使用Bootstrap 3我创建了3个等宽的div(在12列布局中，每个div 4列)。 这样，即使左/右部分的宽度不同(如果它们没有溢出列的空间)，您也可以保持中心区域居中。

HTML:

<div id="container">
  <div id="left" class="col col-xs-4 text-left">Left</div>
  <div id="center" class="col col-xs-4 text-center">Center</div>
  <div id="right" class="col col-xs-4 text-right">Right</div>
</div>

CSS:

#container {
  border: 1px solid #aaa;
  margin: 10px;
  padding: 10px;
  height: 100px;
}
.col {
  border: 1px solid #07f;
  padding: 0;
}

CodePen

为了创建没有库的结构，我从Bootstrap CSS复制了一些规则。

HTML:

<div id="container">
  <div id="left" class="col">Left</div>
  <div id="center" class="col">Center</div>
  <div id="right" class="col">Right</div>
</div>

CSS:

* {
  box-sizing: border-box;
}
#container {
  border: 1px solid #aaa;
  margin: 10px;
  padding: 10px;
  height: 100px;
}
.col {
  float: left;
  width: 33.33333333%;
  border: 1px solid #07f;
  padding: 0;
}
#left {
  text-align: left;
}
#center {
  text-align: center;
}
#right {
  text-align: right;
}

科普彭

我喜欢我的杠铃紧而有活力。这是css3和HTML 5

First, setting the Width to 100px is limiting. Don't do it. Second, setting the container's width to 100% will work ok, until were talking about it being a header/footer bar for the whole app, like a navigation or credits/copyright bar. Use right: 0; instead for that scenario. You are using id's (hash #container, #left, etc) instead of classes (.container, .left, etc), which is fine, unless you want to repeat your style pattern elsewhere in your code. I'd consider using classes instead. For HTML, no need to swap order for: left, center, & right. display: inline-block; fixes this, returning your code to something cleaner and logically in order again. Lastly, you need to clear the floats all up so that it doesn't mess with future <div>. You do this with the clear: both;

总结:

HTML:

<div class="container">
  <div class="left"></div>
  <div class="center"></div>
  <div class="right"></div>
  <div class="clear"></div>
</div>

CSS:

.container {right: 0; text-align: center;}

.container .left, .container .center, .container .right { display: inline-block; }

.container .left { float: left; }
.container .center { margin: 0 auto; }
.container .right { float: right; }
.clear { clear: both; }

如果使用HAML和SASS，则有加分项;)

HAML:

.container
  .left
  .center
  .right
  .clear

萨斯:

.container {
  right: 0;
  text-align: center;

  .left, .center, .right { display: inline-block; }

  .left { float: left; }
  .center { margin: 0 auto; }
  .right { float: right; }
  .clear { clear: both; }
}

使用CSS网格

layout { display: grid; grid-template-columns: repeat(3,1fr); } start-column { justify-self: start; } center-column { justify-self: center; } end-column { justify-self: end; } <layout> <start-column> <button>Start</button> </start-column> <center-column> <p>Center Donec non urna ipsum. Nullam euismod, lacus ac malesuada varius, mauris erat ullamcorper erat, eget dignissim tortor felis et sapien. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Morbi faucibus turpis et augue dapibus bibendum.</p> </center-column> <end-column> <a href="#">End</a> </end-column> </layout>

.processList
  text-align: center
  li
  .leftProcess
    float: left
  .centerProcess
    float: none
    display: inline-block
  .rightProcess
    float: right

html
ul.processList.clearfix
  li.leftProcess

li.centerProcess
li.rightProcess

你已经正确地做了，你只需要清除你的浮动。 简单的添加

overflow: auto; 

到容器类。

我做了另一次尝试来简化它，并在不需要容器的情况下实现它。

HTML

<div class="box1">left side of the page</div>
<div class="box2">right side of the page</div>
<div class="box3">center of the page </div>

CSS

      .box1 {
      background-color: #ff0000;
      width: 200px;
      float: left;
    }
    
    .box2 {
      background-color: #00ff00;
      width: 200px;
      float: right;
    }
    
    .box3 {
      background-color: #0fffff;
      width: 200px;
      margin: 0 auto;
    }

你可以在JSFiddle现场看到它