PC網站微信第三方登陸

本文用項目架構為spring boot

本文旨在簡介微信第三方登陸的主要步驟，

網站微信第三方登陸需要幾個條件

1.擁有微信開放平台

如果沒有的話需要到https://open.weixin.qq.com/申請

2.進入開放平台，并在網站應用下建立相應的應用

微信官方文檔

https://open.weixin.qq.com/connect/qrconnect?appid=appid&redirect_uri=跳轉連結&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect

生成頁面，掃碼登陸後位址欄會附帶code參數

2.拿到位址欄的code，通過code擷取登陸使用者的資訊

代碼如下：（這裡将第二步和第三部結合到了一起）

/**
     * 擷取微信使用者資訊
     * @param code
     * @return
     */
    @GetMapping("/weixin/userInfo")
    @ResponseBody
    public ResponseEntity<Result> getWeixinUserInfo(@RequestParam(value="code") String code){
        return ResponseEntity.ok().contentType(MediaType.APPLICATION_JSON_UTF8)
                .body(Result.build().content(weixinService.getUserInfo(code)));
    }

/**
 * @author Lichenyi
 * @date 2017-7-5
 */
@SuppressWarnings("all")
@Service("IWeixinService")
public class WeixinService implements IWeixinService {
    private Logger logger = LogManager.getLogger(getClass());

    @Autowired
    private RestTemplate restTemplate;

    @Value("${weixin.open.connect}")
    private String weixin_open_connect;//網站跳轉
    @Value("${weixin.open.sns.oauth2}")
    private String weixin_open_sns_oauth2;//擷取access token
    @Value("${weixin.open.sns.userinfo}")
    private String weixin_open_sns_userinfo;//根據access token 擷取使用者資訊

    /**
     * 擷取access_token
     *
     * @param code
     * @return
     */
    private JSONObject getAccessToken(String code) {
        String tokenJson = null;
        String url = String.format(weixin_open_sns_oauth2, code);
        String resultStr = restTemplate.getForObject(url, String.class);
        JSONObject result = JSONObject.parseObject(resultStr);
        if (result.getString("access_token") != null) {
            return result;
        }
        logger.error(String.format("擷取accesstoken錯誤  %s", result.toJSONString()));
        return result;
    }

    /**
     * 擷取使用者資訊
     *
     * @param code
     * @return
     */
    @Override
    public JSONObject getUserInfo(String code) {
        try {
            JSONObject accessToken = getAccessToken(code);
            if (accessToken.getString("access_token") == null) {
                return accessToken;
            }
            String token = accessToken.getString("access_token");
            String openid = accessToken.getString("openid");
            String url = String.format(weixin_open_sns_userinfo, token, openid);
            String resultStr = restTemplate.getForObject(url, String.class);
            resultStr = new String(resultStr.getBytes("ISO-8859-1"), "UTF-8");
            JSONObject result = JSONObject.parseObject(resultStr);
            if (result.getString("openid") != null) {
                return result;
            }
            logger.error(String.format("擷取使用者資訊錯誤  %s", result.toJSONString()));
            return result;
        }catch (UnsupportedEncodingException e){
            logger.error(String.format("轉碼錯誤  %s", e.getMessage()));
            e.printStackTrace();
        }
        return null;
    }

}

application.properties檔案
server.port=

##微信相關接口
weixin.open.appid=
weixin.open.secret=
weixin.open.redirect_uri=http://m.mjiahome.com/index.html
#生成二維碼的頁面
weixin.open.connect=https://open.weixin.qq.com/connect/qrconnect?appid=${weixin.open.appid}&redirect_uri=${weixin.open.redirect_uri}&response_type=code&scope=snsapi_login&state=STATE#wechat_redirect
weixin.open.sns.oauth2=https://api.weixin.qq.com/sns/oauth2/access_token?appid=${weixin.open.appid}&secret=${weixin.open.secret}&code=%s&grant_type=authorization_code
weixin.open.sns.userinfo=https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s
           

項目最後傳回結果：

{

    "errorCode": ,
    "errorDescription": "success",
    "requestId": "a9026ed2-2986-434c-8762-88deb14cb54d",
    "result": {
        "country": "CN",
        "unionid": "oV6Xy0rmk13eJp_TCOHKOKcbzGFI",
        "province": "Henan",
        "city": "Luoyang",
        "openid": "oe9Uv01iSHLbUR439JUY-nT3Rpbg",
        "sex": ,
        "nickname": "一壺酒",
        "headimgurl": "http://wx.qlogo.cn/mmopen/muJQmcibTZam2heIDTXUseWtwyxiarxFXtACucoib1w5PibiaDun7EJibw6ibfC0z1XxSpmjmickKK0Ms2nwCOezy9WYLp14rH1RhjEib/0",
        "language": "zh_CN",
        "privilege": []
    }
}
           

項目位址:https://github.com/lichenyigit/oauth.weixin.git