微信-Native支付（扫二维码支付）工具类 2023最新保姆教程

0、照着微信开发文档取到证书、秘钥等好几个key

1、获取商户号merchantId
账户中心->商户信息->微信支付商户号

3、获取商户证书序列号merchantSerialNumber
账户中心->API安全->API证书管理

5、获取appID
产品中心->AppID账号管理

1、这个链接教你获取各种key

Java接入微信支付APIV3（Native）_java native微信支付-CSDN博客

2、导入依赖

<!--微信支付依赖-->
        <dependency>
            <groupId>com.github.wechatpay-apiv3</groupId>
            <artifactId>wechatpay-java</artifactId>
            <version>0.2.5</version>
        </dependency>
        <!-- hutool -->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.16</version>
        </dependency>

3、工具类直接复制配置好各种key 就可以直接调用了


import com.wechat.pay.java.core.Config;
import com.wechat.pay.java.core.RSAAutoCertificateConfig;
import com.wechat.pay.java.core.notification.NotificationConfig;
import com.wechat.pay.java.core.notification.NotificationParser;
import com.wechat.pay.java.core.notification.RequestParam;
import com.wechat.pay.java.service.partnerpayments.nativepay.model.Transaction;
import com.wechat.pay.java.service.payments.nativepay.NativePayService;
import com.wechat.pay.java.service.payments.nativepay.model.Amount;
import com.wechat.pay.java.service.payments.nativepay.model.PrepayRequest;
import com.wechat.pay.java.service.payments.nativepay.model.PrepayResponse;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;

/**
 * Native 支付工具类  获取支付地址、解析支付数据
 */
@Slf4j
public class PayUtils {
    //商户号
    public static String merchantId = "16***";
    //商户API私钥路径 服务器里的路径 
    public static String privateKeyPath = "/home/jx****rvice/apiclient_key.pem";
    //商户证书序列号
    public static String merchantSerialNumber = "*******";
    //商户APIV3密钥
    public static String apiV3key = "iK8fl7*3";
    public static String appId = "wx0*****7e";

    // 使用自动更新平台证书的RSA配置
    public static Config config = new RSAAutoCertificateConfig.Builder()
            .merchantId(merchantId) // 商户号
            .privateKeyFromPath(privateKeyPath)  // API证书地址（此处的路径自己调试一下，能找到就行）
            .merchantSerialNumber(merchantSerialNumber) // API证书序列号
            .apiV3Key(apiV3key) // API密匙
            .build();
    // 初始化 解析器 NotificationParser
    public static NotificationParser parser = new NotificationParser((NotificationConfig) config);
    /**
     * 获取支付地址 设置回调路径
     *
     * @param total     【总金额】 订单总金额，单位为分
     * @param desc      商品描述
     * @param notifyUrl 回调地址（必须是http）   如："http://*7.*2.***.2**:8081/pay/notifyNative"
     * @return
     * @Param orderNo 自己后端的唯一订单号
     */
    public static String nativePayAddr(Integer total, String desc, String notifyUrl, String orderNo, String attach) {
        // 构建service
        NativePayService service = new NativePayService.Builder().config(config).build();
        // request.setXxx(val)设置所需参数，具体参数可见Request定义
        PrepayRequest request = new PrepayRequest();
        Amount amount = new Amount();
        amount.setTotal(total); // 【总金额】 订单总金额，单位为分。
        request.setAmount(amount);
        request.setAppid(appId); // 应用ID
        request.setMchid(merchantId);  // 商户号
        request.setDescription(desc);  // 商品描述
        request.setNotifyUrl(notifyUrl);  // 支付成功的回调地址
        request.setAttach(attach);
        // 生成模拟系统内部订单号（yyyyMMddHHmmssSSS）
        request.setOutTradeNo(orderNo);  // 自己后端的唯一订单号，此处使用时间模拟
        // 调用下单方法，得到应答
        try {
            // 发送请求
            PrepayResponse response = service.prepay(request);
            // 使用微信扫描 code_url 对应的二维码，即可体验Native支付
            System.out.println(response.getCodeUrl());
            // 将支付地址返回
            return response.getCodeUrl();
        } catch (Exception e) {
            System.out.println("获取支付的url失败：" + e.getMessage());
            return e.getMessage();
        }
    }



