java springboot+maven 对接支付宝生成支付二维码；查看订单；取消订单；退款

支付宝提供了测试环境
支付宝沙箱：先登录开放平台 https://openhome.alipay.com/develop/manage

这边能拿到调用支付宝接口所需要的所有参数

代码部分：
首先引入依赖：

    <dependency>
        <groupId>com.alipay.sdk</groupId>
        <artifactId>alipay-sdk-java</artifactId>
        <version>4.35.37.ALL</version>
    </dependency>

这边统一整理到main方法里面

package org.example;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.domain.AlipayTradeRefundModel;
import com.alipay.api.request.AlipayTradePrecreateRequest;
import com.alipay.api.request.AlipayTradeQueryRequest;
import com.alipay.api.request.AlipayTradeRefundRequest;
import com.alipay.api.response.AlipayTradePrecreateResponse;
import com.alipay.api.response.AlipayTradeQueryResponse;
import com.alipay.api.response.AlipayTradeRefundResponse;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
public class Main {
    public static void main(String[] args) {

        getAliCodeurl();
    }
    //--------------------------支付宝-----------------------
    //需要的字段
    //支付宝请求的地址：https://openapi-sandbox.dl.alipaydev.com/gateway.do
    //(应用/小程序/公众号)appid：9021000140694217
    //商户mchid：2088721045400254
    //商户私钥：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
    //支付宝公钥：MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuw+rYJnRhkyGPr/VE9Znp8tgeVw5EFRQ3/38O6+fm31G9Yb3ewj2bRQ2WAk2uitX0tvMTqT33DUsSm2++Q0BjTT03Vst5atCjjI7Un4opMyIy0qgkNq6BaG0FqkXHZpCP0Pk7w6quQGG6qk75skH7ByqKZIXzhLiZyZy7/hv7+s52NVrwxwxuK9WpJmOzvH+QLDr5ZKdTyqDQH4IQa4hZGFfQhZ/ZCAGCixGQrV3/Ypx7Ig1eUG1kSvy4cn1JDvHbomdDKRdj8LNMXxBu6BvTtTklQfkDorilETXVv+AWuUfjExp7r0psAAOk+7hGZLklqfZ6l8rGhqky3YB/LfJswIDAQAB

    //--------------------------支付宝获取二维码url-----------------------
    //获取签证请求
    public static AlipayClient createAlipayClient(){
        String gataliUrl = "https://openapi-sandbox.dl.alipaydev.com/gateway.do";
        String appid = "9021000140694217";
        String mchid = "2088721045400254";
        String privateKey = "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";
        String publicKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuw+rYJnRhkyGPr/VE9Znp8tgeVw5EFRQ3/38O6+fm31G9Yb3ewj2bRQ2WAk2uitX0tvMTqT33DUsSm2++Q0BjTT03Vst5atCjjI7Un4opMyIy0qgkNq6BaG0FqkXHZpCP0Pk7w6quQGG6qk75skH7ByqKZIXzhLiZyZy7/hv7+s52NVrwxwxuK9WpJmOzvH+QLDr5ZKdTyqDQH4IQa4hZGFfQhZ/ZCAGCixGQrV3/Ypx7Ig1eUG1kSvy4cn1JDvHbomdDKRdj8LNMXxBu6BvTtTklQfkDorilETXVv+AWuUfjExp7r0psAAOk+7hGZLklqfZ6l8rGhqky3YB/LfJswIDAQAB";

        AlipayClient alipayClient = new DefaultAlipayClient(gataliUrl, appid,
                privateKey, "JSON", "UTF-8", publicKey
                , "RSA2");
        return alipayClient;
    }


