) {

            System.out.println("=========支付宝异步回调========");

            Map<String, String> params = new HashMap<>();

            Map<String, String[]> requestParams = request.getParameterMap();

            for (String name : requestParams.keySet()) {

                params.put(name, request.getParameter(name));

                // System.out.println(name + " = " + request.getParameter(name));

            }

            int tradeNo = Integer.parseInt(params.get("out_trade_no"));

            String gmtPayment = params.get("gmt_payment");

            String alipayTradeNo = params.get("trade_no");

            double pay_price= Double.parseDouble(params.get("buyer_pay_amount"));

            // 支付宝验签

            if (Factory.Payment.Common().verifyNotify(params)) {

                // 验签通过

                System.out.println("交易名称: " + params.get("subject"));

                System.out.println("交易状态: " + params.get("trade_status"));

                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));

                System.out.println("商户订单号: " + params.get("out_trade_no"));

                System.out.println("交易金额: " + params.get("total_amount"));

                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));

                System.out.println("买家付款时间: " + params.get("gmt_payment"));

                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));

                // 支付成功后，修改自己的订单状态，这里的方法是我自己写的，根据自己实际情况来做更改

                OrderItem orderItem=new OrderItem(0,tradeNo,0,pay_price,gmtPayment,"","已支付");

                orderItemMapper.updateOrderItemById(orderItem);

            }

        }

        return "success";

    }

}

九：前端测试

 //http://localhost:8089/alipay/alipay?subject=asdflas&traceNo=123123&totalAmount=29999//链接，复制到浏览器试试看可不可以打开支付宝的页面

 //http://localhost:8089/alipay/alipay/asdflas/123123/29999//传数据，名称，订单号，价格，更多参数请参考官网的文档！

//结账按钮绑定的方法 
 gopay() {

            var url = localhost + "/alipay/alipay?subject=" + subject + "&traceNo=" + traceNo + "&totalAmount=" + totalAmount;

            location.href = url;

 },

十：结果