    /**
     * 解析器 解密微信给的数据
     *
     * @param request
     * @return
     */
    public Transaction parser(HttpServletRequest request) {
        try {
            // 获取请求体原内容（此时获取的数据是加密的）
            BufferedReader reader = request.getReader();
            StringBuilder requestBody = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                requestBody.append(line);
            }
            // 获取请求携带的数据，构造参数
            RequestParam requestParam = new RequestParam.Builder()
                    .serialNumber(request.getHeader("Wechatpay-Serial")) // 微信支付平台证书的序列号
                    .nonce(request.getHeader("Wechatpay-Nonce")) // 签名中的随机数
                    .signature(request.getHeader("Wechatpay-Signature"))  // 应答的微信支付签名
                    .timestamp(request.getHeader("Wechatpay-Timestamp")) // 签名中的时间戳
                    .body(requestBody.toString()) // 请求体内容（原始内容，不要解析）
                    .build();
            // 解析为Transaction对象（解密数据）
            Transaction transaction = parser.parse(requestParam, Transaction.class);
            //解密完成后的数据
            return transaction;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

}

4、具体调用复制直接用

swagger-ui 、ipUtil工具类、@Slf4j 哪里报红删哪里

实体类、支付记录表自己设计吧记得把支付日志表给我一份




import cn.hutool.core.date.DatePattern;
import cn.hutool.core.date.DateUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.jxn.mapper.PayLogMapper;
import com.jxn.pojo.PayLog;
import com.jxn.utils.IpUtils;
import com.jxn.utils.PayUtils;
import com.jxn.utils.Result;
import com.wechat.pay.java.core.notification.RequestParam;
import com.wechat.pay.java.service.partnerpayments.nativepay.model.Transaction;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.DynamicParameter;
import io.swagger.annotations.DynamicParameters;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Date;

/**
 * @author szl
 * @date 2023/11/2 0002 10:30
 */
@Slf4j
@Api(tags = "支付")
@RestController
@CrossOrigin
@RequestMapping("/pay")
public class WechatPayController {

    @Autowired
    PayLogMapper payLogMapper;

    /**
     * Native支付下单，获取支付地址
     *
     * @param
     * @return 支付地址，前端用于生成支付二维码
     */
    @ApiOperation(value = "预支付，获取支付地址", response = Result.class)
    @DynamicParameters(name = "data", properties = {
            @DynamicParameter(name = "total", value = "页码", example = "1", required = true),
            @DynamicParameter(name = "userId", value = "条数", example = "10", required = true),
    })
    @PostMapping("/getNativePayAddr")
    public String nativePayAddr(HttpServletRequest request, @RequestBody JSONObject data) {
        //String ipAddr = IpUtils.getIpAddr(request);
        Integer total = data.getInteger("total");
        String userId = data.getString("userId");
        JSONObject attach = new JSONObject();
        attach.put("userId", userId);
        //attach.put("ipAddr", ipAddr);
        String notifyUrl = "http://4*.*2.1*2.2**:8081/pay/notifyNative";
        String orderNo = DateUtil.format(new Date(), DatePattern.PURE_DATETIME_MS_PATTERN);
        //调用支付工具类，获取支付的url（也就是二维码）
        String payAddr = PayUtils.nativePayAddr(total, "测试xxx商品简述", notifyUrl, orderNo, attach.toString());
        return payAddr;
    }

    @ApiOperation(value = "成功支付的回调", response = Result.class)
    @PostMapping("/notifyNative")
    public void notifyNative(HttpServletRequest request, HttpServletResponse response) throws IOException {
    
