批處理怎樣將txt里面的文本內容全部轉換成大寫有個文本文檔 1.txt，里面的內容類似如下：
Alibaba Group saw its gross merchandize volume breaking last year's record within half a day after the 24-hour online shopping festival kicked off on Nov 11.The e-commerce giant announced earlier Wednesday its unaudited figure, saying the gross merchandize volume on its Tmall platform reached 57.1 billion yuan ($8.98 billion) at 11:50 am and about 71.61 percent out of the volume generated from mobile channels, such as smartphones and tablets.現在想把這個txt的內容全部轉換成大寫！！！
