java实现微信授权获取用户openid及授权用户相关信息

Love The Way You Lie 2022-06-02 08:41 404阅读 0赞

首先需要在微信公众平台申请账号并在微信公众平台->设置->公众号设置->功能设置中设置或者在平台下接口权限->网页权限->网页授权中设置授权域名。跳转到授权页面的url：https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect\_uri=REDIRECT\_URI&response\_type=code&scope=SCOPE&state=STATE\#wechat\_redirect  
需要问自己拼接url,其中redirect\_url为授权域名下的连接地址，用于获取code并进行获取openid的后台实现，redirect地址需要进行urlecode，scope中参数：snsapi\_base （不弹出授权页面，直接跳转，只能获取用户openid），snsapi\_userinfo （弹出授权页面，可通过openid拿到昵称、性别、所在地。并且， 即使在未关注的情况下，只要用户授权，也能获取其信息 ）  
跳转页面中的处理代码：

@Namespace("/weixinInfo")
    @Results({@Result(name = "ok", location = "/index.jsp"),})
    public class GetUserOpenAction extends OutInterfaceAction{
    	private static final long serialVersionUID = 1L;
    	
    	@Action("getCode")
    	public String getCode() throws ClientProtocolException, IOException{
    	String code =	request.getParameter("code");
    	System.out.println(code);
    	if (code != null) {
    		//获取openid和access_token的连接
    		String getOpenIdUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=APPSECRET&code=CODE&grant_type=authorization_code";
    		//获取返回的code
    		String requestUrl = getOpenIdUrl.replace("CODE", code);
    		HttpClient httpClient = new DefaultHttpClient();
    		HttpGet httpGet = new HttpGet(requestUrl);
    		ResponseHandler<String> responseHandler = new BasicResponseHandler();
    		//向微信发送请求并获取response
    		String response = httpClient.execute(httpGet,responseHandler);
    		System.out.println("=========================获取token===================");
    		System.out.println(response);
    		JsonParser parser = new JsonParser();
    		JsonObject jsonObject = (JsonObject) parser.parse(response);
    		String access_token = jsonObject.get("access_token").getAsString();
    		String openId = jsonObject.get("openid").getAsString();
    		System.out.println("=======================用户access_token==============");
    		System.out.println(access_token);
    		System.out.println(openId);
    		//获取用户基本信息的连接
    		String getUserInfo = "https://api.weixin.qq.com/sns/userinfo?  access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";
    		String userInfoUrl = getUserInfo.replace("ACCESS_TOKEN", access_token).replace("OPENID", openId);
    		HttpGet httpGetUserInfo = new HttpGet(userInfoUrl);
    		String userInfo = httpClient.execute(httpGetUserInfo,responseHandler);
    		//微信那边采用的编码方式为ISO8859-1所以需要转化
    		String json = new String(userInfo.getBytes("ISO-8859-1"),"UTF-8");
    		System.out.println("====================userInfo==============================");
    		JsonObject jsonObject1 = (JsonObject) parser.parse(json);
    		String nickname = jsonObject1.get("nickname").getAsString();
    		String city = jsonObject1.get("city").getAsString();
    		String province = jsonObject1.get("province").getAsString();
    		String country = jsonObject1.get("country").getAsString();
    		String headimgurl = jsonObject1.get("headimgurl").getAsString();
    		//性别  1 男  2 女  0 未知
    		Integer sex = jsonObject1.get("sex").getAsInt();
    		System.out.println("昵称"+nickname);
    		System.out.println("城市"+city);
    		System.out.println("省"+province);
    		System.out.println("国家"+country);
    		System.out.println("头像"+headimgurl);
    		System.out.println("性别"+sex);
    		System.out.println(userInfo);
    	}
    		return "ok";
    	}
    	}

后台打印的结果：  
![这里写图片描述][20191113090739946.png]  
由于是测试代码，没有对两次的返回参数进行封装，可以对参数封装进行相应的存储  
微信[官网的文档][Link 1]：https://mp.weixin.qq.com/wiki?t=resource/res\_main&id=mp1421140842

[20191113090739946.png]: /images/20220602/79b5e64e1c1843c3a81ab76c5890885e.png
[Link 1]: https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140842