SpringBoot整合支付宝（沙箱）

一、在SpringBoot项目中的pom.xml文件中加入

<dependency>
        <groupId>com.alipay.sdk</groupId>
        <artifactId>alipay-easysdk</artifactId>
        <version>2.2.0</version>
    </dependency>

    <dependency>
        <groupId>com.alipay.sdk</groupId>
        <artifactId>alipay-sdk-java</artifactId>
        <version>4.22.113.ALL</version>
    </dependency>

二、到支付宝开发平台去申请一个网页移动应用创建

三，申请成功之后，通过获得的appId、appPrivateKey、 alipayPublicKey来配置application.yml里面的，notifyUrl，涉及到内网渗透，需要到NATAPP-内网穿透 基于ngrok的国内高速内网映射工具natapp是基于ngrok的国内高速内网穿透专业服务商,独家彻底解决ngrok1.7内存泄漏问题.稳定拒绝掉线,适用于微信开发调试,本地架设演示服务器,外网可以访问,远程服务器,远程桌面,远程办公,游戏联机等https://natapp.cn/里面去创建一个账号，并购买一个免费隧道。

之后就是下载natapp，下载之后，解压打开natapp.exe。

打开之后，回到NATAPP-内网穿透 基于ngrok的国内高速内网映射工具修改本地端口号（也就是你的SpringBoot项目的端口号），并复制authtoken

复制好之后在已经打开的natapp里面输入natapp -authtoken=复制的token，就会得到notifyUrl。最后returnUrl就是你完成支付后所要跳转的页面，填的是你前端的一个地址。

alipay:
 appId: 
 appPrivateKey: 
 alipayPublicKey:
 notifyUrl:
 returnUrl: 

四、创建AliPayConfig.java

package com.test.comment;
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
//读取yml文件中alipay 开头的配置
@ConfigurationProperties(prefix = "alipay")
public class AliPayConfig {
    private String appId;
    private String appPrivateKey;
    private String alipayPublicKey;
    //异步通知回调地址（可选）
    private String notifyUrl;
    //支付成功后的回调地址
    private String returnUrl;


    @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=======");
    }
}

五、创建实体类AliPay.java

package com.test.vo;

import lombok.Data;

@Data
public class AliPay {
    private String traceNo;
    private double totalAmount;
    private String subject;
    private String alipayTraceNo;
}

六、创建AliPayController.java

package com.test.controller;

import com.alipay.easysdk.factory.Factory;
import com.test.comment.AliPayConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
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 com.test.vo.AliPay;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.time.LocalDateTime;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("alipay")
@Transactional(rollbackFor = Exception.class)
public class AliPayController {

    @Resource
    AliPayConfig aliPayConfig;



    private static final String GATEWAY_URL ="https://openapi-sandbox.dl.alipaydev.com/gateway.do";
    private static final String FORMAT ="JSON";
    private static final String CHARSET ="utf-8";
    private static final String SIGN_TYPE ="RSA2";

    @GetMapping("/pay") // 前端路径参数格式?subject=xxx&traceNo=xxx&totalAmount=xxx
    public void pay(AliPay aliPay, HttpServletResponse httpResponse) throws Exception {
        AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET, aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();
        request.setNotifyUrl(aliPayConfig.getNotifyUrl());
        request.setReturnUrl(aliPayConfig.getReturnUrl());
        request.setBizContent("{\"out_trade_no\":\"" + aliPay.getTraceNo() + "\","
                + "\"total_amount\":\"" + aliPay.getTotalAmount() + "\","
                + "\"subject\":\"" + aliPay.getSubject() + "\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        String form = "";
        try {
            // 调用SDK生成表单
            form = alipayClient.pageExecute(request).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        httpResponse.setContentType("text/html;charset=" + CHARSET);
        // 直接将完整的表单html输出到页面
        httpResponse.getWriter().write(form);
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();
    }

    @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));
            }

            String tradeNo = params.get("out_trade_no");
            String gmtPayment = params.get("gmt_payment");
            String alipayTradeNo = params.get("trade_no");
            // 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"));

                // 更新订单已支付的逻辑代码

            }
        }
        return "success";
    }

}

七、如果项目存在拦截器，需要添加

excludePathPatterns("/alipay/pay");

八、前端使用的Vue

      window.open("http://127.0.0.1:9090/alipay/pay?subject="+order.value.orderFlowersName+"&traceNo="+res.data.orderNumber+"&totalAmount="+order.value.orderMoney,'_self')

九、启动项目，测试