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spring——微信开发

网页授权登陆

申请公众号（测试号也行）

申请测试号链接

spring——微信开发

申请后得到appID和appsecret

配置：

spring——微信开发

需要可以外网访问的域名，没有的话可以搞个内网穿透

开发

使用第三方的SDK进行开发，避免重复造轮子，微信的开发文档如下：

spring——微信开发

第三方SDK

流程：构造链接，获取到AccessToken，拿到openId

配置WxMpServiceImpl

@Component
public class WechatMpConfig {
    @Autowired
    private WechatAccountConfig wechatAccountConfig;

    @Bean
    public WxMpService wxMpService() {
        WxMpService wxMpService = new WxMpServiceImpl();
        wxMpService.setWxMpConfigStorage(wxMpConfigStorage());
        return wxMpService;
    }

    @Bean
    public WxMpConfigStorage wxMpConfigStorage() {
        WxMpInMemoryConfigStorage wxMpConfigStorage = new WxMpInMemoryConfigStorage();
        wxMpConfigStorage.setAppId(wechatAccountConfig.getMpAppId());
        wxMpConfigStorage.setSecret(wechatAccountConfig.getMpAppSecret());
        return wxMpConfigStorage;
    }
}

接口调用

//跳转到授权链接
     @GetMapping("/authorize")
        public String authorize( @ApiParam(name = "returnUrl", value = "跳转链接")@RequestParam("returnUrl") String returnUrl) {
            //1. 配置
            //2. 调用方法
            String url = projectUrlConfig.getWechatMpAuthorize() + "/wechat/userInfo";
            String redirectUrl = wxMpService.oauth2buildAuthorizationUrl(url, WxConsts.OAuth2Scope.SNSAPI_BASE, URLEncoder.encode(returnUrl));
            return "redirect:" + redirectUrl;
    }
    //确定授权后的处理方法
    @GetMapping("/userInfo")
    public String userInfo(@ApiParam(name = "code", value = "code")@RequestParam("returnUrl") String code,
                           @ApiParam(name = "returnUrl", value = "跳转链接")@RequestParam("returnUrl") String returnUrl ){
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = new WxMpOAuth2AccessToken();
        try {
            wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.error("[微信页面授权失败]{}",e);
            throw new SellException(ResultEnum.WECHAT_MP_ERROR.getCode(),e.getError().getErrorMsg());
        }
        String openId = wxMpOAuth2AccessToken.getOpenId();

        return "redirect:" + returnUrl + "openId = " + openId;
    }

第三方网页扫码登陆

开发前准备

微信开放平台，需要自己去申请一个应用，审核通过后得到

spring——微信开发

开发

生成二维码，拿到openId

第三方SDK

配置WxMpServiceImpl

@Component
public class WechatOpenConfig {
    @Autowired
    private WechatAccountConfig accountConfig;

    @Bean
    public WxMpService wxOpenService() {
        WxMpService wxOpenService = new WxMpServiceImpl();
        wxOpenService.setWxMpConfigStorage(wxOpenConfigStorage());
        return wxOpenService;
    }

    @Bean
    public WxMpConfigStorage wxOpenConfigStorage() {
        WxMpInMemoryConfigStorage wxMpInMemoryConfigStorage = new WxMpInMemoryConfigStorage();
        wxMpInMemoryConfigStorage.setAppId(accountConfig.getOpenAppId());
        wxMpInMemoryConfigStorage.setSecret(accountConfig.getOpenAppSecret());
        return wxMpInMemoryConfigStorage;
    }

2. 接口调用

//跳转二维码页面，生成二维码
    @GetMapping("/qrAuthorize")
    public String qrAuthorize(@RequestParam("returnUrl") String returnUrl) {
        String url = projectUrlConfig.getWechatOpenAuthorize() + "/sell/wechat/qrUserInfo";
        String redirectUrl = wxOpenService.buildQrConnectUrl(url, WxConsts.QrConnectScope.SNSAPI_LOGIN, URLEncoder.encode(returnUrl));
        return "redirect:" + redirectUrl;
    }

    //扫码后逻辑登陆
    @GetMapping("/qrUserInfo")
    public String qrUserInfo(@RequestParam("code") String code,
                             @RequestParam("state") String returnUrl) {
        WxMpOAuth2AccessToken wxMpOAuth2AccessToken = new WxMpOAuth2AccessToken();
        try {
            wxMpOAuth2AccessToken = wxOpenService.oauth2getAccessToken(code);
        } catch (WxErrorException e) {
            log.error("【微信网页授权】{}", e);
            throw new SellException(ResultEnum.WECHAT_MP_ERROR.getCode(), e.getError().getErrorMsg());
        }
        log.info("wxMpOAuth2AccessToken={}", wxMpOAuth2AccessToken);
        String openId = wxMpOAuth2AccessToken.getOpenId();

