code: async function loadRoute ( dir )
  {
  return new Promise( async function(resolve, reject){
      // 扫描 js 文件，绝对路径
      let files = await scanFile ( path.join(dir_app, './'+dir), 'js', true );
  
      let whole_router;
      // 加载执行
      files.forEach(function( f ){
          let mod = require(f)
            , name = path.basename(f, '.js');
          // 执行
          let router = mod(app.Context);
          router.__renderForContext(app.Context); // 输出至app上下文
      });
  
      // app.Context.Log('yangjie');    
  
      // ok
      resolve();
  
  });
  }
docs: 加载路由