苍穹外卖8.3

于 2025-04-26 20:46:56 发布
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分类专栏： 苍穹外卖 文章标签： java 开发语言
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本文链接：https://blog.youkuaiyun.com/ABCDEEE7/article/details/147542296

订单支付：

时序图：程序执行部的顺序

准备：

 /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
 
        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );
 
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }
 
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
 
        return vo;
    }
 
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
 
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
 
        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
 
        orderMapper.update(orders);
    }

package com.sky.utils;
 
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.properties.WeChatProperties;
import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
import org.apache.commons.lang.RandomStringUtils;
import org.apache.http.HttpHeaders;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.math.BigDecimal;
import java.security.PrivateKey;
import java.security.Signature;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
import java.util.List;
 
/**
 * 微信支付工具类
 */
@Component
public class WeChatPayUtil {
 
    //微信支付下单接口地址
    public static final String JSAPI = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
 
    //申请退款接口地址
    public static final String REFUNDS = "https://api.mch.weixin.qq.com/v3/refund/domestic/refunds";
 
    @Autowired
    private WeChatProperties weChatProperties;
 
    /**
     * 获取调用微信接口的客户端工具对象
     *
     * @return
     */
    private CloseableHttpClient getClient() {
        PrivateKey merchantPrivateKey = null;
        try {
            //merchantPrivateKey商户API私钥，如何加载商户API私钥请看常见问题
            merchantPrivateKey = PemUtil.loadPrivateKey(new FileInputStream(new File(weChatProperties.getPrivateKeyFilePath())));
            //加载平台证书文件
            X509Certificate x509Certificate = PemUtil.loadCertificate(new FileInputStream(new File(weChatProperties.getWeChatPayCertFilePath())));
            //wechatPayCertificates微信支付平台证书列表。你也可以使用后面章节提到的“定时更新平台证书功能”，而不需要关心平台证书的来龙去脉
            List<X509Certificate> wechatPayCertificates = Arrays.asList(x509Certificate);
 
            WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
                    .withMerchant(weChatProperties.getMchid(), weChatProperties.getMchSerialNo(), merchantPrivateKey)
                    .withWechatPay(wechatPayCertificates);
 
            // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签
            CloseableHttpClient httpClient = builder.build();
            return httpClient;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }
 
    /**
     * 发送post方式请求
     *
     * @param url
     * @param body
     * @return
     */
    private String post(String url, String body) throws Exception {
        CloseableHttpClient httpClient = getClient();
 
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader(HttpHeaders.ACCEPT, ContentType.APPLICATION_JSON.toString());
        httpPost.addHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
        httpPost.addHeader("Wechatpay-Serial", weChatProperties.getMchSerialNo());
        httpPost.setEntity(new StringEntity(body, "UTF-8"));
 
        CloseableHttpResponse response = httpClient.execute(httpPost);
        try {
            String bodyAsString = EntityUtils.toString(response.getEntity());
            return bodyAsString;
        } finally {
            httpClient.close();
            response.close();
        }
    }
 
    /**
     * 发送get方式请求
     *
     * @param url
     * @return
     */
    private String get(String url) throws Exception {
        CloseableHttpClient httpClient = getClient();
 
        HttpGet httpGet = new HttpGet(url);
        httpGet.addHeader(HttpHeaders.ACCEPT, ContentType.APPLICATION_JSON.toString());
        httpGet.addHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.toString());
        httpGet.addHeader("Wechatpay-Serial", weChatProperties.getMchSerialNo());
 
        CloseableHttpResponse response = httpClient.execute(httpGet);
        try {
            String bodyAsString = EntityUtils.toString(response.getEntity());
            return bodyAsString;
        } finally {
            httpClient.close();
            response.close();
        }
    }
 
    /**
     * jsapi下单
     *
     * @param orderNum    商户订单号
     * @param total       总金额
     * @param description 商品描述
     * @param openid      微信用户的openid
     * @return
     */
    private String jsapi(String orderNum, BigDecimal total, String description, String openid) throws Exception {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("appid", weChatProperties.getAppid());
        jsonObject.put("mchid", weChatProperties.getMchid());
        jsonObject.put("description", description);
        jsonObject.put("out_trade_no", orderNum);
        jsonObject.put("notify_url", weChatProperties.getNotifyUrl());
 
