手把手教你如何对接支付宝支付接口（奶爸级别）
·
步骤：
第一步：准备支付宝相关的参数，如appId、公私钥
第二步：写代码，搞起
第一步：
1.你需要登录支付宝https://open.alipay.com/platform/developerIndex.htm。
2.点击控制台—>研发服务
3.到这个地址上生成一对公私钥：https://miniu.alipay.com/keytool/create
4.私钥保存下来，是要放在项目配置里面的，公钥是下面的步骤要用到的。
5.复制上面的公钥，放到这个输入框里面
6.保存设置后，打开就可以看到这样的窗口，下面的【敲黑板了！！！支付宝公钥】是放在代码里面的，自己保存下来。
7.点击左边的【沙箱账号】，把账号密码保存下来，支付的时候要用到。
8.到了这一步，咱们所需要的配置基本上就准备齐了
请看配置
# 应用ID，您的APPID
alipay.appId=2021xxxx
# 支付宝公私钥生成地址：https://miniu.alipay.com/keytool/create
# 商户私钥，您的PKCS8格式RSA2私钥
alipay.merchantPrivateKey=第一次生成的私钥
# 支付宝公钥，查看地址：https://openhome.alipay.com/platform/keyManage.htm
alipay.alipayPublicKey=支付宝公钥
# 页面跳转异步通知页面路径，需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
alipay.notifyUrl=http://5ktbak.natappfree.cc/payment/alipay
# 页面跳转同步通知页面路径，需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
alipay.returnUrl=http://5ktbak.natappfree.cc/alipayResult
# 签名方式
alipay.signType=RSA2
# 字符编码格式
alipay.charset=utf-8
# 支付宝网关
alipay.gatewayUrl=https://openapi.alipaydev.com/gateway.do
第二步
alipay.properties
# 应用ID，您的APPID
alipay.appId=2021xxxx
# 支付宝公私钥生成地址：https://miniu.alipay.com/keytool/create
# 商户私钥，您的PKCS8格式RSA2私钥
alipay.merchantPrivateKey=第一次生成的私钥
# 支付宝公钥，查看地址：https://openhome.alipay.com/platform/keyManage.htm
alipay.alipayPublicKey=支付宝公钥
# 页面跳转异步通知页面路径，需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
alipay.notifyUrl=http://5ktbak.natappfree.cc/payment/alipay
# 页面跳转同步通知页面路径，需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
alipay.returnUrl=http://5ktbak.natappfree.cc/alipayResult
# 签名方式
alipay.signType=RSA2
# 字符编码格式
alipay.charset=utf-8
# 支付宝网关
alipay.gatewayUrl=https://openapi.alipaydev.com/gateway.do
AliPayResource.java
package com.alipay.resource;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
@Data
@Component
@ConfigurationProperties(prefix="alipay")
@PropertySource("classpath:alipay.properties")
public class AliPayResource {
private String appId;
private String merchantPrivateKey;
private String alipayPublicKey;
private String notifyUrl;
private String returnUrl;
private String signType;
private String charset;
private String gatewayUrl;
}
AlipayController.java
package com.alipay.controller;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.alipay.resource.AliPayResource;
import com.alipay.utils.DateUtil;
import com.alipay.utils.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* @author: HuGoldWater
* @description:
*/
@Slf4j
@RestController
@RequestMapping("payment")
public class AlipayController {
@Autowired
private AliPayResource aliPayResource;
/**
* 前往支付宝进行支付
*/
@GetMapping(value="/goAlipay")
public JsonResult goAlipay(String merchantUserId, String merchantOrderId) throws Exception{
//获得初始化的AlipayClient
AlipayClient alipayClient = new DefaultAlipayClient(aliPayResource.getGatewayUrl(),
aliPayResource.getAppId(),
aliPayResource.getMerchantPrivateKey(),
"json",
aliPayResource.getCharset(),
aliPayResource.getAlipayPublicKey(),
aliPayResource.getSignType());
//设置请求参数
AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
alipayRequest.setReturnUrl(aliPayResource.getReturnUrl());
alipayRequest.setNotifyUrl(aliPayResource.getNotifyUrl());
