Question

当我使用session.setAttribute(-)或request.setAttribute(-)时，我的Servlet不会转发到我的JSP。

只有当session / request.setAttribute（ - ）代码被注释但我需要将数据从Servlet发送到JSP时，才会发送Servlet。谁能告诉我：

我的代码出了什么问题，
为什么使用会话/请求会阻止转发？

的Servlet

protected void doPost(HttpServletRequest request, HttpServletResponse response) 
                                            throws ServletException, IOException 
{

    //1 - Get bank transaction records : transacRecords is a ResulSet object to be     used in the JSP

    transacRecords=getTransactionRecords();

    //2 - Put them in a session object
    //HttpSession session = request.getSession(true);
    //session.setAttribute("BankTransaction", transacRecords);
    //request.setAttribute("BankTransaction", transacRecords);

    //3 - Forward to bank transaction view
    RequestDispatcher dispatcher = request.getRequestDispatcher("/viewBanqueTransaction.jsp");
    dispatcher.forward(request,response);  
}

viewBanqueTransaction.jsp

<%@ page language="java" session="true"%>
<%@ page language="java" import="java.util.*"%>
<%@ page language="java" import="java.sql.ResultSet"%>

<%
  ResultSet BankTransaction = (ResultSet)request.getAttribute("BankTransaction");
%>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<body> 
 Hello world !! 
</body>
</html>

Answer 1

由于“BalusC”评论，问题解决了。将ResultSet放在请求对象中是原因。 Meaby因为这种对象指向DB。所以，当我把一个字符串向前推进时。谢谢大家的意见。

此帖子了解更多信息Resultset in session

调用session.setAttribute或request.setAttribute时，Servlet不转发到jsp

1 个答案: