如果使用bootstrap 4和SASS (+ bootstrap变量)，您可以使用以下简化的答案:

@each $breakpoint in map-keys($grid-breakpoints) {
  $infix: breakpoint-infix($breakpoint, $grid-breakpoints);

  .col#{$infix}-fifth {
    @extend %grid-column;
  }

  @include media-breakpoint-up($breakpoint, $grid-breakpoints) {
    .col#{$infix}-fifth {
      flex: 0 0 20%;
      max-width: 20%;
    }
  }
}

还支持断点，您可以简单地添加新的.col#{$infix}-xxx类

保持原始的12列引导，不要自定义它。你唯一需要做的修改是一些css之后的原始引导响应css，像这样:

下面的代码已经为Bootstrap 2.3.2进行了测试:

<style type="text/css">
/* start of modification for 5 columns */
@media (min-width: 768px){
    .fivecolumns .span2 {
        width: 18.297872340425532%;
        *width: 18.2234042553191494%;
    }
}
@media (min-width: 1200px) {
    .fivecolumns .span2 {
        width: 17.9487179487179488%;
        *width: 17.87424986361156592%;
    }
}
@media (min-width: 768px) and (max-width: 979px) {
    .fivecolumns .span2 {
        width: 17.79005524861878448%;
        *width: 17.7155871635124022%;
    }
}
/* end of modification for 5 columns */
</style>

和html:

<div class="row-fluid fivecolumns">
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec id elit non mi porta gravida at eget metus. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus. Etiam porta sem malesuada magna mollis euismod. Donec sed odio dui. </p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
    <div class="span2">
        <h2>Heading</h2>
        <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
        <p><a class="btn" href="#">View details &raquo;</a></p>
    </div>
</div>

注意:即使span2乘以5不等于12列，你明白了吧:)

可以在这里找到一个工作示例http://jsfiddle.net/v3Uy5/6/

引导4

我看了所有的答案，没有找到“显而易见的答案”。基本上，您需要做的是选取任何自举列(例如col-2)并编辑一些值。在这个例子中，我使用的是.col-custom类。

5个相等的列表示每个列占用20%，因此:flex:0 0 20%和max-width:20%。同样的方法，你可以创建其他数量的列(7,9,11,84或任何你想要的)。

您可以创建自定义宽度的CSS变量，并在项目中使用它。就像这样:

:root {
  --col-custom: 20%;
}

.col-custom {
  flex: 0 0 var(--col-custom);
  max-width: var(--col-custom);
}

工作的例子:

.col-custom, .col-sm-custom, .col-md-custom, .col-lg-custom, .col-xl-custom { position: relative; width: 100%; padding-right: 15px; padding-left: 15px; } .col-custom { flex: 0 0 20%; max-width: 20%; } @media (min-width: 576px){ .col-sm-custom { flex: 0 0 20%; max-width: 20%; } } @media (min-width: 768px){ .col-md-custom { flex: 0 0 20%; max-width: 20%; } } @media (min-width: 992px){ .col-lg-custom { flex: 0 0 20%; max-width: 20%; } } @media (min-width: 1200px){ .col-xl-custom { flex: 0 0 20%; max-width: 20%; } } /*DEMO*/ .col-custom,.col-sm-custom,.col-md-custom,.col-lg-custom,.col-xl-custom{height:100px;border:1px red solid} <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <div class="container-fluid"> <div class="row"> <div class="col-sm-custom"></div> <div class="col-sm-custom"></div> <div class="col-sm-custom"></div> <div class="col-sm-custom"></div> <div class="col-sm-custom"></div> </div> </div>

用于引导5或更高版本

可以使用row-cols- class名称。

例如:row-col -1, row-col -5, row-col -lg-5

<div class="container">
  <div class="row row-cols-5">
     // place your all cols here
  </div>
</div>

更多信息请阅读官方文档

最简单的方法是在行中添加row-cols-5。点击这里阅读更多

<div class="container">
  <div class="row row-cols-5">
    <div class="col">Col 1</div>
    <div class="col">Col 2</div>
    <div class="col">Col 3</div>
    <div class="col">Col 4</div>
    <div class="col">Col 5</div>
  </div>
</div>

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.1/dist/css/bootstrap.min.css" rel="stylesheet"> <div class="container"> <div class="row row-cols-5"> <div class="col border bg-primary">Col 1</div> <div class="col border bg-primary">Col 2</div> <div class="col border bg-primary">Col 3</div> <div class="col border bg-primary">Col 4</div> <div class="col border bg-primary">Col 5</div> <div class="col border bg-primary">Col 6</div> <div class="col border bg-primary">Col 7</div> </div> </div>

创建5个类为col-sm-2的元素，并在第一个元素中添加类为col-sm-offset-1

附注:这将不是全宽度的(它将从屏幕的左右略微缩进)

代码应该看起来像这样

<div class="col-sm-2 col-sm-offset-1"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>
<div class="col-sm-2"></div>