html页面获取servlet里集合，怎么实现

Question

javaweb应用求写一个简单的servlet，里面生成一个存有数据的list，在html页面获取到这个list，并展示这个list中的元素，求贴出所有源码

Answer 1

 servlet页面：
package Servlet;
import impl.ContactsDaoImpl;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dao.ContactsDao;
import entity.Contacts;
public class SelectAll extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    doPost(request, response);
}

protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    //处理乱码
    request.setCharacterEncoding("UTF-8");
    response.setCharacterEncoding("UTF-8");
    response.setContentType("text/html;charset=UTF-8");

    //得到httpsession对象
    HttpSession session=request.getSession();

    List list=new ArrayList();
    User u1 = new User();
    u1.setName("jack");
    u1.setAge(20);
    u1.setSex("m");
    list.add(u1);
    session.setAttribute("user", list); 
}
}

jsp:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<c:forEach var="u" items="${user}">
${u.username}
${u.age}
${u.sex}
</c:forEach>