加上这一句就可以了

request.setAttribute("page", page);

你看，你req.setattribute  的时候  key  用的名字是messageList   可是你取值的时候是{page.totalPage}   你应该是${messageList .totalPage}  这个样子，你试试吧，不知道有没有帮到你

public class ListServlet extends HttpServlet {

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

    //设置编码

req.setCharacterEncoding("UTF-8");

//接收页面的值

String command = req.getParameter("command");

String description = req.getParameter("description");

String currentPage = req.getParameter("currentPage");

//向页面传值

req.setAttribute("command", command);

req.setAttribute("description", description);

req.setAttribute("currentPage", currentPage);

Page page = new Page();

Pattern pattern = Pattern.compile("[0-9]{1,9}");

if(currentPage == null ||  !pattern.matcher(currentPage).matches()) {

page.setCurrentPage(1);

} else {

page.setCurrentPage(Integer.valueOf(currentPage));

}

//业务处理 查询消息列表并传递给页面

QueryService listServcie = new QueryService();

req.setAttribute("messageList", listServcie.queryMessageList(command, description,page));

//页面跳转

    req.getRequestDispatcher("/WEB-INF/jsp/back/List.jsp").forward(req, resp);

}