微信开发——网页授权获取用户基本信息

左手的ㄟ右手 2022-06-18 07:16 366阅读 0赞

请先完成，Token验证，参考上篇文章：[http://blog.csdn.net/sunhuwh/article/details/68925518][http_blog.csdn.net_sunhuwh_article_details_68925518]

请在“测试号管理”中，找到该地方，并配置域名：  
![这里写图片描述][SouthEast]

网页授权获取用户基本信息，分两种方式，  
一种是静默（只能获取open\_id（每个微信只有一个），用户直接进入网站）；  
一种是需要网页授权的，意思是用户不能直接进入网站，要用户授权后，才能进入网站。这种方式可以获取到用户的很多信息，微信昵称，等等。

开发方式一样，现在拿静默模式做栗子。  
首先，我们确定授权后访问的是什么地址，打个比方，处理授权的URL是[http://www.sunhuwh.online/auth/][http_www.sunhuwh.online_auth]（随便写的，不用理会）

@Controller
    public class IndexController {
    
        @Autowired
        private VoteService voteService;
    
        @Autowired
        private RestTemplate restTemplate;
    
        @Autowired
        private AuthService authService;
    
        //运行该方法，可以获取到我们授权的URL
        public static void main(String[] args) {
            String redirectUrl = "http://www.sunhuwh.online/auth/";
            redirectUrl = URLEncoder.encode(redirectUrl);
            System.out.println(String.format("https://open.weixin.qq.com/connect/oauth2/authorize?appid=%s&redirect_uri=%s&response_type=code&scope=%s&state=%s#wechat_redirect",
                    AuthService.APPID, redirectUrl, AuthService.SCOPE, "xxxx_state"));
        }
    
        @GetMapping(value = "/auth")
        public void auth(HttpServletRequest request, @RequestParam("code") String code, @PathVariable("id") String id) {
            HttpSession session = request.getSession();
            String openId = "";
            String accessToken = "";
            if(Strings.isNullOrEmpty(getSessionValueByKey(session, Constants.SESSION_OPEN_ID))){
            //通过这个code获取access_token
                Map<String, String> result = authService.getUserInfoAccessToken(code);
                if(result == null){
                    System.out.println("result is NUll");
                }
                openId = result.get("openid");
                accessToken = result.get("access_token");
                if(Strings.isNullOrEmpty(openId)){
                    System.out.println("openId is NUll");
                }
                session.setAttribute(Constants.SESSION_OPEN_ID, openId);
                session.setAttribute(Constants.SESSION_ACCESS_TOKEN, accessToken);
                System.out.println("success openid");
            }else{
                openId = getSessionValueByKey(session, Constants.SESSION_OPEN_ID);
                accessToken = getSessionValueByKey(session, Constants.SESSION_ACCESS_TOKEN);
                System.out.println("success openid");
            }
        }
    
    }

Constants.java

public final class Constants { 
        /** * 所有都是UTF-8编码 */
        public static final Charset UTF_8 = Charset.forName("UTF-8");
    
        public static final String SESSION_OPEN_ID = "openid";
    
        public static final String SESSION_ACCESS_TOKEN = "accessToken";
    
    }

如果是非静默方式，要获取用户信息：

/** * 获取用户信息 * * @param accessToken * @param openId * @return */
        public Map<String, String> getUserInfo(String accessToken, String openId) {
            Map<String, String> data = Maps.newHashMap();
            String url = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openId + "&lang=zh_CN";
            try {
                String response = restTemplate.getForObject(url, String.class);
                Gson token_gson = new Gson();
                Map userInfo = token_gson.fromJson(response, Map.class);
                System.out.println("get userinfo success. [result={}]"+userInfo);
                data.put("openid", userInfo.get("openid").toString().replaceAll("\"", ""));
                data.put("nickname", userInfo.get("nickname").toString().replaceAll("\"", ""));
                data.put("city", userInfo.get("city").toString().replaceAll("\"", ""));
                data.put("province", userInfo.get("province").toString().replaceAll("\"", ""));
                data.put("country", userInfo.get("country").toString().replaceAll("\"", ""));
                data.put("headimgurl", userInfo.get("headimgurl").toString().replaceAll("\"", ""));
            } catch (Exception ex) {
                System.out.println("fail to request wechat user info. [error={}]"+ex);
            }
            return data;
        }

accessToken过期时间为2个小时，  
这里处理很粗暴，使用session来存储openid和accessToken。session过期时长设置为2小时

spring boot配置session过期时长：application.properties中加入server.session-timeout=7200

参考资料：[https://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html][https_mp.weixin.qq.com_wiki_17_c0f37d5704f0b64713d5d2c37b468d75.html]

[http_blog.csdn.net_sunhuwh_article_details_68925518]: http://blog.csdn.net/sunhuwh/article/details/68925518
[SouthEast]: /images/20220618/6588868fb41a49899b274a9905c267c1.png
[http_www.sunhuwh.online_auth]: http://www.sunhuwh.online/auth/
[https_mp.weixin.qq.com_wiki_17_c0f37d5704f0b64713d5d2c37b468d75.html]: https://mp.weixin.qq.com/wiki/17/c0f37d5704f0b64713d5d2c37b468d75.html