        //String ipAddr = IpUtils.getIpAddr(request);
        //log.info("ipaddr：" + ipAddr);
        String a = "{\"transaction_id\":\"1217752501201407033233368018\",\"amount\":{    \"payer_total\":100,    \"total\":100,    \"currency\":\"CNY\",    \"payer_currency\":\"CNY\"},\"mchid\":\"1230000109\",\"trade_state\":\"SUCCESS\",\"bank_type\":\"CMC\",\"promotion_detail\":[    {        \"amount\":100,        \"wechatpay_contribute\":0,        \"coupon_id\":\"109519\",        \"scope\":\"GLOBAL\",        \"merchant_contribute\":0,        \"name\":\"单品惠-6\",        \"other_contribute\":0,        \"currency\":\"CNY\",        \"stock_id\":\"931386\",        \"goods_detail\":[            {                \"goods_remark\":\"商品备注信息\",                \"quantity\":1,                \"discount_amount\":1,                \"goods_id\":\"M1006\",                \"unit_price\":100            },            {                \"goods_remark\":\"商品备注信息\",                \"quantity\":1,                \"discount_amount\":1,                \"goods_id\":\"M1006\",                \"unit_price\":100            }        ]    },    {        \"amount\":100,        \"wechatpay_contribute\":0,        \"coupon_id\":\"109519\",        \"scope\":\"GLOBAL\",        \"merchant_contribute\":0,        \"name\":\"单品惠-6\",        \"other_contribute\":0,        \"currency\":\"CNY\",        \"stock_id\":\"931386\",        \"goods_detail\":[            {                \"goods_remark\":\"商品备注信息\",                \"quantity\":1,                \"discount_amount\":1,                \"goods_id\":\"M1006\",                \"unit_price\":100            },            {                \"goods_remark\":\"商品备注信息\",                \"quantity\":1,                \"discount_amount\":1,                \"goods_id\":\"M1006\",                \"unit_price\":100            }        ]    }],\"success_time\":\"2018-06-08T10:34:56+08:00\",\"payer\":{    \"openid\":\"oUpF8uMuAJO_M2pxb1Q9zNjWeS6o\"},\"out_trade_no\":\"1217752501201407033233368018\",\"AppID\":\"wxd678efh567hg6787\",\"trade_state_desc\":\"支付成功\",\"trade_type\":\"MICROPAY\",\"attach\":\"自定义数据\",\"scene_info\":{    \"device_id\":\"013467007045764\"}\n}";
        Transaction transaction = JSON.parseObject(a, Transaction.class);
        //Transaction transaction = new PayUtils().parser(request);
        log.info("解析后的数据：" + transaction.toString());
        // 获取支付单号
        log.info("支付成功，回调信息：{}", transaction);
        // 打印其中的"微信支付单号"字段，可用于查单操作
        log.info("微信支付单号：{}", transaction.getTransactionId());
        //解密完成后的数据
        PayLog payLog = new PayLog();
        payLog.setPayStatus(transaction.getTradeStateDesc());
        payLog.setCreateTime(transaction.getSuccessTime());
        payLog.setTotal(transaction.getAmount().getTotal());
        payLog.setTransactionId(transaction.getTransactionId());//微信支付系统生成的订单号
        payLog.setOrderNo(transaction.getOutTradeNo());//自己系统的订单号
        payLog.setPayType(transaction.getTradeType().toString());//支付类型
        if ("SUCCESS".equals(transaction.getTradeState().toString())) {
            payLog.setPayStatus("1");//交易状态
        } else {
            payLog.setPayStatus("0");//交易状态
        }
        payLog.setOpenid(transaction.getPayer().getSubOpenid() + transaction.getPayer().getSpOpenid());//支付人信息 包含openid
        String goodsName = transaction.getPromotionDetail().get(0).getName();
        payLog.setReturnData(transaction.toString());
        log.info("插入支付日志：{}", payLog.toString());
        payLogMapper.insert(payLog);
    }
}

这是官方的地址微信回调给到你的数据解析后存到自己的支付记录表

支付通知 - Native支付 | 微信支付商户文档中心