微信点餐SpringBoot-17：卖家扫码登录

1、SellerInfoRepository

public interface SellerInfoRepository extends JpaRepository<SellerInfo,String> {
    SellerInfo findByOpenid(String openid);
}

2、SellerService

public interface SellerService {
    /**
     * 查询卖家信息
     * @param openid
     * @return
     */
    SellerInfo findSellerInfoByOpenid(String openid);
}

3、SellerServiceImpl

@Service
public class SellerServiceImpl implements SellerService {
    @Autowired
    private SellerInfoRepository repository;

    public SellerInfo findSellerInfoByOpenid(String openid){
        return repository.findByOpenid(openid);
    }
}

4、WechatAccountConfig

@Data
@Component
@ConfigurationProperties(prefix = "wechat")
public class WechatAccountConfig {

    //公众号appid
    private String mpAppId;

    //公众号appSecret
    private String mpAppSecret;

    //商户号
    private String mchId;

    //商户秘钥
    private String mchKey;
    
    //商户证书路径
    private String keyPath;

    //微信支付异步通知
    private String notifyUrl;

    //开放平台id
    private String openAppId;

    //开放平台秘钥
    private String openAppSecret;
}

5、WechatOpenConfig

@Configuration
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;
    }
}

6、ProjectUrlConfig

@Data
@Component
@ConfigurationProperties(prefix = "projecturl")
public class ProjectUrlConfig {

    //微信公众屏号授权url
    public String wechatMpAuthorize;

    //微信开放平台url
    public String wechatOpenAuthorize;

    //点餐系统
    public String sell;
}

在application.properties中配置

### projectUrl
# 公众平台
projecturl.wechat-mp-authorize=http://heng.nat300.top
# 开放平台
projecturl.wechat-open-authorize=http://heng.nat300.top
projecturl.sell=http://heng.nat300.top

@Controller
@RequestMapping("/wechat")
@Slf4j
public class WeChatController {
    @Autowired
    private WxMpService wxMpService;

    @Autowired
    private WxMpService wxOpenService;

    @Autowired
    private ProjectUrlConfig projectUrlConfig;

    @GetMapping("/qrAuthorize")
    public String qrAuthorize(@RequestParam("returnUrl") String returnUrl) {
        //String url = projectUrlConfig.getWechatOpenAuthorize() + "/sell/wechat/qrUserInfo";
        //String redirectUrl = wxOpenService.buildQrConnectUrl(url, WxConsts.QRCONNECT_SCOPE_SNSAPI_LOGIN, URLEncoder.encode(returnUrl));
        String redirectUrl = wxOpenService.buildQrConnectUrl(returnUrl, WxConsts.QRCONNECT_SCOPE_SNSAPI_LOGIN,
                URLEncoder.encode(projectUrlConfig.getSell() + "/sell/wechat/qrUserInfo"));
        return "redirect:" + redirectUrl;
    }

    @GetMapping("/qrUserInfo")
    public String qrUserInfo(@RequestParam("code") String code) {
        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();
        String redirectUrl = "http://www.imooc.com";
        return "redirect:" + redirectUrl+ "?openid=" + openId;
    }
}

访问连接：

https://open.weixin.qq.com/connect/qrconnect?appid=wx6ad144e54af67d87&redirect_uri=http%3A%2F%2Fsell.springboot.cn%2F自己的openid名称&response_type=code&scope=snsapi_login&state=http://heng.nat300.top/sell/wechat/qrUserInfo

7、登录与登出