为什么非要用el判断呢？直接用数据库卡你想显示那条数据不就好了么？
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
List list = new ArrayList()
for(int i = 65i <65 + 40i++) {
list.add((char)i)
}
pageContext.setAttribute("list", list)
%>
<c:forEach var="var" items="${list}" varStatus="vs">
${var } -
<c:if test="${vs.count mod 3 eq 0}">
<br>
</c:if>
</c:forEach>
EL即Expression Language（表达式语言）EL的语法:${ EL exprission }
${ bean.name } 或 ${ bean['name'] }
说白了，EL是用来显示数据的，功能跟<%=表达式%>一样，EL是不需要引入什么东西的
JSTL（JavaServerPages Standard Tag Library）JSP标准标签库
JSTL标准标签库包括核心标签库和SQL标签库，核心标签库常用的是if和forEach
说白了JSTL常实现网页逻辑判断和迭代显示的，需要引入
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
只要JSTL和EL结合，就基本可以让页面再无<% %>jsp代码了。
给你一段我今天考试的代码：
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
String path = request.getContextPath()
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="work.do?method=search" method="post">
<table border="1" align="center" width="50%">
班级：<select name="student.s_class">
<option value="0">全部</option>
<c:forEach var="T_class" items="${requestScope.tClassList}">
<option value="${T_class.c_no}">
${T_class.c_name}
</option>
</c:forEach>
</select>
科目：<select name="student.s_schedule">
<option value="0">全部</option>
<c:forEach var="T_schedule" items="${requestScope.tSchedultList}">
<option value="${T_schedule.s_no}">
${T_schedule.s_name}
</option>
</c:forEach>
</select>
状态<select name="student.s_status">
<option value="0">全部</option>
<option value="1">已处理</option>
<option value="2">未处理</option>
</select>
<input type="submit" value="提交">
</table>
</form>
<c:if test="${requestScope.searchResult==0}">
<h5 align=center>无此数据</h5>
</c:if>
<c:if test="${requestScope.searchResult==1}">
<h3 align=center>查询结果如下</h3>
<table border="1" align="center" width="50%">
<tr>
<th>姓名</th>
<th>班级</th>
<th>科目</th>
<th>成绩/处理</th>
</tr>
<c:forEach var="MainBean" items="${requestScope.mainList}">
<tr>
<td>${MainBean.s_name}</td>
<td>${MainBean.c_name}</td>
<td>${MainBean.ts_name}</td>
<td>
<c:if test="${MainBean.s_status==1}">${MainBean.s_score}</c:if>
<c:if test="${MainBean.s_status==2}"><a href="work.do?method=toPiyue&stuId=${MainBean.id}">批阅</a></c:if>
</td>
</tr>
</c:forEach>
</table></c:if>
</body>
</html>
可能说得不是很清楚，这个多查查资料，多练练手就会了
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