获取企业下所有部门列表

public void getAccessToken() throws ApiException {
        DingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/gettoken");
        OapiGettokenRequest req = new OapiGettokenRequest();
        req.setAppkey("dingxxxxxxxxxhgn");
        req.setAppsecret("9G_xxxxxxxxxxxxxxx1JDf0Qq3nexxxxxxxxGIO");
        req.setHttpMethod("GET");
        OapiGettokenResponse rsp = client.execute(req);
        System.out.println(rsp.getBody());
    }

 public void departmentList() throws ApiException {
        DingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/v2/department/listsub");
        OapiV2DepartmentListsubRequest req = new OapiV2DepartmentListsubRequest();
        req.setDeptId(1L);
        req.setLanguage("zh_CN");
        OapiV2DepartmentListsubResponse rsp = client.execute(req, "access_token");
        System.out.println(rsp.getBody());
    }