getting null on request.getParameter() on submit of form in java code?
IN JAVA CODE IN JSP as below i m getting null value for field"noOfRecords".
if (request.getMethod().equalsIgnoreCase("POST")) {
try
{
noOfRecords=Integer.parseInt(request.getParameter("noOfRecords").trim());
}
catch(NumberFormatException e)
{
throw new Exception("No of records Field should be numeric.");
}
catch(NullPointerException e)
{
throw new Exception("No of records should be specified.");
}
HTML CODE IS AS BELOW.
<BODY leftmargin="0" topmargin="0" marginheight="0" marginwidth="0" bgcolor="#ffffff" onLoad="document.customerFileUpload.filePath.focus();">
<FORM method="post" name="customerFileUpload" action="CustomerFileUpload.jsp" onSubmit="return validate(this);" enctype="multipart/form-data">
<table width="98%" border="0" cellpadding="2" cellspacing="1" align="center">
<tr>
<td width="30%" class="bandcolorlabel">Select File *:</td>
<td width="70%"><input type="FILE" name="filePath" class="ibox" size="30"></td>
</tr>
<tr>
<td width="30%" class="bandcolorlabel">No Of Records</td>
<td width="70%"><input type="text" name="noOfRecords" class="ibox" size="30"></td>
</tr>
</table>
<table width="100%" border="0" cellpadding="2" cellspacing="1">
<tr>
<td><input type="submit" class="btn" value="Upload" >
</td>
</tr>
</table>
</form>
</BODY>
Answer
Since you post using multipart encoding ('multipart/form-data') the parameters are not present as you expect.
If for instance you are using commons-fileupload the parameters would be present as and are identifiable using the 'isFormField' method on the FileItem object.
This thead on coderanch explains how: coderanch
Most (every) modern webframeworks abstract this away and make this sort of stuff much easier by the way.