老师你好，我有几个问题想请教一下老师

1.我的showCourse.jsp显示页面不正常，为什么呢？我的jsp页面代码如下

<table border = "1px solid black">
        <tr>
            <td>编号</td>
            <td>课程名称</td>
            <td>所属方向</td>
            <td>课程描述</td>
            <td>创建时间</td>
        </tr>
        <c:forEach items = "${list}"  var = "l">
            <tr>
                 
                    <td>${l.id}</td>
                    <td>${l.name}<td>
                    <td>${l.category}<td>
                    <td>${l.desp}<td>
                    <td>${l.createTime}<td>
                 
            </tr>
        </c:forEach>
    </table>

2.每次添加完只显示存储在list中的数据，而不是数据库中的数据，如何修改？相关页面代码如下：

//addServlet
public class AddCourseServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        String category = request.getParameter("category");
        String desp = request.getParameter("desp");
         
        Course course = new Course(null,name,category,desp,new Date(System.currentTimeMillis()));
         
        CourseService cs = new CourseServiceImpl();
        int i= cs.add(course);
        List list = new ArrayList();
        list.add(course);
        request.setAttribute("list", list);
         
        if(i > 0) {
            request.getRequestDispatcher("showCourse.jsp").forward(request, response);
        }
        else {
            System.out.println("添加失败");
            request.getRequestDispatcher("fail.jsp").forward(request, response);
        }
    }
 
}
 
//queryServlet
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        Connection conn = null;
        PreparedStatement pstmt = null;
        ResultSet res = null;
        boolean flag = false;
         
        List<Course> list = new ArrayList();
        try {
            conn = JDBCUtils.getConnection();
            String sql = "select * from course";
            pstmt = conn.prepareStatement(sql);
             
            res = pstmt.executeQuery();
            while(res.next()) {
                flag = true;
                String id = res.getString("id");
                String name = res.getString("name");
                String category = res.getString("category");
                String desp = res.getString("desp");
                Date createTime = res.getDate("createTime");
                list.add(new Course(id,name,category,desp,createTime));
            }
             
            if(flag) {
                request.getServletContext().setAttribute("list", list);
                request.getRequestDispatcher("showCourse.jsp").forward(request, response);
            }
            else{
                request.getRequestDispatcher("fail.jsp").forward(request, response);
                }
            } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            JDBCUtils.release(res, conn, pstmt);
        }
         
         
    }