1.添加依赖：JustAuth

<dependency>
    <groupId>me.zhyd.oauth</groupId>
    <artifactId>JustAuth</artifactId>
    <version>1.16.6</version>
</dependency>

2.添加 ElephantAuthSource.java

package com.elephant.devops.h5;

import me.zhyd.oauth.config.AuthSource;
import me.zhyd.oauth.request.AuthDefaultRequest;

/**
 * 自定义oauth2.0服务器请求地址
 */
public enum ElephantAuthSource implements AuthSource {
    MengDianE {
        public String authorize() {
            // https://office.impc.com.cn/connect/oauth2/authorize?appid=xxx&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&agentid=AGENTID&state=STATE#wechat_redirect
            return "https://office.impc.com.cn/connect/oauth2/authorize";
        }

        public String accessToken() {
            return "https://office.impc.com.cn/cgi-bin/gettoken";
        }

        public String userInfo() {
            return "https://office.impc.com.cn/cgi-bin/user/getuserinfo";
        }

        public Class<? extends AuthDefaultRequest> getTargetClass() {
            return AuthMengDianRequest.class;
        }
    }
}

3.添加 AuthMengDianRequest.java

/**
 * 企业微信：蒙电E联授权获取用户手机号
 */
@Slf4j
public class AuthMengDianRequest extends AbstractAuthWeChatEnterpriseRequest {

    public AuthMengDianRequest(AuthConfig config) {
        super(config, ElephantAuthSource.MengDianE);
    }

    public AuthMengDianRequest(AuthConfig config, AuthStateCache authStateCache) {
        super(config, ElephantAuthSource.MengDianE, authStateCache);
    }

    public String authorize(String state) {
        return UrlBuilder.fromBaseUrl(this.source.authorize())
                .queryParam("appid", this.config.getClientId())
                .queryParam("agentid", this.config.getAgentId())
                .queryParam("redirect_uri", GlobalAuthUtils.urlEncode(this.config.getRedirectUri()))
                .queryParam("response_type", "code")
                .queryParam("scope", this.getScopes(",", false, AuthScopeUtils.getDefaultScopes(AuthWeChatEnterpriseWebScope.values())))
                .queryParam("state", this.getRealState(state).concat("#wechat_redirect")).build();
    }

    @Override
    public AuthResponse login(AuthCallback authCallback) {
        try {
            //this.checkCode(authCallback);
            //{"accessToken":"...","expireIn":7200,"refreshTokenExpireIn":0,"code":"...","snapshotUser":false}
            AuthToken authToken = this.getAccessToken(authCallback);
            //手机号＝username
            AuthUser user = this.getUserInfo(authToken);
            return AuthResponse.builder().code(AuthResponseStatus.SUCCESS.getCode()).data(user).build();
        } catch (Exception var4) {
            Exception e = var4;
            Log.error("Failed to login with oauth authorization.", e);
            return this.responseError(e);
        }
    }

    protected AuthToken getAccessToken(AuthCallback authCallback) {
        String accessTokenUrl = this.accessTokenUrl(authCallback.getCode());
        log.info(">>>> accessTokenUrl: {}", accessTokenUrl);
        String response = this.doGetAuthorizationCode(accessTokenUrl);
        log.info(">>>> response: {}", response);
        JSONObject object = this.checkResponse(response);
        return AuthToken.builder().accessToken(object.getString("access_token")).expireIn(object.getIntValue("expires_in")).code(authCallback.getCode()).build();
    }

    @Override
    protected AuthUser getUserInfo(AuthToken authToken) {
        String response = this.doGetUserInfo(authToken);
        log.info(">>>>　response = ｛｝", response);
        // {"UserId":"MD_chenhong","DeviceId":"xxx","errcode":0,"errmsg":"ok","usertype":5}
        JSONObject object = this.checkResponse(response);
        if (!object.containsKey("UserId")) {
            throw new AuthException(AuthResponseStatus.UNIDENTIFIED_PLATFORM, this.source);
        } else {
            String userId = object.getString("UserId");
            /* {"errcode":0,"gender":"1","is_leader_in_dept":[0],"direct_leader":[],"userid":"MD_chenhong",
                "english_name":"","enable":1,"qr_code":"https://wwlocal.qq.com/wework_admin/userQRCode?lvc=vc78d250e697f27eba",
                "department":[39246],"email":"","order":[4096],"isleader":0,"mobile":"13580575781","errmsg":"ok","telephone":"",
                "positions":[""],"avatar":"","hide_mobile":0,"country_code":"86","biz_mail_alias":[],"name":"陈鸿","extattr":{"attrs":[]},"position":"",
                "external_profile":{"external_attr":[],"external_corp_name":"内蒙古电力集团"},"status":1}*/
            JSONObject userDetail = this.getUserDetail(authToken.getAccessToken(), userId, null);
            return AuthUser.builder().rawUserInfo(userDetail)
                    .nickname(userDetail.getString("name")).avatar(userDetail.getString("avatar"))
                    .username(userDetail.getString("mobile")).uuid(userId)
                    .gender(AuthUserGender.getWechatRealGender(userDetail.getString("gender")))
                    .token(authToken).source(this.source.toString()).build();
        }
    }

    protected String doGetUserInfo(AuthToken authToken) {
        //https://office.impc.com.cn/cgi-bin/user/getuserinfo?access_token=xxxxx&code=xxx
        String userInfoUrl = this.userInfoUrl(authToken);
        log.info(">>> userInfoUrl = {}", userInfoUrl);
        return HttpUtil.get(userInfoUrl);
        //http请求经常超时有bug
        //return (new HttpUtils(this.config.getHttpConfig())).get(userInfoUrl).getBody();
    }

