jsp页面request.getAttribute("List") 为null

Question

servlet页面直接运行可以出结果，但从jsp页面就是Null
这是servlet页面

public class FindServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    try {
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/db_java?serverTimezone=GMT";
        String username = "root";
        String password = "root";
        Connection conn = DriverManager.getConnection(url,username,password);
        Statement stmt = conn.createStatement();
        String sql = "select * from tb_servent";
        ResultSet rs = stmt.executeQuery(sql);
        List<Servent> list = new ArrayList<Servent>();
        while(rs.next()){
            Servent servent = new Servent();
            servent.setId(rs.getInt("id"));
            servent.setName(rs.getString("name"));
            list.add(servent);
        }
        request.setAttribute("list", list);
        rs.close(); 
        stmt.close();   
        conn.close();   
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    } catch (SQLException e) {
        e.printStackTrace();
    }
        request.getRequestDispatcher("index.jsp").forward(request, response);
}

}

这是jsp页面

List< Servent> list = (List< Servent>)request.getAttribute("list");

请各位大神帮帮忙

Answer 1

你把request换成Map集合进行存储 在前台使用EL表达式获取值 ${键名}