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abhinavM 0 Newbie Poster

I have a set of radio buttons.These radio buttons are associated with some questions for survey.I also have a Submit button.I want that as soon as I click the Submit button, the application should read the status of radio buttons.But I am unable to figure out a way of doing this.My code is shown bellow.I am also posting a snapshot of the screen that I am getting when I run this code(Just for little help in understanding).Please help me with providing code for doing this.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 
      <%@ page import="java.sql.*" %>
 
      <%@ page import="java.io.*" %>
       <%@ page import="javax.swing.*" %>
   <%@ page import="java.awt.*" %>
 
 
      <html>
 
      <head>                                                
 
      <title>display</title>
 
      </head>
 
      <body>
 
      <h2>Data</h2>
 
      <%
 
      try {
 
      Connection connection = null;
 
      Statement statement = null;
 
      ResultSet rs = null;
    System.out.println("loading class") ;
 
      Class.forName("com.ibm.db2.jcc.DB2Driver");
 
System.out.println("after loading class"); 
 
      connection  = DriverManager.getConnection("jdbc:db2://localhost:50000/Simple","administrator","welcome2sa2");
  System.out.println("after conncetion class");
 
      System.out.println(connection.getClass());
 
 
      statement = connection.createStatement();
 
 
 
      String QueryString = "select * from question";
 
      rs = statement.executeQuery(QueryString);
 
      int i=1;
 
      %>
 
      <TABLE cellpadding="15" border="1" style="background-color: #ffffcc;">
 
      <%
 
      while (rs.next()&&(i<=4)) {
 
      %>
       <TR>
        <TD><%=rs.getString(1)%></TD>
        <TD><%=rs.getString(2)%></TD>
 
        <TD><input type='radio' name="radio<%= i %>"><%=rs.getString(3)%></TD>
        <TD><input type='radio' name="radio<%= i %>"><%=rs.getString(4)%></TD>
        <TD><input type='radio' name="radio<%= i %>"><%=rs.getString(5)%></TD>
        <TD><input type='radio' name="radio<%= i %>"><%=rs.getString(6)%></TD>
 
    </TR>  
 
      <%i++; %>                                                      
 
      <%   }   %>
 
 
      <% 
      rs.close();
 
      statement.close();
 
      connection.close();
 
      } catch (Exception ex) {
 
      %>
 
 
      <font size="+3" color="red"></font>
 
     <%   
 
     out.println("Unable to connect to database."); 
 
           }
       %>
 
 
 
      </TABLE>
 
 
       <script type="text/javascript">
      function onsubmit()
      {
 
 
      document.write("Submitting");
 
      	return true;
      }
       </script>
 
 
 
 
      <form name="myform">
  <input type="submit" name="submit" value="Submit" align="middle" onclick="onsubmit();">
  </form>
 
 
 
      </body>
 
      </html>
pic1.jpg 25.19 KB
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Dani AI

Generated

The most likely reasons the selections never arrive at the server are: the radio inputs are not inside the same form that is submitted, the radio inputs have no value attributes, and the page script uses document.write() which will clobber the document. For the quick fix is to wrap all question rows and the submit button in a single <form method="post" action="...">, give each option an explicit value, and use request.getParameter(...) (or a loop over parameter names) on the server side to read which option was selected. See the HTML form and radio input reference on MDN for details on how browsers send selected radio values: MDN: input type=radio and MDN: Sending and retrieving form data.

A minimal server-side pattern in the JSP/Servlet that receives the form might look like this:

String answer1 = request.getParameter("radio1"); // null if none selected
for (int i = 1; i <= numQuestions; i++) {
    String val = request.getParameter("radio" + i);
    if (val != null) {
        // process/store val
    }
}

Notes and cautions: do not use document.write() in a submit handler — use form.onsubmit or onsubmit to validate and return false to cancel submission. Avoid naming your JS function onsubmit (it collides with the DOM event name); use a descriptive name like handleSubmit. Also avoid embedding JDBC and UI imports in JSP pages: move database code into a servlet or DAO class and use prepared statements and proper resource cleanup. For how request.getParameter works, see the servlet API docs: HttpServletRequest#getParameter.

Troubleshooting checklist: ensure radios are inside the form tag, each option has a value, form method and action are set, remove document.write, and verify parameters on the server with request.getParameter (or log request.getParameterMap() during testing).

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