    AuthResponse responseError(Exception e) {
        int errorCode = AuthResponseStatus.FAILURE.getCode();
        String errorMsg = e.getMessage();
        if (e instanceof AuthException) {
            AuthException authException = (AuthException)e;
            errorCode = authException.getErrorCode();
            if (StringUtils.isNotEmpty(authException.getErrorMsg())) {
                errorMsg = authException.getErrorMsg();
            }
        }
        return AuthResponse.builder().code(errorCode).msg(errorMsg).build();
    }

    private JSONObject checkResponse(String response) {
        JSONObject object = JSONObject.parseObject(response);
        if (object.containsKey("errcode") && object.getIntValue("errcode") != 0) {
            throw new AuthException(object.getString("errmsg"), this.source);
        } else {
            return object;
        }
    }

    private JSONObject getUserDetail(String accessToken, String userId, String userTicket) {
        String userInfoUrl = UrlBuilder.fromBaseUrl("https://office.impc.com.cn/cgi-bin/user/get").queryParam("access_token", accessToken).queryParam("userid", userId).build();
        String userInfoResponse = (new HttpUtils(this.config.getHttpConfig())).get(userInfoUrl).getBody();
        JSONObject userInfo = this.checkResponse(userInfoResponse);
        if (StringUtils.isNotEmpty(userTicket)) {
            String userDetailUrl = UrlBuilder.fromBaseUrl("https://office.impc.com.cn/cgi-bin/auth/getuserdetail").queryParam("access_token", accessToken).build();
            JSONObject param = new JSONObject();
            param.put("user_ticket", userTicket);
            String userDetailResponse = (new HttpUtils(this.config.getHttpConfig())).post(userDetailUrl, param.toJSONString()).getBody();
            JSONObject userDetail = this.checkResponse(userDetailResponse);
            userInfo.putAll(userDetail);
        }
        return userInfo;
    }
}

4.添加 Oauth2Controller.java

@RestController
@RequestMapping("/api/pub/oauth2")
@Api(value = "Oauth2Controller ", tags = "蒙电E家oauth2")
@Slf4j
public class Oauth2Controller extends BaseController {

    @Autowired
    private AuthService authService;

    /**
     * localhost:7061/api/pub/oauth2/render
     * 跳转进入：
     * https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxx&agentid=10xxx&redirect_uri=https://office.impc.com.cn/cgi-bin/gettoken&response_type=code&scope=snsapi_base&state=xxxx#wechat_redirect
     * https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxx&agentid=10xxx&redirect_uri=https://office.impc.com.cn&response_type=code&scope=snsapi_base&state=xxxx#wechat_redirect
     * @param response
     * @throws IOException
     */
    @GetMapping("/render")
    public void renderAuth(HttpServletResponse response) throws IOException {
        AuthRequest authRequest = getAuthRequest();
        response.sendRedirect(authRequest.authorize(AuthStateUtils.createState()));
    }

    /**
     * 查询 state
     * localhost:7061/api/pub/oauth2/getState
     * @return
     */
    @GetMapping("/getState")
    public Result getState() {
        AuthRequest authRequest = getAuthRequest();
        String state = AuthStateUtils.createState();
        String url = authRequest.authorize(state);
        log.debug("url = {}", url);
        return Result.success(state);
    }

    /**
     * localhost:7061/api/pub/oauth2/callback?code=xxx&state=xxx
     * @param callback
     * @return
     */
    @GetMapping("/callback")
    public Result<AuthVO> callback(AuthCallback callback) {
        AuthRequest authRequest = getAuthRequest();
        try {
            AuthResponse response = authRequest.login(callback);
            log.info(">>>> response = {}", JSONUtil.toJsonStr(response));
            int code = response.getCode();
            if(code == 2000) {
                AuthUser data = (AuthUser) response.getData();
                String phone = data.getUsername();
                AuthVO authVO = authService.loginByPhone(phone);
                if(authVO != null) {
                    return Result.success(authVO);
                }else {
                    AuthVO bean = new AuthVO();
                    bean.setToken("-1");
                    return Result.success(bean);
                }
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        return Result.fail("500", "系统异常");
    }

    private AuthRequest getAuthRequest() {
        return new AuthMengDianRequest(AuthConfig.builder()
                .clientId("xxxx")
                .clientSecret("xxxxxxx")
                .redirectUri("https://office.impc.com.cn")
                .agentId("xxxxx")
                .build());
    }

}