Springboot网站第三方登录 微信登录

网友投稿 326 2023-03-07


Springboot网站第三方登录 微信登录

微信开放平台接入,官网:https://open.weixin.qq.com,在官网注册并添加应用后即可获得APP_ID和APP_SECRET。

步骤一:创建一个继承AuthService的接口,WeChatAuthService,如下

public interface WeChatAuthService extends AuthService {

public jsONObject getUserInfo(String accessToken, String openId);

}

步骤二:WeChatService的具体实现如下

@Service

public class WeChatAuthServiceImpl extends DefaultAuthServiceImpl implements WeChatAuthService {

private Logger logger = LoggerFactory.getLogger(WeChatAuthServiceImpl.class);

//请求此地址即跳转到二维码登录界面

private static final String AUTHORIZATION_URL =

"https://open.weixin.qq.com/connect/qrconnect?appid=%s&redirect_uri=%s&response_type=code&scope=%s&state=%s#wechat_redirect";

// 获取用户 openid 和access——toke 的 URL

private static final String ACCESSTOKE_OPENID_URL =

"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code";

private static final String REFRESH_TOKEN_URL =

"https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=%s&grant_type=refresh_token&refresh_token=%s";

private static final String USER_INFO_URL =

"https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s&lang=zh_CN";

private static final String APP_ID="xxxxxx";

private static final String APP_SECRET="xxxxxx";

private static final String SCOPE = "snsapi_login";

private String callbackUrl = "https://xxx.cn/auth/wechat"; //回调域名

@Override

public String getAuthorizationUrl() throws UnsupportedEncodingException {

callbackUrl = URLEncoder.encode(callbackUrl,"utf-8");

String url = String.format(AUTHORIZATION_URL,APP_ID,callbackUrl,SCOPE,System.currentTimeMillis());

return url;

}

@Override

public String getAccessToken(String code) {

String url = String.format(ACCESSTOKE_OPENID_URL,APP_ID,APP_SECRET,code);

UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);

URI uri = builder.build().encode().toUri();

String resp = getRestTemplate().getForObject(uri, String.class);

logger.error("getAccessToken resp = "+resp);

if(resp.contains("openid")){

JSONObject jsonObject = JSONObject.parseObject(resp);

String access_token = jsonObject.getString("access_token");

String openId = jsonObject.getString("openid");;

JSONObject res = new JSONObject();

res.put("access_token",access_token);

res.put("openId",openId);

res.put("refresh_token",jsonObject.getString("refresh_token"));

return res.toJSONString();

}else{

throw new ServiceException("获取token失败,msg = "+resp);

}

}

//微信接口中,token和openId是一起返回,故此方法不需实现

@Override

public String getOpenId(String accessToken) {

return null;

}

@Override

public JSONObject getUserInfo(String accessToken, String openId){

String url = String.format(USER_INFO_URL, accessToken, openId);

UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);

URI uri = builder.build().encode().toUri();

String resp = getRestTemplate().getForObject(uri, String.class);

logger.error("getUserInfo resp = "+resp);

if(resp.contains("errcode")){

throw new ServiceException("获取用户信息错误,msg = "+resp);

}else{

JSONObject data =JSONObject.parseObject(resp);

JSONObject result = new JSONObject();

result.put("id",data.getString("unionid"));

result.put("nickName",data.getString("nickname"));

result.put("avatar",data.getString("headimgurl"));

return result;

}

}

//微信的token只有2小时的有效期,过时需要重新获取,所以官方提供了

//根据refresh_token 刷新获取token的方法,本项目仅仅是获取用户

//信息,并将信息存入库,所以两个小时也已经足够了

@Override

public String refreshToken(String refresh_token) {

String url = String.format(REFRESH_TOKEN_URL,APP_ID,refresh_token);

UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);

URI uri = builder.build().encode().toUri();

ResponseEntity resp = getRestTemplate().getForEntity(uri,JSONObject.class);

JSONObject jsonObject = resp.getBody();

String access_token = jsonObject.getString("access_token");

return access_token;

}

}

步骤三:

在Controller中调用,代码如下:

@RequestMapping(value = "/wxLoginPage",method = RequestMethod.GET)

public JSONObject wxLoginPage() throws Exception {

String uri = weChatAuthService.getAuthorizationUrl();

return loginPage(uri);

}

@RequestMapping(value = "/wechat")

public void callback(String code,HttpServletRequest request,HttpServletResponse response) throws Exception {

String result = weChatAuthService.getAccessToken(code);

JSONObject jsonObject = JSONObject.parseObject(result);

String access_token = jsonObject.getString("access_token");

String openId = jsonObject.getString("openId");

// String refresh_token = jsonObject.getString("refresh_token");

// 保存 access_token 到 cookie,两小时过期

Cookie accessTokencookie = new Cookie("accessToken", access_token);

accessTokencookie.setMaxAge(60 *2);

response.addCookie(accessTokencookie);

Cookie openIdCookie = new Cookie("openId", openId);

openIdCookie.setMaxAge(60 *2);

response.addCookie(openIdCookie);

//根据openId判断用户是否已经登陆过

KmsUser user = userService.getUserByCondition(openId);

if (user == null) {

response.sendRedirect(request.getContextPath() + "/student/html/index.min.html#/bind?type="+Constants.LOGIN_TYPE_WECHAT);

} else {

//如果用户已存在,则直接登录

response.sendRedirect(request.getContextPath() + "/student/html/index.min.html#/app/home?open_id=" + openId);

}

}

步骤四:

前台js中,先请求auth/wxLoginPage,获取授权地址,等用户授权后会回调/auth/wechat,在此方法中进行逻辑处理即可。

遇到过的坑:

1.在微信官网中配置回调域名的时候,不需要些http或https协议,只需要写上域即可,例如http://baidu.com,只需要填写baidu.com即可,如果是想要跳转到项目下面的某个Controller的某个方法中,如baidu.com/auth/wechat ,配置的时候也只需要配baidu.com,不需要指定后面的auth/wechat,后面的地址在代码中配置回调的地址的时候写上即可,代码中应该配置为https://baidu.com/auth/wechat

2.在跳转到授权二维码界面的时候,会遇到有的时候二维码出不来的状况,这是因为代码中的回调地址的问题,按照上面代码中的方式配置应该是没有问题的


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