Java结合微信支付 weixin-java-pay V3接口

Java整合微信支付

1.起先的打算是根据微信支付的官方文档来一步步的去操作，但是因为时间与效率的问题还是使用了集成的框架，话不多说，直接开干。

1.1 maven依赖

  <properties>
    <weixin-java.version>4.3.0</weixin-java.version>
  </properties>

  <dependencies>
    
            <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-miniapp</artifactId>
            <version>${weixin-java.version}</version>
        </dependency>
 
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.8</version>
        </dependency>
        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-pay</artifactId>
            <version>${weixin-java.version}</version>
        </dependency>
   </dependencies>

1.2 配置文件 （写不写都行,可以直接写在类中）

properties格式

#微信支付相关参数
wxpay.mch-id=
#商户API证书序列号
wxpay.mch-serial-no=
#私钥
wxpay.private-key-path=apiclient_key.pem
wxpay.key-path=apiclient_cert.p12
wxpay.private-cert-path=apiclient_cert.pem
#APIv3密钥
wxpay.api-v3-key=
wxpay.appid=
#微信服务器地址
wxpay.domain=https://api.mch.weixin.qq.com
#接收结果通知地址
wxpay.notify-domain=

yml格式

#微信支付相关参数
wechat:
  pay:
    mchid: 
    #商户API证书序列号
    mch-serial-no: 
    #私钥 证书 
    private-key-path=apiclient_key.pem
    key-path=apiclient_cert.p12
    private-cert-path=apiclient_cert.pem
    #APIv3密钥
    api-v3-key: 
    appid: 
    #微信服务器地址
    domain: https://api.mch.weixin.qq.com
    #接收结果通知地址
    notify-domain: 

工具类

import com.github.binarywang.wxpay.config.WxPayConfig;
import com.github.binarywang.wxpay.service.WxPayService;
import com.github.binarywang.wxpay.service.impl.WxPayServiceImpl;

public class WxPayUtil {

    public static WxPayService getWxPayService() {
        WxPayService payService = new WxPayServiceImpl();
        WxPayConfig payConfig = new WxPayConfig();
        payConfig.setAppId("");
        payConfig.setMchId("");
        payConfig.setApiV3Key("");
        payConfig.setKeyPath("apiclient_cert.p12");//p12
        payConfig.setPrivateKeyPath("apiclient_key.pem");//私钥
        payConfig.setPrivateCertPath("apiclient_cert.pem");//证书
        payConfig.setUseSandboxEnv(false);
        payService.setConfig(payConfig);
        return payService;
    }
}

1.3下单

        //explain：所需参数 Payer、Amount、Description、OutTradeNo、TimeExpire、NotifyUrl。
        //explain：
        /*
            Payer：openid 支付人id
            Amount：Total：总额 单位分
            Currency ：货币 CNY人民币
            Description：商品描述
            OutTradeNo：商品单号
            TimeExpire：过期时间 
            NotifyUrl：回调函数 外网可以访问的地址，跳过权限验证
            
         
            payService.createOrderV3(TradeTypeEnum.JSAPI, request);
        */
　　　　
　　　　　public Map payOrder(){
        Map map = new HashMap<>();
        WxPayService payService = WxPayUtil.getWxPayService();
        try {
            WxPayUnifiedOrderV3Request request = new WxPayUnifiedOrderV3Request();
            WxPayUnifiedOrderV3Request.Payer payer = new WxPayUnifiedOrderV3Request.Payer();
            payer.setOpenid();
            WxPayUnifiedOrderV3Request.Amount amount = new WxPayUnifiedOrderV3Request.Amount();
            amount.setTotal();
            amount.setCurrency("CNY");
            request.setDescription();
            request.setOutTradeNo();
            Date nowDate = new Date();
            Date dateAfter = new Date(nowDate.getTime() + 300000);
            String format = DateUtil.format(dateAfter, "yyyy-MM-dd'T'HH:mm:ssXXX");
            request.setTimeExpire(format);
            request.setNotifyUrl("");
            request.setAmount();
            request.setPayer();
            map.put("data", payService.createOrderV3(TradeTypeEnum.JSAPI, request));
            return R.data(map);
        } catch (Exception e) {
            System.out.println("微信支付失败！订单号：{} " + feeOrder.getOrderNo() + ",原因:{}" + e.getMessage());
            e.getStackTrace();
            map.put("data", "支付失败，请稍后重试！");
        }
        return R.data(map);
}

1.4退款

   public Map refund(){
   
　　  Map map = new HashMap<>();
        try {
            WxPayService wxPayService = WxPayUtil.getWxPayService();
            WxPayRefundV3Request request = new WxPayRefundV3Request();
            com.github.binarywang.wxpay.bean.request.WxPayRefundV3Request.Amount amount = new             WxPayRefundV3Request.Amount();
      //退款单号 自己生成的单号
            request.setOutTradeNo();
      //使用内部单号
            request.setOutRefundNo();
            amount.setCurrency("CNY");
            amount.setRefund();
            amount.setTotal();
            request.setAmount(amount);
      //退款原因
            request.setReason();
            map.put("data", wxPayService.refundV3(request));
            return map;
        } catch (WxPayException e) {
            e.getMessage();
            map.put("data", "退款失败，请稍后重试！");
        }
        return map;
}

1.5微信支付回调

    @ApiOperation(value = "微信支付回调")
    @PostMapping("notify")
    public R notify() {
        WxPayService payService = WxPayUtil.getWxPayService();
        HttpServletRequest request = WebUtil.getRequest();
        SignatureHeader header = new SignatureHeader();
        header.setTimeStamp(request.getHeader("Wechatpay-Timestamp"));
        header.setNonce(request.getHeader("Wechatpay-Nonce"));
        header.setSignature(request.getHeader("Wechatpay-Signature"));
        header.setSerial(request.getHeader("Wechatpay-Serial"));
        Map map = new HashMap();
        try {
            String requestBody = WebUtil.getRequestBody(request.getInputStream());
            map.put("data", payService.parseOrderNotifyV3Result(requestBody, header));
            return R.data(map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return R.data(map);
    }