12.18 微信扫码获取openid与登陆

官方文档: https://open.weixin.qq.com/

1.先获取code

1-1 配置项目配置文件

wechat:
  mpAppId: wxd898fcb01713c658
  mpAppSecret: 47ccc303338cee6e62894fxxxxxxxxxxx
  openAppId: wx6ad144e54af67d87/////////
  openAppSecret: 91a2ff6d38a2bbccfb7e9f9079108e2e/////////配置密钥

　　1-2 配置相应的配置文件

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

    /**
     * 公众平台id
     */
    private String mpAppId;

    /**
     * 公众平台密钥
     */
    private String mpAppSecret;

    /**
     * 开放平台id
     */
    private String openAppId;

    /**
     * 开放平台密钥
     */
    private String openAppSecret;

    /**
     * 商户号
     */
    private String mchId;

    /**
     * 商户密钥
     */
    private String mchKey;

    /**
     * 商户证书路径
     */
    private String keyPath;

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

    /**
     * 微信模版id
     */
    private Map<String, String> templateId;
}

　　1-3开放平台文件配置

@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;
    }
}

　　1-4 controller,并配置同意的Url配置文件

url配置文件

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

    /**
     * 微信公众平台授权url
     */
    public String wechatMpAuthorize;

    /**
     * 微信开放平台授权url
     */
    public String wechatOpenAuthorize;

    /**
     * 点餐系统
     */
    public String sell;
}

　　项目配置文件

projectUrl:
  wechatMpAuthorize: http://sell.natapp4.cc
  wechatOpenAuthorize: http://sell.natapp4.cc
  sell: http://sell.natapp4.cc

　　

@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));
        return "redirect:" + redirectUrl;
    }
 @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;
    }
}

　　2.登陆

2-1controller创建登陆方法

　　步骤://1. openid去和数据库里的数据匹配

　　　　2. 设置token至redis:[

使用redis步骤:

1.引入依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

　　2.在controller里面引入

@Autowired
    private StringRedisTemplate redisTemplate;

　　3.在方法里

redisTepla.opsForValue().set("abc","1111111");//告诉redic调用并set key-value

　　

]

　　　　/3. 设置token至cookie

controller层

注意:uuid过期时间类

/**
 * redis常量
 * Created by 廖师兄
 * 2017-07-30 16:22
 */
public interface RedisConstant {

    String TOKEN_PREFIX = "token_%s";

    Integer EXPIRE = 7200; //2小时
}

　　cookie常量类

public interface CookieConstant {

    String TOKEN = "token";

    Integer EXPIRE = 7200;
}

　　

所需

public class CookieUtil {

    /**
     * 设置
     * @param response
     * @param name
     * @param value
     * @param maxAge
     */
    public static void set(HttpServletResponse response,
                           String name,
                           String value,
                           int maxAge) {
        Cookie cookie = new Cookie(name, value);
        cookie.setPath("/");
        cookie.setMaxAge(maxAge);
        response.addCookie(cookie);
    }

　　

@Controller
@RequestMapping("/seller")
public class SellerUserController {

    @Autowired
    private SellerService sellerService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private ProjectUrlConfig projectUrlConfig;

    @GetMapping("/login")
    public ModelAndView login(@RequestParam("openid") String openid,
                              HttpServletResponse response,
                              Map<String, Object> map) {

        //1. openid去和数据库里的数据匹配
        SellerInfo sellerInfo = sellerService.findSellerInfoByOpenid(openid);
        if (sellerInfo == null) {
            map.put("msg", ResultEnum.LOGIN_FAIL.getMessage());
            map.put("url", "/sell/seller/order/list");
            return new ModelAndView("common/error");
        }

        //2. 设置token至redis
        String token = UUID.randomUUID().toString();//uuid通用唯一识别码
        Integer expire = RedisConstant.EXPIRE;//uuid过期时间

        redisTemplate.opsForValue().set(String.format(RedisConstant.TOKEN_PREFIX, token), openid, expire, TimeUnit.SECONDS);

        //3. 设置token至cookie
        CookieUtil.set(response, CookieConstant.TOKEN, token, expire);

        return new ModelAndView("redirect:" + projectUrlConfig.getSell() + "/sell/seller/order/list");

    }
}

　3.退出登陆

思路:清楚redis存值和cookie  步骤:1)从cookie里面查询 2).清除redis 3).清除cookie

查询cookie

public class CookieUtil {
/**
     * 获取cookie
     * @param request
     * @param name
     * @return
     */
    public static Cookie get(HttpServletRequest request,
                           String name) {
        Map<String, Cookie> cookieMap = readCookieMap(request);
        if (cookieMap.containsKey(name)) {
            return cookieMap.get(name);
        }else {
            return null;
        }
    }

    /**
     * 将cookie封装成Map
     * @param request
     * @return
     */
    private static Map<String, Cookie> readCookieMap(HttpServletRequest request) {
        Map<String, Cookie> cookieMap = new HashMap<>();
        Cookie[] cookies = request.getCookies();
        if (cookies != null) {
            for (Cookie cookie: cookies) {
                cookieMap.put(cookie.getName(), cookie);
            }
        }
        return cookieMap;
    }
}

　　controller层方法

@GetMapping("/logout")
    public ModelAndView logout(HttpServletRequest request,
                       HttpServletResponse response,
                       Map<String, Object> map) {
        //1. 从cookie里查询
        Cookie cookie = CookieUtil.get(request, CookieConstant.TOKEN);
        if (cookie != null) {
            //2. 清除redis
            redisTemplate.opsForValue().getOperations().delete(String.format(RedisConstant.TOKEN_PREFIX, cookie.getValue()));

            //3. 清除cookie
            CookieUtil.set(response, CookieConstant.TOKEN, null, 0);
        }

        map.put("msg", ResultEnum.LOGOUT_SUCCESS.getMessage());
        map.put("url", "/sell/seller/order/list");
        return new ModelAndView("common/success", map);
    }