div中文字自动换行

<style>

     div

     {

         white-space:normal;

         word-break:break-all;

         word-wrap:break-word;

         }

    </style>

<div style=" width:100px; border:1px solid red">

    I am a doibiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

</div>