        JSONObject amount = new JSONObject();
        amount.put("total", total.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
        amount.put("currency", "CNY");
 
        jsonObject.put("amount", amount);
 
        JSONObject payer = new JSONObject();
        payer.put("openid", openid);
 
        jsonObject.put("payer", payer);
 
        String body = jsonObject.toJSONString();
        return post(JSAPI, body);
    }
 
    /**
     * 小程序支付
     *
     * @param orderNum    商户订单号
     * @param total       金额，单位 元
     * @param description 商品描述
     * @param openid      微信用户的openid
     * @return
     */
    public JSONObject pay(String orderNum, BigDecimal total, String description, String openid) throws Exception {
        //统一下单，生成预支付交易单
        String bodyAsString = jsapi(orderNum, total, description, openid);
        //解析返回结果
        JSONObject jsonObject = JSON.parseObject(bodyAsString);
        System.out.println(jsonObject);
 
        String prepayId = jsonObject.getString("prepay_id");
        if (prepayId != null) {
            String timeStamp = String.valueOf(System.currentTimeMillis() / 1000);
            String nonceStr = RandomStringUtils.randomNumeric(32);
            ArrayList<Object> list = new ArrayList<>();
            list.add(weChatProperties.getAppid());
            list.add(timeStamp);
            list.add(nonceStr);
            list.add("prepay_id=" + prepayId);
            //二次签名，调起支付需要重新签名
            StringBuilder stringBuilder = new StringBuilder();
            for (Object o : list) {
                stringBuilder.append(o).append("\n");
            }
            String signMessage = stringBuilder.toString();
            byte[] message = signMessage.getBytes();
 
            Signature signature = Signature.getInstance("SHA256withRSA");
            signature.initSign(PemUtil.loadPrivateKey(new FileInputStream(new File(weChatProperties.getPrivateKeyFilePath()))));
            signature.update(message);
            String packageSign = Base64.getEncoder().encodeToString(signature.sign());
 
            //构造数据给微信小程序，用于调起微信支付
            JSONObject jo = new JSONObject();
            jo.put("timeStamp", timeStamp);
            jo.put("nonceStr", nonceStr);
            jo.put("package", "prepay_id=" + prepayId);
            jo.put("signType", "RSA");
            jo.put("paySign", packageSign);
 
            return jo;
        }
        return jsonObject;
    }
 
    /**
     * 申请退款
     *
     * @param outTradeNo    商户订单号
     * @param outRefundNo   商户退款单号
     * @param refund        退款金额
     * @param total         原订单金额
     * @return
     */
    public String refund(String outTradeNo, String outRefundNo, BigDecimal refund, BigDecimal total) throws Exception {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("out_trade_no", outTradeNo);
        jsonObject.put("out_refund_no", outRefundNo);
 
        JSONObject amount = new JSONObject();
        amount.put("refund", refund.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
        amount.put("total", total.multiply(new BigDecimal(100)).setScale(2, BigDecimal.ROUND_HALF_UP).intValue());
        amount.put("currency", "CNY");
 
        jsonObject.put("amount", amount);
        jsonObject.put("notify_url", weChatProperties.getRefundNotifyUrl());
 
        String body = jsonObject.toJSONString();
 
        //调用申请退款接口
        return post(REFUNDS, body);
    }
}
 /**
     * 根据订单号查询订单
     * @param orderNumber
     */
    @Select("select * from orders where number = #{orderNumber}")
    Orders getByNumber(String orderNumber);
 
