如何使用引导程序在移动设备上显示表格？

All tables within bootstrap stretch according to the container they're in. You can put your tables inside a .span element to control the size. This SO Question may help you out

Why do Twitter Bootstrap tables always have 100% width?

You might also consider trying one of these approaches, since larger tables aren't exactly friendly on mobile even if it works:

http://elvery.net/demo/responsive-tables/

I'm partial to 'No More Tables' but that obviously depends on your application.

Bootstrap 3 introduces responsive tables:

<div class="table-responsive">
<table class="table">
...
</table>
</div>

Bootstrap 4 is similar, but with more control via some new classes:

...responsive across all viewports ... with .table-responsive. Or, pick a maximum breakpoint with which to have a responsive table up to by using .table-responsive{-sm|-md|-lg|-xl}.

Credit to Jason Bradley for providing an example:

After researching for almost 1 month i found the below code which is working very beautifully and 100% perfectly on my website. To check the preview how it is working you can check from the link. https://www.jobsedit.in/state-government-jobs/

and

https://www.jobsrob.in/category/central-government-jobs/

CSS CODE-----

@media only screen and (max-width: 500px)  {
.resp table  {
display: block ;
}
.resp th  {
position: absolute;
top: -9999px;
left: -9999px;
display:block ;
}
.resp tr {
border: 1px solid #ccc;
display:block;
}
.resp td  {
/* Behave  like a "row" */
border: none;
border-bottom: 1px solid #eee;
position: relative;
width:100%;
background-color:White;
text-indent: 50%;
text-align:left;
padding-left: 0px;
display:block;
}
.resp  td:nth-child(1)  {
border: none;
border-bottom: 1px solid #eee;
position: relative;
font-size:20px;
text-indent: 0%;
text-align:center;
}
.resp td:before  {
/* Now like a table header */
position: absolute;
/* Top/left values mimic padding */
top: 6px;
left: 6px;
width: 45%;
text-indent: 0%;
text-align:left;
white-space: nowrap;
background-color:White;
font-weight:bold;
}
/*
Label the data
*/
.resp td:nth-of-type(2):before  { content: attr(data-th) }
.resp td:nth-of-type(3):before  { content: attr(data-th) }
.resp td:nth-of-type(4):before  { content: attr(data-th) }
.resp td:nth-of-type(5):before  { content: attr(data-th) }
.resp td:nth-of-type(6):before  { content: attr(data-th) }
.resp td:nth-of-type(7):before  { content: attr(data-th) }
.resp td:nth-of-type(8):before  { content: attr(data-th) }
.resp td:nth-of-type(9):before  { content: attr(data-th) }
.resp td:nth-of-type(10):before  { content: attr(data-th) }
}

HTML CODE --

<table>
<tr>
<td data-th="Heading 1"></td>
<td data-th="Heading 2"></td>
<td data-th="Heading 3"></td>
<td data-th="Heading 4"></td>
<td data-th="Heading 5"></td>
</tr>
</table>