//1 设置所需的参数
WxmpConfiguration wxmpConfiguration = new WxmpConfiguration();
wxmpConfiguration.setAppid(AppId.appid);
wxmpConfiguration.setAppsecret(AppId.appsecret);

//2 获取动态代理对象实例
WxmpSessionFactoryBuilder builder = new WxmpSessionFactoryBuilder();
WxmpSessionFactory factory = builder.build(wxmpConfiguration);
WxmpSession wxmpSession = factory.openSession();
IMenuApi menuApi = wxmpSession.getMapper(IMenuApi.class);

//3 获取自定义菜单数据并打印
MenuWapperBean menu = menuApi.getMenu();
System.out.println(JSON.toJSONString(menu));