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A minor error involving JSP

Posted on 2004-10-06
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Last Modified: 2011-09-20
I got this jsp example from the internet but the problem is that, it can not show some fields like firstname, lastname, address etc. To my surprise again it can show fields starting from state downwards. So i was wondering if you could help me figure out the problem.

 <% @ page import="java.util.";%>
  <% @ page language="java"%>
   
H <HTML><HEAD><TITLE>Dynamic Form</TITLE></HEAD>
  <BODY>
  <B>Form</B>
  <FORM ACTION=dynamicForm.jsp METHOD=POST>
  <TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0>
  <%  String[] textFields = {"FirstName","LastName","Address","City","Zip"};
     for(int j=0; j<textFields.length; j++){     %>
     <TR>    <TD> <%=textFields[j]%>:                       </TD>
              <TD> <INPUT TYPE=TEXT NAME=<%=textFields[j]%>> </TD>
     </TR>
  <%  }   %>
     <TR>    <TD> State  </TD>
             <TD> <SELECT NAME=State>
  <%  String[] states = {"AZ", "CA", "NM", "MA", "ME", "MD", "..."};
      for(int s=0; s<states.length; s++) {    %>
                     <OPTION><%=states[s]%></OPTION>
  <%  }   %>
                  </SELECT></TD>
     </TR>
     <TR>    <TD> Card Number  </TD>
             <TD> <INPUT TYPE=TEXT NAME=cNumber></TD>
     </TR>
     <TR>    <TD> Card Type  </TD>
             <TD> <SELECT NAME=CardType>
  <%  String[] cTypes = {"Amex", "Visa", "Master Card", "Discovery", "..."};
     for(int t=0; t<cTypes.length; t++) {    %>
                     <OPTION><%=cTypes[t]%></OPTION>
  <%  }   %>
                  </SELECT></TD>
     </TR>
     <TR>    <TD> Expiration Date (MM/DD/YYYY) </TD>
    <TD> <INPUT TYPE=TEXT NAME=cMonth SIZE=2><INPUT TYPE=TEXT NAME=cDay SIZE=2>
             <SELECT NAME=cYear>
             <%  int startYear = 2000;
                 int endYear = 2010;
                 for(int y=startYear; y<endYear; y++) {    %>
                     <OPTION><%=y%></OPTION>
            <%  }   %>
             </SELECT></TD>
     </TR>
  </TABLE>
     <INPUT TYPE=SUBMIT VALUE=Submit>
  </FORM>
  <HR>
  <B>Form Content</B><BR>
  <TABLE>
  <%  Enumeration parameters = request.getParameterNames();
      while(parameters.hasMoreElements()){
         String parameterName = (String)parameters.nextElement();
         String parameterValue = request.getParameter(parameterName); %>
        <TR>
             <TD><%=parameterName%></TD>
             <TD><%=parameterValue%></TD>
         </TR>
  <%  }   %>
  </BODY></HTML>
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Question by:pkeketso
  • 3
5 Comments
 
LVL 33

Accepted Solution

by:
sajuks earned 50 total points
ID: 12235462

<%@ page import="java.util.*" %>
  <%@ page language="java"%>
   
H <HTML><HEAD><TITLE>Dynamic Form</TITLE></HEAD>
  <BODY>
  <B>Form</B>
  <FORM ACTION=dynamicForm.jsp METHOD=POST>
  <TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0>
  <%  String[] textFields = {"FirstName","LastName","Address","City","Zip"};
     for(int j=0; j<textFields.length; j++){     %>
     <TR>    <TD> <%=textFields[j]%>:                       </TD>
              <TD> <INPUT TYPE=TEXT NAME=<%=textFields[j]%>> </TD>
     </TR>
  <%  }   %>
     <TR>    <TD> State  </TD>
             <TD> <SELECT NAME=State>
  <%  String[] states = {"AZ", "CA", "NM", "MA", "ME", "MD", "..."};
      for(int s=0; s<states.length; s++) {    %>
                     <OPTION><%=states[s]%></OPTION>
  <%  }   %>
                  </SELECT></TD>
     </TR>
     <TR>    <TD> Card Number  </TD>
             <TD> <INPUT TYPE=TEXT NAME=cNumber></TD>
     </TR>
     <TR>    <TD> Card Type  </TD>
             <TD> <SELECT NAME=CardType>
  <%  String[] cTypes = {"Amex", "Visa", "Master Card", "Discovery", "..."};
     for(int t=0; t<cTypes.length; t++) {    %>
                     <OPTION><%=cTypes[t]%></OPTION>
  <%  }   %>
                  </SELECT></TD>
     </TR>
     <TR>    <TD> Expiration Date (MM/DD/YYYY) </TD>
    <TD> <INPUT TYPE=TEXT NAME=cMonth SIZE=2><INPUT TYPE=TEXT NAME=cDay SIZE=2>
             <SELECT NAME=cYear>
             <%  int startYear = 2000;
                 int endYear = 2010;
                 for(int y=startYear; y<endYear; y++) {    %>
                     <OPTION><%=y%></OPTION>
            <%  }   %>
             </SELECT></TD>
     </TR>
  </TABLE>
     <INPUT TYPE=SUBMIT VALUE=Submit>
  </FORM>
  <HR>
  <B>Form Content</B><BR>
  <TABLE>
  <%  Enumeration parameters = request.getParameterNames();
      while(parameters.hasMoreElements()){
         String parameterName = (String)parameters.nextElement();
         String parameterValue = request.getParameter(parameterName); %>
        <TR>
             <TD><%=parameterName%></TD>
             <TD><%=parameterValue%></TD>
         </TR>
  <%  }   %>
  </BODY></HTML>
   

<HTML><HEAD><TITLE>Dynamic Form</TITLE></HEAD>
  <BODY>
  <B>Form</B>
  <FORM ACTION=dynamicForm.jsp METHOD=POST>
  </BODY></HTML>
0
 
LVL 33

Expert Comment

by:sajuks
ID: 12235464
notice this change
<%@ page import="java.util.*" %>
  <%@ page language="java"%>
0
 
LVL 33

Expert Comment

by:sajuks
ID: 12235501
Also you cannot ensure the order of the parameters being submitted .
You have to use something like
  if (parameterName .equals("param1"))
<TD><%=parameterName%></TD>
            <TD><%=parameterValue%></TD>

}

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