APP微信登錄---第三方登錄

（一）引入maven配置

 <dependency>
      <groupId>com.github.liyiorg</groupId>
      <artifactId>weixin-popular</artifactId>
      <version>2.8.5</version>
    </dependency>

(二)編寫controller

• 前端傳遞過來一個code字段，popular框架自主完成以下的操作

  @Controller
  @RequestMapping(value = "/weixin")
  public class WeiXinLogin {
      @Autowired
      private UserService userService;
      //固定
      private String appId="wxf51";
      private String appSecret="34b625fa6afd86693325c84";
  
      //訪問此資源的url:  http://localhost:8090/weixin/wxLogin.json
      @RequestMapping(value = "/wxLogin", produces = MediaType.APPLICATION_JSON_VALUE)
      public void wxreg(ModelMap result,HttpServletRequest request, String code){
          
          //1,獲取憑證信息
          SnsToken token = SnsAPI.oauth2AccessToken(appId, appSecret, code);
          //依據憑證信息判斷用戶是否用微信注冊賬戶？
          String openid = token.getOpenid();
          System.out.println("+++++++++++++++++++++openId=:"+openid);
          User userLogin = new User();
          userLogin.setOpenId(openid);
          userLogin = userService.getUserByExample(userLogin);
          if (userLogin == null){//用戶沒有使用微信注冊過用戶信息
          
              //2,服務器收到用戶的登錄請求，向微信開放平台發送access_token是否有效的驗證請求
              BaseResult baseResult = SnsAPI.auth(token.getAccess_token(), token.getOpenid());
              if("0".equals(baseResult.getErrcode()) && "ok".equals(baseResult.getErrmsg())){
              
                  //3,服務端獲取到新的access_token等信息，並返回給客戶端，客戶端成功登錄或者重新獲取授權。
                  weixin.popular.bean.user.User user = SnsAPI.userinfo(token.getAccess_token(), token.getOpenid(), "zh-CN");
                  System.out.println("user: " + user.toString());
                  result.put("code",200);
                  result.put("msg","成功獲得微信登錄信息");
                  result.put("data",user);
                  User userInSert = new User();
                  //待添加其他屬性
                  userInSert.setOpenId(user.getOpenid());
                  userInSert.setNickname(user.getNickname());
                  userInSert.setSex(user.getSex());
                  userInSert.setProvince(user.getProvince());
                  userInSert.setCountry(user.getCountry());
                  userInSert.setCity(user.getCity());
                  userInSert.setAvatar(user.getHeadimgurl());
                  userInSert.setLoginName(user.getNickname());
                  userService.addUser(userInSert);//添加該用戶到數據庫
                  userInSert = userService.getUserByExample(userInSert);
  
                  System.out.println("+++++++++++++++++++userInsert="+userInSert.toString());
  
                  request.getSession().setAttribute("users",userInSert);
                  result.put("code",200);
                  result.put("msg","微信綁定成功！");
                  result.put("data",userInSert);
              }else{
                  result.put("code",302);
                  result.put("msg","獲得微信登錄用戶失敗");
              }
          }else{
              request.getSession().setAttribute("users",userLogin);
              System.out.println("登錄成功！"+userLogin.toString());
              result.put("code",200);
              result.put("msg","登錄成功！");
              result.put("data",userLogin);
          }
      }
  }