// 商户订单号, 商户网站订单系统中唯一订单号, 必填
String out_trade_no = merchantOrderId;
// 付款金额, 必填 单位元
String total_amount = "0.01"; // 测试用 1分钱
// 订单名称, 必填
String subject = "胡金水-付款用户[" + merchantUserId + "]";
// 商品描述, 可空, 目前先用订单名称
String body = subject;
// 该笔订单允许的最晚付款时间，逾期将关闭交易。取值范围：1m～15d。m-分钟，h-小时，d-天，1c-当天（1c-当天的情况下，无论交易何时创建，都在0点关闭）。 该参数数值不接受小数点， 如 1.5h，可转换为 90m。
String timeout_express = "1h";
alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
+ "\"total_amount\":\""+ total_amount +"\","
+ "\"subject\":\""+ subject +"\","
+ "\"body\":\""+ body +"\","
+ "\"timeout_express\":\""+ timeout_express +"\","
+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
//请求
String alipayForm = "";
try {
alipayForm = alipayClient.pageExecute(alipayRequest).getBody();
} catch (AlipayApiException e) {
e.printStackTrace();
}
log.info("支付宝支付 - 前往支付页面, alipayForm: \n{}", alipayForm);
return JsonResult.ok(alipayForm);
}
/**
* 支付成功后的支付宝异步通知
*/
@RequestMapping(value="/alipay")
public String alipay(HttpServletRequest request, HttpServletResponse response) throws Exception {
log.info("支付成功后的支付宝异步通知");
//获取支付宝POST过来反馈信息
Map<String,String> params = new HashMap<String,String>();
Map<String,String[]> requestParams = request.getParameterMap();
for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
String name = (String) iter.next();
String[] values = (String[]) requestParams.get(name);
String valueStr = "";
for (int i = 0; i < values.length; i++) {
valueStr = (i == values.length - 1) ? valueStr + values[i]
: valueStr + values[i] + ",";
}
//乱码解决，这段代码在出现乱码时使用
// valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
params.put(name, valueStr);
}
boolean signVerified = AlipaySignature.rsaCheckV1(params,
aliPayResource.getAlipayPublicKey(),
aliPayResource.getCharset(),
aliPayResource.getSignType()); //调用SDK验证签名
if(signVerified) {//验证成功
// 商户订单号
String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
// 支付宝交易号
String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");
// 交易状态
String trade_status = new String(request.getParameter("trade_status").getBytes("ISO-8859-1"),"UTF-8");
// 付款金额
String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
if (trade_status.equals("TRADE_SUCCESS")){
// String merchantReturnUrl = paymentOrderService.updateOrderPaid(out_trade_no, CurrencyUtils.getYuan2Fen(total_amount));
// notifyFoodieShop(out_trade_no,merchantReturnUrl);
}
log.info("************* 支付成功(支付宝异步通知) - 时间: {} *************", DateUtil.getCurrentDateString(DateUtil.DATETIME_PATTERN));
log.info("* 订单号: {}", out_trade_no);
log.info("* 支付宝交易号: {}", trade_no);
log.info("* 实付金额: {}", total_amount);
log.info("* 交易状态: {}", trade_status);
log.info("*****************************************************************************");
return "success";
}else {
//验证失败
log.info("验签失败, 时间: {}", DateUtil.getCurrentDateString(DateUtil.DATETIME_PATTERN));
return "fail";
}
}
}
Application.java
package com.alipay;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
运行Application，在页面输入localhost:9090/payment/goAlipay?merchantUserId=123456&merchantOrderId=654321
结果如下：
五月 08, 2021 11:30:51 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring DispatcherServlet 'dispatcherServlet'
