ArrayList中

Question

保存結果集的結果我無法完成，我正在做一個web應用程序的功能。

下面的代碼appearently沒有產生任何錯誤，

//This is the trouver (find) function, code is related to DAO pattern. 
    public ArrayList<Ticket> trouver(int id_employe) throws DAOException { 
    ArrayList<Ticket> liste = new ArrayList<Ticket>(); 
    Connection connexion = null; 
    PreparedStatement preparedStatement = null; 
    ResultSet resultSet = null; 
    Ticket ticket = null; 

    try { 
     connexion = daoFactory.getConnection(); 
     preparedStatement = initialisationRequetePreparee(connexion, SQL_SELECT_PAR_EMP, false, id_employe); 
     resultSet = preparedStatement.executeQuery(); 

     if (resultSet.next()) { 
      ticket = map(resultSet);//map function stores a row's result in a Bean. 
      liste.add(ticket); 
     } 
    } catch (SQLException e) { 
     throw new DAOException(e); 
    } finally { 
     fermeturesSilencieuses(resultSet, preparedStatement, connexion); 
    } 
    return liste; 
} 

通過servlet：

ArrayList<Ticket> lticket = ticketform.recupererTicket(request); 
request.setAttribute("lticket", lticket); 
this.getServletContext().getRequestDispatcher(VUE).forward(request, response); 

錯誤開始顯示出來，當談到的觀點：

org.apache.jasper.JasperException: An exception occurred processing JSP page /ListeTickets.jsp at line 29 
26: </tr> 
27: <c:forEach items="${ requestScope.lticket }" var="mapticket"> 
28: <tr> 
29: <c:forEach items="${mapticket}" var="ticket"> 
30: <td><c:out value="${ ticket.sujet }"/></td> 
31: <td><c:out value="${ ticket.description }"/></td> 
32: <td><c:out value="${ ticket.priorite }"/></td> 
Stacktrace: 
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:588) 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:466) 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) 

長話短說，我有存儲在ArrayList中豆類的列表，需要兩個循環遍歷整個數據，但出現錯誤。

Answer 1

應該只有一個forEach根據你的代碼是：

<c:forEach items="${ lticket }" var="ticket"> 
<tr> 
<td><c:out value="${ ticket.sujet }"/></td> 
<td><c:out value="${ ticket.description }"/></td> 
<td><c:out value="${ ticket.priorite }"/></td> 
</tr> 
</c:forEach>