手把手教学微信公众号通过网页授权获取用户信息openid

妖狐艹你老母 2023-01-05 15:29 226阅读 0赞

官方文档[https://developers.weixin.qq.com/doc/offiaccount/OA\_Web\_Apps/Wechat\_webpage\_authorization.html][https_developers.weixin.qq.com_doc_offiaccount_OA_Web_Apps_Wechat_webpage_authorization.html]

![20210113124952207.png][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 1][]

txt文件放在服务器nginx的html文件夹

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 2][]

### 如果我们的访问路径带了前缀怎么办? ###

### 比如nginx要匹配/xxx, 或者springboot的context-path=/xxx. 别慌,可以先临时的去掉这些前缀,等网页授权域名保存通过后再恢复前缀.微信这个验证只验证一次! ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 3][]

获取用户信息的代码

<dependency>
                <groupId>com.github.binarywang</groupId>
                <artifactId>weixin-java-mp</artifactId>
                <version>${weixin-java-mp.version}</version>
            </dependency>

/**
     * @author jiangli
     * @since 2021/1/12 15:04
     */
    @Controller
    @RequestMapping("/weChat")
    @RequiredArgsConstructor(onConstructor = @__(@Autowired))
    public class WxMpUserController {
        private final WxMpService wxMpService;
    
        /**
         * 微信回调方法
         * 网页授权步骤
         * 1 第一步：用户同意授权，获取code
         * 2 第二步：通过code换取网页授权access_token
         * 3 第三步：刷新access_token（如果需要）
         * 4 第四步：拉取用户信息
         */
        @GetMapping("/getCode")
        @ResponseBody
        public String getCode(String code, String state) throws Exception {
            // 构造网页授权url,用户在微信中点击的链接,redirect_uri需要urlEncode处理
    //        String url = wxMpService.oauth2buildAuthorizationUrl("http://xx.xxx.cn/wx/weChat/getCode", WxConsts.OAuth2Scope.SNSAPI_USERINFO, "jiangli");
    //        System.out.println(url);
    //        return url;
            //1 第一步：用户同意授权，获取code
            //2 第二步：通过code换取网页授权access_token
            WxMpOAuth2AccessToken wxMpOAuth2AccessToken = wxMpService.oauth2getAccessToken(code);
            //4 第四步：拉取用户信息(需scope为 snsapi_userinfo)
            WxMpUser wxMpUser = wxMpService.oauth2getUserInfo(wxMpOAuth2AccessToken, null);
            return wxMpUser.toString();
        }
    
    }

返回结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 4][]

[https_developers.weixin.qq.com_doc_offiaccount_OA_Web_Apps_Wechat_webpage_authorization.html]: https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_webpage_authorization.html
[20210113124952207.png]: https://img-blog.csdnimg.cn/20210113124952207.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70]: /images/20221119/9d25c7bbaf1c4b41b7633cd1852cc92b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210113125142229.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20210113125251966.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20210119201842372.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20210113130008161.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5OTQwMjA1,size_16,color_FFFFFF,t_70