首先需要在微信公眾平臺申請賬號並在微信公眾平臺->設定->公眾號設定->功能設定中設定或者在平臺下介面許可權->網頁許可權->網頁授權中設定授權域名。跳轉到授權頁面的url：https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect
需要問自己拼接url,其中redirect_url為授權域名下的連線地址，用於獲取code並進行獲取openid的後臺實現，redirect地址需要進行urlecode，scope中引數：snsapi_base （不彈出授權頁面，直接跳轉，只能獲取使用者openid），snsapi_userinfo （彈出授權頁面，可通過openid拿到暱稱、性別、所在地。並且， 即使在未關注的情況下，只要使用者授權，也能獲取其資訊 ）
跳轉頁面中的處理程式碼：

@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) {
        //獲取openid和access_token的連線
        String getOpenIdUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=APPSECRET&code=CODE&grant_type=authorization_code";
        //獲取返回的code
        String requestUrl = getOpenIdUrl.replace
 
("CODE", code);
        HttpClient httpClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(requestUrl);
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        //向微信傳送請求並獲取response
        String response = httpClient.execute(httpGet,responseHandler);
        System.out.println("=========================獲取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("=======================使用者access_token==============");
        System.out.println(access_token);
        System.out.println(openId);
        //獲取使用者基本資訊的連線
        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);
        //微信那邊採用的編碼方式為ISO8859-1所以需要轉化
        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();
        //性別  1 男  2 女  0 未知
        Integer sex = jsonObject1.get("sex").getAsInt();
        System.out.println("暱稱"+nickname);
        System.out.println("城市"+city);
        System.out.println("省"+province);
        System.out.println("國家"+country);
        System.out.println("頭像"+headimgurl);
        System.out.println("性別"+sex);
        System.out.println(userInfo);
    }
        return "ok";
    }
    }