    public static String getAliCodeurl(){
        AlipayClient alipayClient = createAlipayClient();
        //这段代码设置二维码url的失效时间，这边取的失效时间是  当前日期+2分钟
        LocalDateTime now = LocalDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime nowPlusTwoMinutes = now.plusMinutes(2);
        //失效时间
        String formattedNowPlusTwoMinutes = nowPlusTwoMinutes.format(formatter);
        AlipayTradePrecreateRequest request = new AlipayTradePrecreateRequest();
        //设置回调接口，可以填自己的接口地址，这边我传的空值(回调接口不太稳定，这边我用下面的主动请求ali接口，获取订单信息)
        request.setNotifyUrl("");
        //订单号   自己生成的 uuid
        String out_trade_no = "qwertasdfg";
        //金额
        String total_amount = "10";
        //subject body 商品描述之类的
        String subject = "iphone";
        String body = "iphone";
        request.setBizContent("{\"out_trade_no\":\"" + out_trade_no+ "\","
                + "\"total_amount\":\"" + total_amount + "\","
                + "\"subject\":\"" + subject + "\","
                + "\"body\":\"" + body + "\","
                + "\"time_expire\":\"" + formattedNowPlusTwoMinutes + "\","
                + "\"product_code\":\"FACE_TO_FACE_PAYMENT\"}");
        //获取的二维码连接
        String qrCode = "";

        // 执行请求，拿到响应的结果，返回给浏览器
        try {
            AlipayTradePrecreateResponse result = alipayClient.execute(request); // 调用SDK生成表单
            if (result.isSuccess()) {
                qrCode = result.getQrCode();
                System.out.println("二维码连接："+qrCode);
            } else {
                String resultdata = result.getBody();
                System.out.println("错误原因："+resultdata);
            }
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        return qrCode;
    }

    //--------------------------支付宝主动获取订单信息-----------------------
    public static Boolean isPaySuccess() throws AlipayApiException {
        AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
        //自己生成订单号
        String out_trade_no = "qwertasdfg";
        request.setBizContent("{" +
                "\"out_trade_no\":\"" + out_trade_no + "\"" +
                "}");
        AlipayClient alipayClient = createAlipayClient();
        AlipayTradeQueryResponse response = alipayClient.execute(request);
        if (response.isSuccess()) {
            System.out.println("调用成功");
            System.out.println(response.getBody());
            //返回结果是已经支付
            if ("TRADE_SUCCESS".equals(response.getTradeStatus())) {
                return true;
            }else {
                return false;
            }
        } else {
            System.out.println("调用失败");
            return false;
        }
    }

    //--------------------------支付宝关闭订单，这边就是让上面生成的支付地址失效-----------------------
    public static String colsePay() throws AlipayApiException {
        AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
        //自己生成订单号
        String out_trade_no = "qwertasdfg";
        request.setBizContent("{" +
                "\"out_trade_no\":\"" + out_trade_no + "\"" +
                "}");
        AlipayClient alipayClient = createAlipayClient();
        AlipayTradeQueryResponse response = alipayClient.execute(request);
        if (response.isSuccess()) {
            return "关闭订单成功";
        } else {
            return "关闭订单失败"+response.getSubCode();
        }
    }


    //--------------------------退款-----------------------
    public static String returnPay() throws AlipayApiException {
        AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
        //自己生成订单号
        String out_trade_no = "qwertasdfg";
        request.setBizContent("{" +
                "\"out_trade_no\":\"" + out_trade_no + "\"" +
                "}");
        AlipayClient alipayClient = createAlipayClient();
        AlipayTradeRefundRequest alipay_request = new AlipayTradeRefundRequest();
        AlipayTradeRefundModel model = new AlipayTradeRefundModel();
        //自己生成的订单号
        model.setOutTradeNo("qwertasdfg");
        //需要退款的金额
        model.setRefundAmount("10");
        model.setRefundReason("");
        alipay_request.setBizModel(model);
        AlipayTradeRefundResponse alipay_response = alipayClient.execute(alipay_request);
        if ("Y".equals(alipay_response.getFundChange())) {
            return "退款成功";
        } else {
            return "退款失败"+alipay_response.getSubMsg();
        }
    }

}

注意：主动获取订单状态的接口，只能获取到支付成功的状态，其他状态拿不到；我这边的getAliCodeurl的接口是获取了支付的链接，需要前端自己将这个链接转成二维码
正式环境对接注意！！！
1.申请商户号
2.申请appid
3.商户号和appid进行绑定
4.商户号开通当面付功能
5.设置对应的appid的密钥
如果是企业商户，登录开放平台的时候不要扫码登录，要不然拿不到权限