你可以使用jQuery来处理这个问题:

$(function() {
    /**
     * Read the size of the window and reposition the footer at the bottom.
     */
    var stickyFooter = function(){
        var pageHeight = $('html').height();
        var windowHeight = $(window).height();
        var footerHeight = $('footer').outerHeight();

        // A footer with 'fixed-bottom' has the CSS attribute "position: absolute",
        // and thus is outside of its container and counted in $('html').height().
        var totalHeight = $('footer').hasClass('fixed-bottom') ?
            pageHeight + footerHeight : pageHeight;

        // If the window is larger than the content, fix the footer at the bottom.
        if (windowHeight >= totalHeight) {
            return $('footer').addClass('fixed-bottom');
        } else {
            // If the page content is larger than the window, the footer must move.
            return $('footer').removeClass('fixed-bottom');
        }
    };

    // Call when this script is first loaded.
    window.onload = stickyFooter;

    // Call again when the window is resized.
    $(window).resize(function() {
        stickyFooter();
    });
});

HenryW的答案很好，尽管我需要做一些调整才能让它按我想要的方式工作。特别地，下面也处理:

避免“跳跃性”页面加载首先标记不可见和设置在javascript可见 优雅地处理浏览器大小调整 此外，如果浏览器变得更小，页脚变得比页面大，设置页脚备份 高度函数调整

以下是这些调整对我有效的方法:

HTML:

<div id="footer" class="invisible">My sweet footer</div>

CSS:

#footer {
    padding-bottom: 30px;
}

JavaScript:

function setFooterStyle() {
    var docHeight = $(window).height();
    var footerHeight = $('#footer').outerHeight();
    var footerTop = $('#footer').position().top + footerHeight;
    if (footerTop < docHeight) {
        $('#footer').css('margin-top', (docHeight - footerTop) + 'px');
    } else {
        $('#footer').css('margin-top', '');
    }
    $('#footer').removeClass('invisible');
}
$(document).ready(function() {
    setFooterStyle();
    window.onresize = setFooterStyle;
});

#wrap {
min-height: 100%;
height: auto !important;
height: 100%;
width: 100%;
/*Negative indent footer by its height*/
margin: 0 auto -60px;
position: fixed;
left: 0;
top: 0;
}

页脚高度匹配wrap元素的底部缩进的大小。

.footer {
position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 60px;
}

最简单的技术可能是使用Bootstrap navbar-static-bottom，并将主容器div设置为高度:100vh(新的CSS3视图端口百分比)。这将把页脚冲洗到底部。

<main class="container" style="height: 100vh;">
  some content
</main>      
<footer class="navbar navbar-default navbar-static-bottom">
  <div class="container">
  <p class="navbar-text navbar-left">&copy; Footer4U</p>
  </div>
</footer>

发现这里的片段工作得很好

Html:

<div id="wrap">
  <div id="main" class="container clear-top">
    <p>Your content here</p>
  </div>
</div>
<footer class="footer"></footer>

CSS:

html, body {
  height: 100%;
}

#wrap {
  min-height: 100%;
}

#main {
  overflow:auto;
  padding-bottom:150px; /* this needs to be bigger than footer height*/
}

.footer {
  position: relative;
  margin-top: -150px; /* negative value of footer height */
  height: 150px;
  clear:both;
  padding-top:20px;
} 

唯一一个对我有用的!：

html {
  position: relative;
  min-height: 100%;
  padding-bottom:90px;
}
body {
  margin-bottom: 90px;
}
footer {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 90px;
}