jsp,div 限制字数，超出部分用省略号代替

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1.我是用struts2标签做的：如下：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>博客列表</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/css/main.css"><script type="text/javascript">function goTo(maxPage){var currentPage = document.getElementById("text1").value;if(currentPage>maxPage || currentPage<1){alert("对不起，无法到达该页");}else{document.location.href="<%=request.getContextPath()%>/BlogAction_findAllBlog.action?pageNo="+currentPage;}}</script>
</head>
<body>
<div class="center_division"><div class="center_body"><table id="tb"><%--<tr><td width="15%" bgcolor="#eef0f7">标题</td><td bgcolor="#eef0f7">内容</td></tr>--%><s:iterator value="articleList" var="article"><tr><td align="left" style="padding-left: 20px; font-size: 14px;"><a href="#"><s:property value="#request['articleTitle']"/></a></td></tr><tr><td><s:if test="#request['articleContent'].length()>100"><s:property value="#request['articleContent'].substring(0,100)"/>......</s:if><s:else><s:property value="#request['articleContent']"/>......</s:else>
			</td></tr><tr><td align="right" style="padding-right: 10px;">发布时间：<s:property value="#request['articleCreateDate']"/>  <!-- 更新时间：<s:property value="#request['articleUpdateDate']"/>--></td></tr></s:iterator></table></div>
</div>
</body>
</html>

2.最后的效果截图如下：