table固定列宽，每列超出部分用...代替，鼠标悬停显示全部内容

样式：

  .table td:hover{
       overflow: visible;
       white-space: normal;
   }
    .table td {
        max-width:200px;
        word-wrap: break-word;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        color: #2fa4e7;
    }