1.yii2 advanced 安装，不知道步骤的可以百度

2.讲extjs所需的基本库文件和主题文件放入vender/bower/extjs/ 下

3.新建extjs的资源包管理文件ExtAsset.php ExtRouterAsset.php，前者引入extjs库文件，后者是extjs管理界面的入口（依赖于前者），在site的index视图中引入ExtRouterAsset资源包

ExtAsset.php ：

<?php
/**
 * ExtJs资源管理
 * Created by PhpStorm.
 * User: layho
 * Date: 2016/6/15
 * Time: 19:34
 */
namespace backend\assets;

use yii\web\AssetBundle;


class ExtAsset extends AssetBundle
{
    public $sourcePath  = '@bower/extjs';
    public $css = [
        'theme-crisp-all.css',
    ];
    public $js = [
        'ext-all.js',
        'theme-crisp.js'
    ];

    public $jsOptions = ['position' => \yii\web\View::POS_HEAD];
}

ExtRouterAsset.php :

<?php
/**
 * Extjs项目入口资源包 依赖于extjs资源库
 * Created by PhpStorm.
 * User: layho
 * Date: 2016/6/16
 * Time: 17:22
 */
namespace backend\assets;

use yii\web\AssetBundle;

class ExtRouterAsset extends AssetBundle
{
    public $sourcePath  = '@app/views';
    public $css = [

    ];
    public $js = [
        'Application.js',
        'app.js'
    ];

    public $depends = [
        'backend\assets\ExtAsset'
    ];
}

views/site/index.php

<?php
//Page Title
$this->title = 'OAuth2管理平台';

//引入extjs入口资源
use backend\assets\ExtRouterAsset;
ExtRouterAsset::register($this);

Application.js

/**
 * Created by layho on 2016/6/15.
 */
Ext.Loader.setPath('OAuth2', 'bbb/ccc');
Ext.define('OAuth2.Application', {
    extend : 'Ext.app.Application',

    name : 'OAuth2',

    views : [],
    controllers : [
        'Root'
    ],
    stores : [],

    launch : function() {

    }
});

app.js

/**
 * Created by layho on 2016/6/15.
 */
Ext.Loader.setPath('OAuth2', 'bbb/ccc');
Ext.application({
    name : 'OAuth2',

    extend : 'OAuth2.Application',

    autoCreateViewPort : 'OAuth2.view.main.Main'
});

4.views下的目录结构

待续...........

目前问题：

1."NetworkError: 404 Not Found - http://oauth2.layho.com/app/controller/Root.js?_dc=1466075219928"