    /**
     * 修改订单信息
     * @param orders
     */
    void update(Orders orders);
    @Update("update orders set status = #{orderStatus},pay_status = #{orderPaidStatus},checkout_time = #{check_out_time} where id = #{id}")
    void updateStatus(Integer orderStatus, Integer orderPaidStatus, LocalDateTime check_out_time,Long id);
 <update id="update" parameterType="com.sky.entity.Orders">
        update orders
        <set>
            <if test="cancelReason != null and cancelReason!='' "> cancel_reason=#{cancelReason}, </if>
            <if test="rejectionReason != null and rejectionReason!='' "> rejection_reason=#{rejectionReason}, </if>
            <if test="cancelTime != null"> cancel_time=#{cancelTime}, </if>
            <if test="payStatus != null"> pay_status=#{payStatus}, </if>
            <if test="payMethod != null"> pay_method=#{payMethod}, </if>
            <if test="checkoutTime != null"> checkout_time=#{checkoutTime}, </if>
            <if test="status != null"> status = #{status}, </if>
            <if test="deliveryTime != null"> delivery_time = #{deliveryTime} </if>
        </set>
        where id = #{id}
    </update>

 

package com.sky.controller.nofity;
 
import com.alibaba.druid.support.json.JSONUtils;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.properties.WeChatProperties;
import com.sky.service.OrderService;
import com.wechat.pay.contrib.apache.httpclient.util.AesUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.entity.ContentType;
import org.springframework.beans.factory.annotation.Autowired;
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.io.BufferedReader;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
 
/**
 * 支付回调相关接口
 */
@RestController
@RequestMapping("/notify")
@Slf4j
public class PayNotifyController {
    @Autowired
    private OrderService orderService;
    @Autowired
    private WeChatProperties weChatProperties;
 
    /**
     * 支付成功回调
     *
     * @param request
     */
    @RequestMapping("/paySuccess")
    public void paySuccessNotify(HttpServletRequest request, HttpServletResponse response) throws Exception {
        //读取数据
        String body = readData(request);
        log.info("支付成功回调：{}", body);
 
        //数据解密
        String plainText = decryptData(body);
        log.info("解密后的文本：{}", plainText);
 
        JSONObject jsonObject = JSON.parseObject(plainText);
        String outTradeNo = jsonObject.getString("out_trade_no");//商户平台订单号
        String transactionId = jsonObject.getString("transaction_id");//微信支付交易号
 
        log.info("商户平台订单号：{}", outTradeNo);
        log.info("微信支付交易号：{}", transactionId);
 
        //业务处理，修改订单状态、来单提醒
        orderService.paySuccess(outTradeNo);
 
        //给微信响应
        responseToWeixin(response);
    }
 
    /**
     * 读取数据
     *
     * @param request
     * @return
     * @throws Exception
     */
    private String readData(HttpServletRequest request) throws Exception {
        BufferedReader reader = request.getReader();
        StringBuilder result = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            if (result.length() > 0) {
                result.append("\n");
            }
            result.append(line);
        }
        return result.toString();
    }
 
    /**
     * 数据解密
     *
     * @param body
     * @return
     * @throws Exception
     */
    private String decryptData(String body) throws Exception {
        JSONObject resultObject = JSON.parseObject(body);
        JSONObject resource = resultObject.getJSONObject("resource");
        String ciphertext = resource.getString("ciphertext");
        String nonce = resource.getString("nonce");
        String associatedData = resource.getString("associated_data");
 
        AesUtil aesUtil = new AesUtil(weChatProperties.getApiV3Key().getBytes(StandardCharsets.UTF_8));
        //密文解密
        String plainText = aesUtil.decryptToString(associatedData.getBytes(StandardCharsets.UTF_8),
                nonce.getBytes(StandardCharsets.UTF_8),
                ciphertext);
 
        return plainText;
    }
 
    /**
     * 给微信响应
     * @param response
     */
    private void responseToWeixin(HttpServletResponse response) throws Exception{
        response.setStatus(200);
        HashMap<Object, Object> map = new HashMap<>();
        map.put("code", "SUCCESS");
        map.put("message", "SUCCESS");
        response.setHeader("Content-type", ContentType.APPLICATION_JSON.toString());
        response.getOutputStream().write(JSONUtils.toJSONString(map).getBytes(StandardCharsets.UTF_8));
        response.flushBuffer();
    }
}

 支付流程等详情：

《苍穹外卖》项目学习记录-Day8订单支付-优快云博客

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