jstl实现在jsp中动态添加下拉列表项

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使用下面这个jsp的前，你需要写一个Stu类，生成set和get方法。

Public Class Stu{    private int id;    private String name;    public void setId(int id){       this.id=id;    }    public int getId(){       return this.id;    }    public void setName(String name){       this.name=name;    }    public String getName(){       return this.name;    }}

写个简单的servlet

public class gotoMall extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {ArrayList<Stu> stus=new ArrayList<Stu>();Stu stu1=new Stu();stu1.setId(1);stu1.setName("aa");stu2.setId(2);stu2.setName("bb");stus.add(stu1);stus.add(stu2);request.setAttribute("stus", stus);request.getRequestDispatcher("/WEB-INF/admin/my.jsp").forward(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {this.doGet(request, response);}}

my.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!-- 引入jstl标签库 --><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>  <head>    <script type="text/javascript" language="javascript" src="js/js_delete.js" charset="gbk"></script>    <link href="css/main.css" rel="stylesheet" type="text/css" />       <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />     <title>My JSP page</title>  </head>    <body>  LIST:<select>  <!-- 前提是已经把stus这个list放到了request.attribute中. 在servlet或action中  request.setAttribute(stus); -->  <c:forEach items="${stus}" var="stu">  <!-- Stu类中必须有set和get方法 -->     <option>${stu.name}</option>     </c:forEach>  </select>  </body></html>