<!--引入支付寶sdk -->
		<!-- https://mvnrepository.com/artifact/com.alipay.sdk/alipay-easysdk -->
		<dependency>
			<groupId>com.alipay.sdk</groupId>
			<artifactId>alipay-easysdk</artifactId>
			<version>2.2.2</version>
		</dependency>

spring:
  application:
    name:
      SpringBoot_Pay
alipay:
  appId: 9021000137619573
  appPrivateKey: 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
  publicKey: MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArEEt6BXEXKinvjjQooptYjjyJIy+4DHhxBK2BOMUWs2Ol9xQStPrkCz3gVwZg0yM1nIvv/G970u8siXL7GN42CbPEw3hVimCjiclDn1qMaurTakOUtUT0RygF118wThny40rZYsMbnDs7uCV4yynI8/5dEhHvUfe4pZm3by8Wy+aNjlX9Fwn1FbRa8aWnZmglcEp92xGkIyhC7Yc/DJA7J4xc44mgWVcHy8lNJv7Cznoehsq9dAew5mpjYvRCr1PIwGHw8D9Tkz/T1gOREiiejaBwF3zZpEUhq85t1GBoyPKwGtsb2Ve8ribP3EfKbqORgOc9ay7CnMkz8KRTRuK4wIDAQAB
# 回調函數(shù)的地址 http://localhost:8080/api/alipay/notify
#  要使用公網地址，用路由俠進行內網穿透
  notifyUrl: https://o4662e9430.vicp.fun/api/alipay/notify
  gatewayHost: openapi-sandbox.dl.alipaydev.com

package com.by.config;

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;

@Component
@ConfigurationProperties(prefix = "alipay")
@Data
public class AlipayConfig {
    // 應用Id

    private String appId;
    // 應用私鑰
    private String appPrivateKey;
    // 支付寶公鑰
    private String publicKey;
    // 回調接口路徑，要進行內網穿透
    private String notifyUrl;
    // 支付寶網關地址：配置文件中不要寫https://,會自動補全
    private String gatewayHost;


    @PostConstruct
    public void init(){
        Config config = new Config();
        // 基礎配置
        config.protocol = "https";
        config.gatewayHost = this.gatewayHost;// 支付寶網關地址
        config.signType = "RSA2";

        // 業(yè)務配置
        config.appId = this.appId;
        config.merchantPrivateKey = this.appPrivateKey;
        config.alipayPublicKey = this.publicKey;
        config.notifyUrl = this.notifyUrl;

        // 將配置信息， 添加到相應的工廠類
        Factory.setOptions(config);
        System.out.println("支付寶初始化配置完成");

    }

}

package com.by.controller;

import com.alipay.easysdk.factory.Factory;
import com.alipay.easysdk.payment.page.models.AlipayTradePagePayResponse;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

@RestController
@RequestMapping("/api/alipay")
public class PayController {

    /**
     * 訂單支付接口， 核心是調用支付寶的 Factory.Payment.Page().pay() 方法
     * @param subject  支付對象信息
     * @param outTradeNo  訂單號
     * @param totalAmount 訂單金額
     * @param returnUrl   支付成功以后返回的頁面地址
     * @return
     */
    @GetMapping
    public String pay(String subject, String outTradeNo, String totalAmount,String returnUrl) throws Exception {
        AlipayTradePagePayResponse response = Factory.Payment.Page().pay(subject, outTradeNo, totalAmount, returnUrl);
        String body = response.getBody();
        return body;
    }


    /**
     * 支付回調接口，如果支付成功，支付寶將會請求此接口，將成功信息返回
     */
    @PostMapping("/notify")
    public String notify(@RequestParam Map parameterMap) throws Exception {
        String tradeStatus = parameterMap.getOrDefault("trade_status","").toString();

        if (tradeStatus.trim().equals("TRADE_SUCCESS")) {
            // 驗證請求的有效性
            if (Factory.Payment.Common().verifyNotify(parameterMap)) {
                System.out.println("通過支付寶的驗證");
                System.out.println("訂單id：" + parameterMap.get("out_trade_no"));
            }else {
                System.out.println("支付驗證不通過");
            }
        }
        return "success";
    }

}

<body>
<a href="/api/alipay?subject=商品支付&outTradeNo=3123&totalAmount=16.8&returnUrl=http%3A%2F%2Flocalhost%3A8080%2Fpayok.html%3ForderId%3D1001" rel="external nofollow"  class="a">
    <img src="https://zhengxin-pub.bj.bcebos.com/logopic/a9936a369e82e0c6c42112674a5220e8_fullsize.jpg?x-bce-process=image/resize,m_lfit,w_200" alt="支付寶支付">
    <h2>支付寶支付</h2>
</a>
</body>

<div class="alert alert-primary" role="alert">
    支付成功
</div>