WEB端第三方支付接入 - 微信 - 扫码支付

需要接入微信支付了

微信那边需要支付商户号.

百度搜微信支付,按照官网操作就可以了.

直接上代码:

1 - 引入依赖

<dependency>
    <groupId>com.github.binarywang</groupId>
    <artifactId>weixin-java-pay</artifactId>
    <version>3.8.0</version>
</dependency>

2 - 配置

import com.github.binarywang.wxpay.config.WxPayConfig;
import com.github.binarywang.wxpay.service.WxPayService;
import com.github.binarywang.wxpay.service.impl.WxPayServiceImpl;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class WxpayConfig {

    @Value("${***}")
    private String appId;

    @Value("${***}")
    private String mchId;

    @Value("${***}")
    private String key;

    @Bean
    public WxPayService wxService() {
        WxPayConfig payConfig = new WxPayConfig();
        payConfig.setAppId(appId);
        payConfig.setMchId(mchId);
        payConfig.setMchKey(key);
        WxPayService wxPayService = new WxPayServiceImpl();
        wxPayService.setConfig(payConfig);
        return wxPayService;
    }
}

3 - 微信PC支付Native方式,接口就不写了,调用方法而已,返回的是用于生成二维码的url

// 注入wxNotifyUrl,wxTradeType,wxRequestIp,具体参数含义请参考官方说明

// 微信支付
public String wxNativePay(WXpayPara para) throws WxPayException {
    WxPayUnifiedOrderRequest orderRequest = new WxPayUnifiedOrderRequest();
    orderRequest.setDeviceInfo("WEB");
    orderRequest.setNotifyUrl(wxNotifyUrl);
    orderRequest.setOutTradeNo(uuid());
    orderRequest.setSpbillCreateIp(wxRequestIp);
    orderRequest.setTotalFee(BaseWxPayRequest.yuanToFen(para.getTotalFee().toString()));
    orderRequest.setProductId(outTradeNo);
    orderRequest.setBody(para.getBody());
    orderRequest.setTradeType(wxTradeType);
    // 可以进行订单记录相关处理
    // 返回一个地址,给前端生成二维码,用户扫码支付
    return result.getCodeUrl();
}

4 - 微信支付回调,如果不成功就会按照时间回调,官网有说明

// 注入WxPayService

public void wxPayNotify(HttpServletRequest request) throws IOException, WxPayException, SQLException {
    String xmlRequest = IOUtils.toString(request.getInputStream(), request.getCharacterEncoding());
    WxPayOrderNotifyResult notifyResult = wxPayService.parseOrderNotifyResult(xmlRequest);
    String outTradeNo = notifyResult.getOutTradeNo();
    // 成功返回 - SUCCESS,就是"SUCCESS".equals(code)
    if (!isSuccess(notifyResult.getResultCode())) {
        throw new WxPayException("WX Notify status is not SUCCESS");
    }
    // 根据outTradeNo查询订单是否存在,因为我在支付的时候先创建订单,省略查询代码
    if (order == null) {
        throw new SQLException();
    }
    // 如果已支付,就不做处理了,因为可能回调多次
    if (order.isPay()) {
        return;
    }
    String totalFee = BaseWxPayResult.fenToYuan(notifyResult.getTotalFee());
    BigDecimal totalAmount = new BigDecimal(totalFee);
    // 判断金额是否一致
    if (order.getAmount().compareTo(totalAmount) != 0) {
        throw new WxPayException("WX Notify totalFee is not equal");
    }
    String tradeNo = notifyResult.getTransactionId();
    // 记录交易号,省略代码
}

5 - 接口,返回消息给微信

// 微信异步通知
@RequestMapping(value = "***")
public String wxPayNotify(HttpServletRequest request, HttpServletResponse response) {
    try {
        payService.wxPayNotify(request);
        String resultXml =
                "<xml>" +
                    "<return_code><![CDATA[SUCCESS]]></return_code>" +
                    "<return_msg><![CDATA[OK]]></return_msg>" +
                "</xml> ";
        response.setContentType("text/xml");
        BufferedOutputStream out = new BufferedOutputStream(response.getOutputStream());
        out.write(resultXml.getBytes());
        out.flush();
        out.close();
        return resultXml;
    } catch (Exception e) {
        e.printStackTrace();
        return "failure";
    }
}

微信接入完成,经过测试,注意配置参数.