html css 如何将表头固定_html/css_WEB-ITnose
position属性取值为fixed时,则元素的位置将不受滚动条的影响,而是直接依据窗口定位,这就是将表头固定的最直接方法,网上其他途径感觉都是在走弯路。但是与此同时必须解决两个问题。第一:表体将随之不依据表头定位,而是依据body元素定位,因此表体将上移,导致表体靠上部分被表头遮挡,而且有重影。第二:表体的宽高和表头的宽高也将互相独立不再受文档流的约束,这导致单元格对不齐。 解决办法示例如下。其中,单元格上下对齐的问题可以通过设置padding margin 百分比width来解决,表头和表体也可以放在各自的div里。 样式单 <style type="text/css"> *{ padding:0px; margin: 0px; } #thead { /*固定表头*/ position:fixed; /* 表头显示层次高于表体,防止空白行和表头重合时出现重影*/ z-index:2; background:#ECECFF; } #spacetr{ /* 空白的tr 用来填补表头遮盖的数据*/ position:relative; z-index:1; } .tdata { /* 显示表格数据的tr */ position:relative; z-index:1; } </style> js脚本 $(function(){ $("#spacetr").css("height",$("#thead").css("height")); //将空白行的高度设置为和表头等高,使被遮挡的数据刚好下移表头高度的距离 }); jsp代码: <div style="width:100%"> <%--<img src="/static/imghw/default1.png" data-src="${pageContext.request.contextPath}/images/post_head.jpg" class="lazy"/ alt="html css 如何将表头固定_html/css_WEB-ITnose" > --%> <table id="table" border="1px gray solid " cellspacing="0" cellpadding="0" width="100%;" > <tr id="thead"> <td width="9%" align="center">招聘学科</td> <c:forEach items="${postnames}" var="postname"> <td valign="bottom" align="center"> ${postname} </td> </c:forEach> </tr> <tr id="spacetr"> <td width="9%"></td> <c:forEach items="${postnames}" var="postname"> <td> </td> </c:forEach> </tr> <c:forEach items="${shcoolsPostnumbers}" var="schoolPostnumbers"> <tr class="tdata"> <td width="9%" >${schoolPostnumbers.key}</td> <c:forEach items="${schoolPostnumbers.value}" var="postnumber"> <td align="center"> ${postnumber} </td> </c:forEach> </tr> </c:forEach> </table> </div>

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