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cmd命令窗，先切换到advanced目录下（即有composer.json的文件夹下）
composer update yiisoft/yii2 yiisoft/yii2-composer bower-asset/jquery.inputmask
composer require dmstr/yii2-adminlte-asset "2.*"
composer执行完毕后，advanced/vendor文件夹下情况如下：
2.复制 vendor/dmstr/yii2-adminlte-asset/example-views/yiisoft/yii2-app 到 backend/views/，覆盖