java获取微信用户信息(UnionID)

快来打我* 2022-02-26 01:16 1000阅读 1赞

本篇主要是针对用户关注公众号 然后利用接口获取用户的信息包括unionid信息

首先就是获取微信access\_token的值，官方文档:[https://mp.weixin.qq.com/wiki?t=resource/res\_main&id=mp1421140183][https_mp.weixin.qq.com_wiki_t_resource_res_main_id_mp1421140183]

然后调用获取用户信息接口url:[https://api.weixin.qq.com/cgi-bin/user/info?access\_token=ACCESS\_TOKEN&openid=OPENID&lang=zh\_CN][https_api.weixin.qq.com_cgi-bin_user_info_access_token_ACCESS_TOKEN_openid_OPENID_lang_zh_CN]

下面贴代码

// 获取access_token 如果看不懂可看:https://blog.csdn.net/lady132/article/details/88871049
    			String access_token = AccessTokenInfo.accessToken.getAccessToken();
    			// 通过前端code参数得到code
    			String code = request.getParameter("code");
    			// 获取用户的openid  APPID 和code 就是微信公众号的账号信息
    			String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + APPID + "&secret=" + SECRET
    					+ "&code=" + code + "&grant_type=authorization_code";
    
    			// 调用请求方法
    			String json = urlToJson(url);
    			// 转换为json格式
    			JSONObject json1 = JSONObject.parseObject(json.toString());
    
    			try {
    				// 获取用户的openid
    				String open_id = json1.get("openid").toString();
    
    				// 获取用户基本信息(用户必须以关注公众号) 用户授权请求的地址:
    				// https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN
    				// 关注公众号获取用户unionid:https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN
    				url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" + access_token + "&openid=" + open_id
    						+ "&lang=zh_CN";
    				//获取返回的用户信息
    				json = urlToJson(url);
    				//打印用户信息
    				System.out.println("公众号用户信息:" + json);
    				
    			} catch (Exception e) {
    				System.out.println(e);
    			}
    
    			/**
    			* 对url发送请求并获取返回的数据
    			 * 
    			 * @param url
    			 * @return
    			 */
    			public String urlToJson(String url) {
    				StringBuffer json1 = new StringBuffer();
    				try {
    					URL oracle = new URL(url);
    					URLConnection yc = oracle.openConnection();
    					BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream(), "utf-8"));
    					String inputLine = null;
    					// StringBuffer json1 = new StringBuffer();
    					while ((inputLine = in.readLine()) != null) {
    						json1.append(inputLine);
    					}
    				} catch (Exception e) {
    					System.out.println(e);
    				}
    				return json1.toString();
    			}

搞定收工！

[https_mp.weixin.qq.com_wiki_t_resource_res_main_id_mp1421140183]: https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140183
[https_api.weixin.qq.com_cgi-bin_user_info_access_token_ACCESS_TOKEN_openid_OPENID_lang_zh_CN]: https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN