title: httpservlet request getparameter of unchecked and checked check boxes in java
body: <p>my form has several checkboxes on it (around 15) and the issue im having is that the names of the check boxes only appear in the enumeration if they are checked but i want all of them to be returned so that when i print the data it will have the name of the checkbox and say "checked" or "unchecked". i had thought of one way that i could just manually set the flag to see what is present and what isnt, but that doesnt seem remotely efficient. </p>
  
  <pre><code>public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
   {
  
          try
          {
              FileWriter writer = new FileWriter("OrderFormData.csv");
              writer.append("FieldName");
              writer.append(',');
              writer.append("Value");
              writer.append('\n');
              @SuppressWarnings("unchecked")
              Enumeration &lt;String&gt; paramNames = request.getParameterNames();
              while(paramNames.hasMoreElements()) 
              {
                  String paramName = (String)paramNames.nextElement();
                  writer.append(paramName);
                  writer.append(',');
                  String[] paramValues = request.getParameterValues(paramName);
                  if (paramValues.length == 1)
                  {
                      String paramValue = paramValues[0];
                      if (paramValue.length() == 0)
                      {
                          writer.append("No Value");
                          writer.append('\n');
                      }
                      else
                      {
                          writer.append(paramValue);
                          writer.append('\n');
                      }
                  }
                  else
                  {
                      for(int i = 0; i&lt;paramValues.length; i++)
                      {
                          writer.append(paramValues[i]);
                          writer.append(',');
                      }
                      writer.append('\n');
                  }
  
  
              }
              writer.flush();
              writer.close();
          }
          catch(IOException e)
          {
               e.printStackTrace();
          }
  
      }
  }
  </code></pre>