        return "redirect:" + returnUrl + "?openid=" + openId;
    }
```

微信支付

微信支付SDK ，这个SDK是上方的SDK对支付的进一步封装

微信支付官方开发文档

需要申请一个具有商家资质的账号，等到mchId和mchKey

spring——微信开发

配置BestPayServiceImpl

@Component
public class WechatPayConfig {

    @Autowired
    private WechatAccountConfig wechatAccountConfig;

    @Bean
    public BestPayServiceImpl bestPayService(){
        BestPayServiceImpl bestPayService = new BestPayServiceImpl();
        bestPayService.setWxPayH5Config(wxPayH5Config());
        return bestPayService;
    }

    @Bean
    public WxPayH5Config wxPayH5Config(){
        WxPayH5Config wxPayH5Config = new WxPayH5Config();
        wxPayH5Config.setAppId(wechatAccountConfig.getMpAppId());
        wxPayH5Config.setAppSecret(wechatAccountConfig.getMpAppSecret());
        wxPayH5Config.setMchId(wechatAccountConfig.getMchId());
        wxPayH5Config.setMchKey(wechatAccountConfig.getMchKey());
        wxPayH5Config.setKeyPath(wechatAccountConfig.getKeyPath());
        wxPayH5Config.setNotifyUrl(wechatAccountConfig.getNotifyUrl());
        return wxPayH5Config;
    }
}

编写Service

@Service
@Slf4j
public class PayServiceImpl implements PayService {

    private static final String ORDER_NAME = "微信点餐订单";

    @Autowired
    private BestPayServiceImpl bestPayService;

    @Autowired
    private OrderService orderService;

    //发起支付
    @Override
    public PayResponse create(OrderDTO orderDTO) {
        PayRequest payRequest = new PayRequest();
        payRequest.setOpenid(orderDTO.getBuyerOpenid());
        payRequest.setOrderAmount(orderDTO.getOrderAmount().doubleValue());
        payRequest.setOrderId(orderDTO.getOrderId());
        payRequest.setOrderName(ORDER_NAME);
        payRequest.setPayTypeEnum(BestPayTypeEnum.WXPAY_H5);
        log.info("【微信支付】发起支付, request={}", JsonUtil.toJson(payRequest));

        PayResponse payResponse = bestPayService.pay(payRequest);
        log.info("【微信支付】发起支付, response={}", JsonUtil.toJson(payResponse));
        return payResponse;
    }

    //支付后微信异步通知，告之微信支付结果
    @Override
    public PayResponse notify(String notifyData) {
        PayResponse payResponse = bestPayService.asyncNotify(notifyData);
        log.info("【微信支付】异步通知, payResponse={}", JsonUtil.toJson(payResponse));

        //查询订单
        OrderDTO orderDTO = orderService.findOne(payResponse.getOrderId());
        //判断订单是否存在
        if (orderDTO == null) {
            log.error("【微信支付】异步通知, 订单不存在, orderId={}", payResponse.getOrderId());
            throw new SellException(ResultEnum.ORDER_NOT_EXIST);
        }

        //判断金额是否一致(0.10   0.1)
        if (!MathUtil.equals(payResponse.getOrderAmount(), orderDTO.getOrderAmount().doubleValue())) {
            log.error("【微信支付】异步通知, 订单金额不一致, orderId={}, 微信通知金额={}, 系统金额={}",
                    payResponse.getOrderId(),
                    payResponse.getOrderAmount(),
                    orderDTO.getOrderAmount());
            throw new SellException(ResultEnum.WXPAY_NOTIFY_MONEY_VERIFY_ERROR);
        }

        //修改订单的支付状态
        orderService.paid(orderDTO);
        return payResponse;
    }

    //退款
    @Override
    public RefundResponse refund(OrderDTO orderDTO) {
        RefundRequest refundRequest = new RefundRequest();
        refundRequest.setOrderId(orderDTO.getOrderId());
        refundRequest.setOrderAmount(orderDTO.getOrderAmount().doubleValue());
        refundRequest.setPayTypeEnum(BestPayTypeEnum.WXPAY_H5);
        log.info("【微信退款】request={}", JsonUtil.toJson(refundRequest));
        RefundResponse refundResponse = bestPayService.refund(refundRequest);
        return refundResponse;
    }
}

微信模版消息通知

在公众号管理设置好消息模版

编写service

@Override
    public void orderStatus(OrderDTO orderDTO) {
        WxMpTemplateMessage templateMessage = new WxMpTemplateMessage();
        templateMessage.setTemplateId(wechatAccountConfig.getTemplateId().get("orderStatus"));
        templateMessage.setToUser(orderDTO.getBuyerOpenid());
        List<WxMpTemplateData> data = Arrays.asList(
                new WxMpTemplateData("first","111"),
                new WxMpTemplateData("keyword1", "微信点餐"),
                new WxMpTemplateData("keyword2", "18868812345"),
                new WxMpTemplateData("keyword3", orderDTO.getOrderId()),
                new WxMpTemplateData("keyword4", orderDTO.getOrderStatusEnum().getMessage()),
                new WxMpTemplateData("keyword5", "￥" + orderDTO.getOrderAmount()),
                new WxMpTemplateData("remark", "欢迎再次光临！")
        );
        try{
            wxMpService.getTemplateMsgService().sendTemplateMsg(templateMessage);
        }catch (WxErrorException e){
            log.error("【微信模版消息】发送失败");
        }
    }
}

原文 https://segmentfault.com/a/1190000020042514

正文到此结束