以下是我对这个问题的最新解决方案。

 /* Sticky footer styles
-------------------------------------------------- */
html {
  position: relative;
  min-height: 100%;
}


body {
  /* Margin bottom by footer height */
  margin-bottom: 60px;
}
.footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  /* Set the fixed height of the footer here */
  height: 60px;
  background-color: #f5f5f5;

  border-top: 1px solid #eee;
  text-align: center;
}

.site-footer-links {
  font-size: 12px;
  line-height: 1.5;
  color: #777;
  padding-top: 20px;
  display: block;
  text-align: center;
  float: center;
  margin: 0;
  list-style: none;
} 

像这样使用它:

<div class="footer">
 <div class="site-footer">
  <ul class="site-footer-links">
        <li>© Zee and Company<span></span></li>
  </ul>
 </div>

</div>

Or

html, body {
  height: 100%;
}
.page-wrap {
  min-height: 100%;
  /* equal to footer height */
  margin-bottom: -142px; 
}
.page-wrap:after {
  content: "";
  display: block;
}
.site-footer, .page-wrap:after {
  height: 142px; 
}
.site-footer {
  background: orange;
}

这个棘手的例子对我不适用。 我的解决方案:

#footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  height: 3em;
}

Html

<footer class="footer navbar-fixed-bottom">
      <div class="container">
        <span class="text-muted">Place sticky footer content here.</span>
      </div>
    </footer>

CSS

.footer {
    position: fixed;
    bottom: 0;
}

简单的 js

if ($(document).height() <= $(window).height()) {
    $("footer").addClass("navbar-fixed-bottom");
}

Update # 1

$(window).on('resize', function() {
    $('footer').toggleClass("navbar-fixed-bottom", $(document).height() <= $(window).height());
});

除了刚才添加的CSS之外，还需要在关闭wrap div之前添加push div

HTML的基本结构是

<div id="wrap"> 
    page content here 
    <div id="push"></div>
</div> <!-- end wrap -->

<div id="footer">
    footer content here
</div> <!-- end footer -->

实时视图 编辑视图

我写我的简化粘脚代码与填充使用LESS。这个答案可能离题了，因为这个问题没有谈到填充，所以如果你有兴趣，可以查看这篇文章了解更多细节。

@footer-padding:      40px;  // Set here the footer padding
@footer-inner-height: 150px; // Set here the footer height (without padding)

/* Calculates the overall footer height */
@footer-height: @footer-inner-height + @footer-padding*2;

html {
 position: relative;
 min-height: 100%;
}
body {
 /* This avoids footer to overlap the page content */
 margin-bottom: @footer-height;
}
footer{
 /* Fix the footer on bottom and give it fixed height */
 position: absolute;
 bottom: 0;
 width: 100%;
 height: @footer-height;
 padding: @footer-padding 0;
}