你可以试试这个:

你的html代码是这样的:

<div id="container">
  <div id="left"></div>
  <div id="right"></div>
  <div id="center"></div>
</div>

你的CSS代码是这样的:

#container{width:100%;}
#left{float:left;width:100px;}
#right{float:right;width:100px;}
#center{margin:0 auto;width:100px;}

所以，它的输出应该是这样的:

[[LEFT]       [CENTER]        [RIGHT]]

有一些技巧可以用于对齐元素。

01. 使用桌子戏法

.container { 显示:表; ｝ .left { 背景:绿色; 显示:表格单元; 宽度:33.33大众; ｝ .center { 背景:黄金; 显示:表格单元; 宽度:33.33大众; ｝ 铃声{ 背景:灰色; 显示:表格单元; 宽度:33.33大众; ｝ < div class = "容器" > < div class = "左" > 左 < / div > < div class = "中心" > 中心 < / div > < div class = "正确" > 正确的 < / div > < / div >

02. 使用弹性技巧

.container { 显示:flex; justify-content:中心; 对齐项目:中心; ｝ .left { 背景:绿色; 宽度:33.33大众; ｝ .center { 背景:黄金; 宽度:33.33大众; ｝ 铃声{ 背景:灰色; 宽度:33.33大众; ｝ < div class = "容器" > < div class = "左" > 左 < / div > < div class = "中心" > 中心 < / div > < div class = "正确" > 正确的 < / div > < / div >

03. 使用浮动把戏

.left { 背景:绿色; 宽度:100 px; 浮:左; ｝ .center { 背景:黄金; 宽度:100 px; 浮:左; ｝ 铃声{ 背景:灰色; 宽度:100 px; 浮:左; ｝ < div class = "容器" > < div class = "左" > 左 < / div > < div class = "中心" > 中心 < / div > < div class = "正确" > 正确的 < / div > < / div >

CSS网格可以轻松完成工作:

#{容器 显示:网格;/*(1)一个网格容器*/ grid-auto-flow:列;/*(2)列布局*/ justify-content:之间的空间;/*(3)对齐列*/ 背景颜色:浅黄色; ｝ #容器> div { 宽度:100 px; 身高:100 px; 边框:2px红色虚线; ｝ < div id = "容器" > < div > < / div > < div > < / div > < div > < / div > < / div >

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CSS3 Flexbox可以很容易地做到这一点，这个功能将在未来被几乎所有浏览器使用(当<IE9完全死亡时)。

查看浏览器兼容性表

HTML

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

CSS

.container {
  display: flex;
  flex-flow: row nowrap; /* Align on the same line */
  justify-content: space-between; /* Equal margin between the child elements */
}

Output: .container { display: flex; flex-flow: row nowrap; /* Align on the same line */ justify-content: space-between; /* Equal margin between the child elements */ } /* For Presentation, not needed */ .container > div { background: #5F85DB; padding: 5px; color: #fff; font-weight: bold; font-family: Tahoma; } <div class="container"> <div class="left"> Left </div> <div class="center"> Center </div> <div class="right"> Right </div> </div>

HTML:

<div id="container" class="blog-pager">
   <div id="left">Left</div>
   <div id="right">Right</div>
   <div id="center">Center</div>    
</div>

CSS:

 #container{width:98%; }
 #left{float:left;}
 #center{text-align:center;}
 #right{float:right;}

text-align:中心;给予完美的中心对齐。

JSFiddle演示