幫助Struts動作映射

我的struts應用程序出現問題，它是一個班級註冊應用程序，當用戶點擊「顯示註冊課程」按鈕時，它應該顯示他們註冊的課程，但它顯示目前沒有任何東西。 Struts/Apache不會返回任何錯誤，它只是顯示一個空白頁面，我無法弄清楚原因。在我的struts-config幫助Struts動作映射

我的動作映射：

<action 
     path="/showEnrolled"    
     type="actions.ShowEnrolledAction"   
     name="UserFormEnrolled" 
     scope="request" 
     validate="true"   
     input="/students/StudentMenu.jsp"> 
    <forward 
     name="success" 
     path="/students/enrolled.jsp"/> </action>

我鏈接到JSP頁面enrolled.jsp：

<li><html:form action="/showEnrolled"> 
<html:hidden property="id" value= "<%=request.getRemoteUser()%>"/> <html:submit value = "View Enrolled Classes"/> 
</html:form> </li>

當我點擊的鏈接，我得到什麼，但我的菜單頁。該頁面的文本標題甚至不顯示。

enrolled.jsp：

<%@ page import="javax.sql.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> 

<html:html> 
    <head> 
     <title><bean:message key="app.title" /></title> 
     <html:base /> 
    </head> 
<body> 

    <html:errors /> 
    <h1>Enrolled Courses for <%=request.getRemoteUser() %></h1> 
    <table> 
    <tr> 
     <td valign="top"> 
      <jsp:include page="/students/StudentMenu.jsp"/> 
     </td> 
     <td> 
      <table> 
      <tr> 
       <th>Course Title</th> 
       <th>Course ID</th> 
       <th>Class ID</th> 
       <th>Days</th> 
       <th>Start Time</th> 
       <th>End Time</th> 
       <th>Location</th> 
       <th>Instructor</th> 
      </tr>   
      <%-- -------- Iteration Code -------- --%> 
      <% 
       // Get the studentsRowSet 
       RowSet crsEnrolled = (RowSet) request.getAttribute("crsEnrolled"); 

       // Iterate over the RowSet 
       while (crsEnrolled.next()) { 
      %> 
      <tr> 
       <html:form action="/dropClass"> 
       <td> 
        <input type="hidden" name="title" 
        value="<%=crsEnrolled.getString("title") %>" /> 
        <%=crsEnrolled.getString("title") %> 
       </td> 
           <td> 
        <input type="hidden" name="courseid" 
        value="<%=crsEnrolled.getInt("course_number") %>" /> 
        <%=crsEnrolled.getInt("course_id") %> 
       </td> 
           <td> 
        <input type="hidden" name="classid" 
        value="<%=crsEnrolled.getInt("class_id") %>" /> 
        <%=crsEnrolled.getInt("class_id") %> 
       </td> 
           <td> 
        <input type="hidden" name="days" 
        value="<%=crsEnrolled.getString("date_code") %>" /> 
        <%=crsEnrolled.getString("date_code") %> 
       </td> 
           <td> 
        <input type="hidden" name="start" 
        value="<%=crsEnrolled.getTime("start_time") %>" /> 
        <%=crsEnrolled.getTime("start_time") %> 
       </td> 
           <td> 
        <input type="hidden" name="end" 
        value="<%=crsEnrolled.getTime("end_time") %>" /> 
        <%=crsEnrolled.getTime("end_time") %> 
       </td> 
           <td> 
        <input type="hidden" name="location" 
        value="<%=crsEnrolled.getString("cl_location") %>" /> 
        <%=crsEnrolled.getString("cl_location") %> 
       </td> 
       <td> 
        <input type="hidden" name="instructorfirst" 
        value="<%=crsEnrolled.getString("first_name") %>" /> 
        <%=crsEnrolled.getString("first_name") %> 
        <input type="hidden" name="instructorlast" 
        value="<%=crsEnrolled.getString("instructor_last") %>" /> 
        <%=crsEnrolled.getString("last_name") %> 
       </td> 
        <html:hidden property="classId" value="<%=Integer.toString(crsEnrolled.getInt("class_id"))%>" /> 
        <html:hidden property="stuId" value="<%=request.getRemoteUser() %>" /> 
        <td><html:submit value ="Drop" /></td>     
       </html:form> 
      </tr> 
      <% 
       } 
      %> 
      </table> 
     </td> 
    </tr> 
    </table> 

</body> 
</html:html>

ShowEnrolledAction：

package actions; 

import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
import javax.sql.RowSet; 

import model.EnrollModel; 

import org.apache.struts.action.Action; 
import org.apache.struts.action.ActionForm; 
import org.apache.struts.action.ActionForward; 
import org.apache.struts.action.ActionMapping; 

import db.DbException; 
import forms.UserFormEnrolled; 

public class ShowEnrolledAction extends Action{ 
    public ActionForward execute(ActionMapping mapping, ActionForm form, 
      HttpServletRequest request, HttpServletResponse response) 
      throws DbException { 

     // Cast the form 
     UserFormEnrolled iForm = (UserFormEnrolled) form; 
     iForm.setStudentId(request.getRemoteUser()); 

     // Insert the student 
     RowSet crsEnrolled = EnrollModel.getEnrolledClasses(iForm); 
     request.setAttribute("crsEnrolled", crsEnrolled); 

     return mapping.findForward("success"); 
    } 
}

來源

2010-06-08 nicotine

你在ShowEnrolledAction中有什麼代碼？什麼是enrolled.jsp的內容？ – Tommi 2010-06-08 08:38:58

@Tommi我在這些代碼中添加了一些內容，感謝您抽出寶貴時間來看看這些內容，這讓我倍感震驚。 – nicotine 2010-06-08 19:21:29

客戶端HTML是什麼樣的？它不完整嗎？有時它會停止？如果您刪除此代碼：您的頁面是否呈現結果？ – 2010-06-09 11:18:20

我認爲問題是與HTML：while循環內的表單標籤。從循環中拿出來並嘗試。

來源

2010-06-09 14:07:46

如果在web.xml中<url-pattern>*.do/<url-pattern>是類似的東西，然後在

<html:form action="/showEnrolled"> 
</html:form>

請註明html:form action="**/showEnrolled.do**">

它依靠什麼前綴在那裏的URL模式那麼這應該是在形式上相同前綴行動。

我希望它能幫到你

來源

2010-12-09 11:09:24 satya

幫助Struts動作映射

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