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

申请后得到appID和appsecret
配置：

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：

第三方SDK
流程：构造链接，获取到AccessToken，拿到openId

1. 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;
       }
   }

2. 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

开发

生成二维码，拿到openId
第三方SDK

1. 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

1. 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;
       }
   }

2. 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");
        }
    }
}