苍穹外卖--订单支付

原创已于 2025-06-17 17:20:33 修改 · 487 阅读

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文章标签：

#苍穹外卖 #黑马 #微信支付 #用户支付

于 2025-06-17 17:17:45 首次发布

1.微信支付介绍

微信支付产品：

参考：https://pay.weixin.qq.com/static/product/product_index.shtml

微信支付接入流程：

微信小程序支付时许图：

5.调用微信下单接口：

9.用户确认支付：

JSAPI下单：商户系统调用该接口在微信支付服务后生成预支付交易单

微信小程序调起支付：通过JSAPI下单接口获取到发起支付的必要参数prepay_id，然后使用微信支付提供的小程序方法调起小程序支付

2.微信支付准备工作

获取微信支付平台正书、商户私钥文件：

获取临时域名：支付成功后微信服务通过该域名回调我们的程序

进入这个软件的文件目录里去，然后在搜索栏输入cmd，在cmd里输入命令：

cpolar.exe http 8080(输入自己的后台端口号)

3.导入代码

微信支付相关的配置：

OrderController.java代码：

/**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    @PutMapping("/payment")
    @ApiOperation("订单支付")
    public Result<OrderPaymentVO> payment(@RequestBody OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        log.info("订单支付：{}", ordersPaymentDTO);
        OrderPaymentVO orderPaymentVO = orderService.payment(ordersPaymentDTO);
        log.info("生成预支付交易单：{}", orderPaymentVO);
        return Result.success(orderPaymentVO);
    }

OrderService.java代码：

/**
     * 订单支付
     * @param ordersPaymentDTO
     * @return
     */
    OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception;

    /**
     * 支付成功，修改订单状态
     * @param outTradeNo
     */
    void paySuccess(String outTradeNo);

OrderServiceImpl.java代码：

    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;

/**
     * 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);
    }

OrderMapper.java代码：

/**
     * 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);

OrderMapper.xml代码：

<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>

UserMapper.java代码：

@Select("SELECT * FROM user WHERE id = #{id}")
    User getById(Long userId);

PayNotifyController.java代码：

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();
    }
}