SpringBoot实现微信支付，微信扫码支付，Native支付（全网最详细教程）

1.添加微信支付依赖

       <!--微信支付-->
        <dependency>
            <groupId>com.github.wxpay</groupId>
            <artifactId>wxpay-sdk</artifactId>
            <version>RELEASE</version>
        </dependency>

        <!--httpclient-->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>

2.添加配置yml配置文件 如果使用的不是yml 可自行配置

weixin:
  appid: wx09c076475bb9xxxx  #公众账号ID
  partner: 164544xxxx  #商户号
  partnerkey: zebrainfo20230809wwwcomcn1xxxxxx  #商户密钥
  notifyurl: http://8de92n.xxxx.cc/pay/info #回调地址

3.自行添加一个service层 （我这边叫PayService）

public interface PayService {

    public Object createUrl(CustomerOrder CustomerOrder);
}

4.实现此service层 （其中生成随机订单号使用了一个工具类，可私信我来拿，或你们把随机订单号代码注释，自己去找一个即可）

package com.banma.wxpay;
 
import com.banma.entity.CustomerOrder;
import com.banma.entity.Enterprise;
import com.banma.mapper.CustomerOrderMapper;
import com.banma.mapper.EnterpriseMapper;
import com.banma.util.HttpClient;
import com.banma.util.OrderCodeFactory;
import com.banma.wxpay.service.PayService;
import com.github.wxpay.sdk.WXPayUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
@Service
public class PayServiceImpl implements PayService {
    //获取yml中的公众账号ID
    @Value("${weixin.appid}")
    private String appid;
    //获取yml中的商户号
    @Value("${weixin.partner}")
    private String partner;
    @Value("${weixin.partnerkey}")
    private String partnerkey;
    @Value("${weixin.notifyurl}")
    private String notifyurl;

    @Autowired
    EnterpriseMapper EnterpriseMapper;

    @Autowired
    CustomerOrderMapper CustomerOrderMapper;

    @Override
    public Object createUrl(CustomerOrder CustomerOrder) {
        //orderId:订单的id，price：需要支付的金额（默认单位为 分 ）
        Map<String,Object> map = new HashMap<String,Object>();
        try {
            //判断付款用户是否注册企业
            Enterprise enterprise = EnterpriseMapper.findEnterpriseAndEnterpriseIdByEnterpriseName(CustomerOrder.getEnterpriseName());
            //查询到没有该企业返回404
            if(enterprise == null){
                map.put("code","404");
                return map;
            }
            //生成随机订单号
            String orderCode = OrderCodeFactory.getOrderCode(enterprise.getEnterpriseId().longValue());
            CustomerOrder.setCustomerOrderNumber(orderCode);

            CustomerOrder.setEnterpriseId(enterprise.getEnterpriseId());
            //设置订单待支付状态
            CustomerOrder.setCustomerOrderStart(2);
            CustomerOrderMapper.addCustomerOrder(CustomerOrder);

            Map<String, String> param = new HashMap<>();
            param.put("appid", "wx09c076475bb9xxxx");
            param.put("mch_id", "164544xxxx");
            param.put("nonce_str", WXPayUtil.generateNonceStr());
            param.put("body", "企业助力宝套餐购买"+CustomerOrder.getCustomerOrderTransactionNumber());
            param.put("out_trade_no", orderCode);
            String money = String.valueOf(CustomerOrder.getCustomerOrderPrice()*100);
            if (money.indexOf(".") > 0) {
                // 去掉多余的0
                money = money.replaceAll("0+?$", "");
                // 如果最后一位是. 则去掉
                money = money.replaceAll("[.]$", "");
            }
            System.out.println(money);
            param.put("total_fee", money);
            param.put("spbill_create_ip", "127.0.0.1");
            param.put("notify_url", "https://www.zebraxxxx.com.cn/activity/info");
            param.put("trade_type", "NATIVE");
            System.out.println(param.toString());
            //调取微信支付的接口
            String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
            //将map数据转换为xml格式
            String xml = WXPayUtil.generateSignedXml(param, "zebrainfo20230809wwwcomcn1xxxxxx");
            //创建网络链接
            HttpClient httpClient = new HttpClient(url);
            httpClient.setXmlParam(xml);
            httpClient.setHttps(true);
            httpClient.post();
            String content = httpClient.getContent();
            return WXPayUtil.xmlToMap(content);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

5.编写Controller层调用API

package com.banma.controller.wechatPayController;

import com.banma.entity.CustomerOrder;
import com.banma.util.Result;
import com.banma.wxpay.PayServiceImpl;
import com.banma.wxpay.service.PayService;
import com.github.wxpay.sdk.WXPayUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;


@RestController
@RequestMapping("/activity")
@CrossOrigin
@Api(tags = "微信支付API")
public class WeChatPayController {

    @Autowired
    PayService PayService;

    @ApiOperation("微信统一收单下单支付接口API")
    @PostMapping("/wxPay")
    public Result wxPay(@RequestBody CustomerOrder CustomerOrder){
        Map<String,Object> map = (Map<String, Object>) PayService.createUrl(CustomerOrder);
        Integer code = map.get("code")==null?0:404;
        if(code != 0 && code == 404){
            return Result.fail("检测到您还未注册企业，请前往企业注册!");
        }
        System.out.println(map);
        return Result.succ("调用成功",map);
    }

    @RequestMapping("/info")
    public String info(HttpServletRequest httpServletRequest){
        try {
            //读取支付回调数据
            InputStream inputStream = httpServletRequest.getInputStream();
            ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
            byte[] bytes=new byte[1024];
            int len=0;
            while ((len=inputStream.read(bytes))!=-1){
                byteArrayOutputStream.write(bytes,0,len);
            }
            byteArrayOutputStream.close();
            inputStream.close();
            String res = new String(byteArrayOutputStream.toByteArray(), "UTF-8");
            System.out.println(res);
            //返回格式必须是这样
            Map<String,String> map=new HashMap<>();
            map.put("return_code", "SUCCESS");
            map.put("return_msg", "OK");
            System.out.println("发送成功！");
            return WXPayUtil.mapToXml(map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }


}

调用上面的统一下单接口返回的Url在前端转换为二维码即可实现扫码支付亲测可用!