APP微信登录---第三方登录

（一）引入maven配置

 <dependency>
      <groupId>com.github.liyiorg</groupId>
      <artifactId>weixin-popular</artifactId>
      <version>2.8.</version>
    </dependency>

(二)编写controller

• 前端传递过来一个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";
  
      //访问此资源的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,获取凭证信息
          SnsToken token = SnsAPI.oauth2AccessToken(appId, appSecret, code);
          //依据凭证信息判断用户是否用微信注册账户？
          String openid = token.getOpenid();
          System.out.println("+++++++++++++++++++++openId=:"+openid);
          User userLogin = new User();
          userLogin.setOpenId(openid);
          userLogin = userService.getUserByExample(userLogin);
          if (userLogin == null){//用户没有使用微信注册过用户信息
  
              //2,服务器收到用户的登录请求，向微信开放平台发送access_token是否有效的验证请求
              BaseResult baseResult = SnsAPI.auth(token.getAccess_token(), token.getOpenid());
              if("0".equals(baseResult.getErrcode()) && "ok".equals(baseResult.getErrmsg())){
  
                  //3,服务端获取到新的access_token等信息，并返回给客户端，客户端成功登录或者重新获取授权。
                  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","成功获得微信登录信息");
                  result.put("data",user);
                  User userInSert = new User();
                  //待添加其他属性
                  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);//添加该用户到数据库
                  userInSert = userService.getUserByExample(userInSert);
  
                  System.out.println("+++++++++++++++++++userInsert="+userInSert.toString());
  
                  request.getSession().setAttribute("users",userInSert);
                  result.put("code",200);
                  result.put("msg","微信绑定成功！");
                  result.put("data",userInSert);
              }else{
                  result.put("code",302);
                  result.put("msg","获得微信登录用户失败");
              }
          }else{
              request.getSession().setAttribute("users",userLogin);
              System.out.println("登录成功！"+userLogin.toString());
              result.put("code",200);
              result.put("msg","登录成功！");
              result.put("data",userLogin);
          }
      }
  }