如题就是EL表达式不知道为什么接收不到值,request可以
jsp代码:<table align="center" border=1>
<tr>
<td>名称</td><td>城市</td><td>票价</td>
</tr>
<tr>
<td>${name[0]}<%=request.getAttribute("city") %></td><td>${city[0]}</td><td>${price[0]}</td>
</tr>
<tr>
<td>${name[1]}</td><td>${city[1]}</td><td>${price[1]}</td>
</tr>
<tr>
<td>${name[2]}</td><td>${city[2]}</td><td>${price[2]}</td>
</tr>
</table>java代码:package javabean;import java.io.IOException;
import java.util.ArrayList;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class SetAccess extends HttpServlet { /**
*
*/
private static final long serialVersionUID = 1L; @Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
String[] name = { "1-兵马俑", "2-黄帝陵", "3-法门寺" }; ArrayList city = new ArrayList();
city.add("西安");
city.add("高陵");
city.add("宝鸡"); ArrayList price = new ArrayList();
price.add("80");
price.add("20");
price.add("500"); req.setAttribute("name", name);
req.setAttribute("city", city);
req.setAttribute("price", price); RequestDispatcher dispactcher = req.getRequestDispatcher("SetAccess.jsp");//转向SetAccess.jsp
dispactcher.forward(req, resp);
}}
配置文件是:
<servlet>
<display-name>SetAccess</display-name>
<servlet-name>SetAccess</servlet-name>
<servlet-class>javabean.SetAccess</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>SetAccess</servlet-name>
<url-pattern>/SetAccess</url-pattern>
</servlet-mapping>拷过去就可以直接运行,求大家帮助,谢谢
jsp代码:<table align="center" border=1>
<tr>
<td>名称</td><td>城市</td><td>票价</td>
</tr>
<tr>
<td>${name[0]}<%=request.getAttribute("city") %></td><td>${city[0]}</td><td>${price[0]}</td>
</tr>
<tr>
<td>${name[1]}</td><td>${city[1]}</td><td>${price[1]}</td>
</tr>
<tr>
<td>${name[2]}</td><td>${city[2]}</td><td>${price[2]}</td>
</tr>
</table>java代码:package javabean;import java.io.IOException;
import java.util.ArrayList;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class SetAccess extends HttpServlet { /**
*
*/
private static final long serialVersionUID = 1L; @Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
String[] name = { "1-兵马俑", "2-黄帝陵", "3-法门寺" }; ArrayList city = new ArrayList();
city.add("西安");
city.add("高陵");
city.add("宝鸡"); ArrayList price = new ArrayList();
price.add("80");
price.add("20");
price.add("500"); req.setAttribute("name", name);
req.setAttribute("city", city);
req.setAttribute("price", price); RequestDispatcher dispactcher = req.getRequestDispatcher("SetAccess.jsp");//转向SetAccess.jsp
dispactcher.forward(req, resp);
}}
配置文件是:
<servlet>
<display-name>SetAccess</display-name>
<servlet-name>SetAccess</servlet-name>
<servlet-class>javabean.SetAccess</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>SetAccess</servlet-name>
<url-pattern>/SetAccess</url-pattern>
</servlet-mapping>拷过去就可以直接运行,求大家帮助,谢谢
<%@ page language="java" pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<c:forEach items="${city}" var="a">
${a}
</c:forEach>
</body>
</html>如果代码不好使的 可以加我 QQ 250610578 一起探讨 我也是初学者
因为EL是jsp2.0的技术,所以我怀疑是你的中间件问题,如果你用的是tomcat的话,你应该用tomcat5.0以上版本。jdk5.0以上版本。jsp源码:
<table align="center" border=1>
<tr>
<td>
名称
</td>
<td>
城市
</td>
<td>
票价
</td>
</tr>
<tr>
<td>
${name[0]}
</td>
<td>
${city[0]}
</td>
<td>
${price[0]}
</td>
</tr>
<tr>
<td>
${name[1]}
</td>
<td>
${city[1]}
</td>
<td>
${price[1]}
</td>
</tr>
<tr>
<td>
${name[2]}
</td>
<td>
${city[2]}
</td>
<td>
${price[2]}
</td>
</tr>
</table>
页面显示源码: <table align="center" border=1>
<tr> <td>
名称
</td>
<td>
城市
</td>
<td>
票价
</td>
</tr> <tr>
<td>
1-兵马俑
</td>
<td>
西安
</td>
<td>
80
</td> </tr>
<tr>
<td>
2-黄帝陵
</td>
<td>
高陵
</td>
<td>
20
</td> </tr>
<tr>
<td>
3-法门寺
</td>
<td>
宝鸡
</td>
<td>
500
</td> </tr>
</table>
我想你理解LZ问题错了,LZ问的是EL无法正常使用,而你却用JSTL标签来取代jsp片段代码,有些答非所问!
更何况,JSTL内的值也是用EL表达式赋值,所以EL无法使用依然解决不了LZ问题。
我怀疑就是中间件(Server)环境上不支持jsp2.0标准!