应用公钥需要使用支付宝第三方工具生成,最好在本地备份好，公钥以及配对的密钥
支付成功后支付宝需要回调咱们服务器的端口，必须保证自己的服务器能被外网访问
穿透教程
主要流程：
用户下单请求商户系统
商户系统构造支付请求，发送给支付宝
支付宝展示支付信息，用户支付支付宝回调给商户创建好的接口商户根据支付结果业务操作，并在最后将订单信息返回给用户
1、依赖导入
springboot thymeleaf alipa-sdk-java
2、创建请求公共参数的类 AlipayConfig
public class AlipayConfig {
// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号,开发时使用沙箱提供的APPID，生产环境改成自己的APPID
public static String APP_ID = "2016101600700789"; //沙箱的
//public static String APP_ID = "2019120669659570";
// 商户私钥，您的PKCS8格式RSA2私钥
public static String APP_PRIVATE_KEY = "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";
// public static String APP_PRIVATE_KEY ="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";
// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
public static String ALIPAY_PUBLIC_KEY="MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAkE5K/L+l166zCpgLZ5EQRf9f32lNII8xtIJzTiBJaRgYAb2HnW3ZAEnpLNeWl8s5PxWsa6tNtqlrjSG8smNHDmbgF9pF1pLjhbCoe1tMizeuUvX6wypnPH3k2dM5Z4ffyLyvXw8rqO28CUegNLnDtc7U6dq5YhSlntTph3DB5EKL6iNSCs8PtblKwAA108I5beV8lvV75QkkXMU1jdpbA013swBAptyLxTsb/NoUB4eUmjr+uwrhavHoWbolFID2v9MuZ0GYb7TpiBEQSns+VaHi7pJpYXsL+bwSoteKAD+cG2vH8NI5HggMn3eXH6hOFtZ5jsm4NOZ0WgKOjo38UwIDAQAB";
//public static String ALIPAY_PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhvCnEvUMjsa7N1CybrtIdMY74o1JVyspZqv5Q5yj/8uyaE5LSG+7hFhQZpkJgHFNdKJsICfEKpK95MoKAm9uOV4+p7R7i7FMjVKh8yX6bf4auQXQLa3KeTJ/GSQpw1Z+5cSivyzBb2v+d4dt9MgJj04j6cCo2g9wjYsQ/wpRn/BMdDtA7nUaKfa15gJLz4q/1MYlIjALjnMeXIJXqZdDvBLuQ3JMEAgv6jfFxbU6U71L6ayA1OFdc1RFUrz4SXryOk9Ogoz77/DWCF4fcCZenx/zsBhTUXbl5GDy6/KFeMoU2WkVhFC9N/kG5aAiUTihjHQI3w3APAGAbJZkFJg/iwIDAQAB";
// 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
public static String notify_url = "http://gojw.xyz/notify";
// 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(其实就是支付成功后返回的页面)
public static String return_url = "http://gojw.xyz/return";
// 签名方式
public static String sign_type = "RSA2";
// 字符编码格式
public static String CHARSET = "utf-8";
// 支付宝网关，
public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";
// 日志输出地方
public static String log_path = "C:\\";
//↑↑↑↑↑↑↑↑↑↑请在这里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
/**
* 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）
* @param sWord 要写入日志里的文本内容
*/
public static void logResult(String sWord) {
FileWriter writer = null;
try {
writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");
writer.write(sWord);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
3、支付控制层PayController
@Controller
public class PayController {
//获得初始化的AlipayClient
AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.APP_ID, AlipayConfig.APP_PRIVATE_KEY, "json", AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.sign_type);
@RequestMapping("/pay")
@ResponseBody
public String payController(String WIDout_trade_no,String WIDsubject,String WIDtotal_amount,String WIDbody) {//创建支付请求
//设置请求参数
AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
alipayRequest.setReturnUrl(AlipayConfig.return_url);
alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
//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 = WIDout_trade_no;
//付款金额，必填
String total_amount =WIDtotal_amount;
//订单名称，必填
String subject = WIDsubject;
//商品描述，可空
String body = WIDbody;
alipayRequest.setBizContent("{\"out_trade_no\":\"" + out_trade_no + "\","
+ "\"total_amount\":\"" + total_amount + "\","
+ "\"subject\":\"" + subject + "\","
+ "\"body\":\"" + body + "\","
+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
//请求
String form = "";
try {
form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单
} catch (AlipayApiException e) {
e.printStackTrace();
}
return form;
}
@ResponseBody
@RequestMapping("/dingdanLook")
public String dingdanChaxun(){//查看订单信息
//设置请求参数
AlipayTradeQueryRequest alipayTradeQueryRequest = new AlipayTradeQueryRequest();
alipayTradeQueryRequest.setBizContent("{" +
" \"out_trade_no\":\"201503s240440010101002\" " +//商户订单号
"}" );
String body="";
try {
body = alipayClient.execute(alipayTradeQueryRequest).getBody();
} catch (AlipayApiException e) {
e.printStackTrace();
}
return body;
}
@ResponseBody
@PostMapping("/notify") //异步验签接口
public String notifyer(HttpServletRequest request) throws AlipayApiException {
boolean b = mysignVerified(request);
if (b){
System.out.println("异步验签成功");
//修改数据库订单状态
return "success";
}else {
System.out.println("异步验签失败");
return "failure";
}
}
@GetMapping(value = "/return") //同步验签接口
public String returner(HttpServletRequest request) throws AlipayApiException {
boolean b = mysignVerified(request);
if (b){
System.out.println("同步验签成功-跳转到成功后页面");
//修改数据库订单状态
return "/success";
}else {
System.out.println("同步验签失败-跳转到充值页面让用户重新充值");
return "/error";
}
}
/*
* 验签方法
* */
public boolean mysignVerified(HttpServletRequest request) throws AlipayApiException {
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 = iter.next();
String[] values = 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。如果mysign和sign不相等也可以使用这段代码转化
// valueStr = new String(valueStr.getBytes("ISO-8859-1"), "gbk");
params.put(name, valueStr);
}
//String out_trade_no = request.getParameter("out_trade_no");// 商户订单号
return AlipaySignature.rsaCheckV1(params, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.CHARSET, AlipayConfig.sign_type); //调用SDK验证签名
}
@RequestMapping("/")
public String toTest(){
return "index";
}
}
4、前台页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/pay" method="post">
订单号：<input type="text" name="WIDout_trade_no" required><br/>
订单名称：<input type="text" name="WIDsubject" required><br/>
付款金额：<input type="text" name="WIDtotal_amount" required><br/>
WIDbody：<input type="text" name="WIDbody"><br/>
<input type="submit" value="下单"> <input type="reset" value="重置">
</form>
</body>
</html>