INFO DispatcherServlet:525 - Initializing Servlet 'dispatcherServlet'
INFO DispatcherServlet:547 - Completed initialization in 3 ms
INFO AlipayController:80 - 支付宝支付 - 前往支付页面, alipayForm:
<form name="punchout_form" method="post" action="https://openapi.alipaydev.com/gateway.do?charset=utf-8&method=alipay.trade.page.pay&sign=0G7TbOfYZn8BS1dYY%2FITfZLBHgz%2F0uBz3XU4ndiw%2Fpd%2BADurlNMtYNugvZpGTjrL4JBJb%2Fgzl6vG%2B9urFCbeLiVDXhnGMIvqzXOY67YVGIMfIDxR%2BOytOzZ3zctPeEVHDZBAjRNy4aOqW1elJ491Q%2BptPNT2X3vy8Qts0Ago1HaOyoCRlFag5nB3fwD5t3NQz4ZCEG8slwERixJnN2sIQLj4NGI2bM2T6x8ayDtehRC89hwXJ1ZY9IyLVkwhby%2BW4HU2LiQ%2BqD%2FOKLmxsC65M5pWNF7vw9uswmEuN5qBswJ5rqlTl6iyYd5EKK2Xqhj6hCQYz0IMR1cymRhqDoPG1Q%3D%3D&return_url=http%3A%2F%2F5ktbak.natappfree.cc%2FalipayResult¬ify_url=http%3A%2F%2F5ktbak.natappfree.cc%2Fpayment%2Falipay&version=1.0&app_id=2021000117651511&sign_type=RSA2×tamp=2021-05-08+23%3A30%3A51&alipay_sdk=alipay-sdk-java-3.7.110.ALL&format=json">
<input type="hidden" name="biz_content" value="{"out_trade_no":"654321","total_amount":"0.01","subject":"胡金水-付款用户[123456]","body":"胡金水-付款用户[123456]","timeout_express":"1h","product_code":"FAST_INSTANT_TRADE_PAY"}">
<input type="submit" value="立即支付" style="display:none" >
</form>
<script>document.forms[0].submit();</script>
把上面的html代码放到html文件中：
<form name="punchout_form" method="post" action="https://openapi.alipaydev.com/gateway.do?charset=utf-8&method=alipay.trade.page.pay&sign=0G7TbOfYZn8BS1dYY%2FITfZLBHgz%2F0uBz3XU4ndiw%2Fpd%2BADurlNMtYNugvZpGTjrL4JBJb%2Fgzl6vG%2B9urFCbeLiVDXhnGMIvqzXOY67YVGIMfIDxR%2BOytOzZ3zctPeEVHDZBAjRNy4aOqW1elJ491Q%2BptPNT2X3vy8Qts0Ago1HaOyoCRlFag5nB3fwD5t3NQz4ZCEG8slwERixJnN2sIQLj4NGI2bM2T6x8ayDtehRC89hwXJ1ZY9IyLVkwhby%2BW4HU2LiQ%2BqD%2FOKLmxsC65M5pWNF7vw9uswmEuN5qBswJ5rqlTl6iyYd5EKK2Xqhj6hCQYz0IMR1cymRhqDoPG1Q%3D%3D&return_url=http%3A%2F%2F5ktbak.natappfree.cc%2FalipayResult¬ify_url=http%3A%2F%2F5ktbak.natappfree.cc%2Fpayment%2Falipay&version=1.0&app_id=2021000117651511&sign_type=RSA2×tamp=2021-05-08+23%3A30%3A51&alipay_sdk=alipay-sdk-java-3.7.110.ALL&format=json">
<input type="hidden" name="biz_content" value="{"out_trade_no":"654321","total_amount":"0.01","subject":"胡金水-付款用户[123456]","body":"胡金水-付款用户[123456]","timeout_express":"1h","product_code":"FAST_INSTANT_TRADE_PAY"}">
<input type="submit" value="立即支付" style="display:none" >
</form>
<script>document.forms[0].submit();</script>
打开html文件后,会进入这个页面：
输入沙箱的账号密码：
输入密码后，就已经付款完成了，控制台会打印支付成功的回调通知。
INFO AlipayController:91 - 支付成功后的支付宝异步通知
INFO AlipayController:129 - ************* 支付成功(支付宝异步通知) - 时间: 2021-05-09 00:09:32 *************
INFO AlipayController:130 - * 订单号: 123123123123
INFO AlipayController:131 - * 支付宝交易号: 2021050922001489970501658602
INFO AlipayController:132 - * 实付金额: 0.01
INFO AlipayController:133 - * 交易状态: TRADE_SUCCESS
INFO AlipayController:134 - *****************************************************************************
如何让支付宝将付款成功的通知，回调到你本机，我使用的是内网穿透：Natapp，可以看到另一篇文章：https://blog.csdn.net/qq_17555933/article/details/116549415
源码地址：
链接: https://pan.baidu.com/s/1cgNiqa5gZoJcaHlikqm_XA 提取码: 16f7
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