Html form stop sunmitting to servlet

Hi,
I have a web application developed with Servlet and running on Tomcat. The web application is to search and retrieve records in Mysql database. The records are displayed and click a submit button will create a pdf file. The user may print it or/and save it.
The web application runs well after deployed to Tomcat, but after while, it changes from time to time, sometime one day, sometime several hours. Click the submit button does not submit to the servlet which creates a pdf file. I have to redeploy the web application to make it work again.
There is no exception thrown and no any other run time errors, simplely click the button does nothing. The screen refreshes, and show the same displayed records.
Thanks for any ideas about what might be wrong.
Mindy

What i m goin to say doesn't hv any affect but smtimes it does hav..
just try this...
cut ur source folder frm the present location & paste it in parallel to ur Webinf folder,then recompile & restart tomcat & run ur appl.

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Error when using a HTML form along with a servlet

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Uploading File To MySQL from HTML form via Servlet

Hello all !
I hope this is better place to ask.
I'm working on simple Servlet/Jsp application trying to hold to MVC pattern and got stuck on uploading file to MySQL db.
Here's what I'm trying to accomplish:
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3) Servlet processes the request, gets a connection to the db and inserts the image into the table.
4) after that user is able to retrieve an image from db and display it in JSP page.
This is pretty much the same task Angela was trying to do here:
http://forum.java.sun.com/thread.jspa?threadID=667597&messageID=3905449
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what am i driving at ?
-----------------------1-----------------------
After first line of code
boolean isPart = FileUpload.isMultipartContent(request);netBeans 5.5 beta2 with bundled Tomcat 5.5.17 underlines this with warning saying that
org.apache.commons.fileupload.FileUploadBase
has been depreceted
is it a reason for concern ?
-----------------------2-----------------------
Is it actually good idea to store images in db as blob ?
what about large ammounts of text ?
thank you
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is it a reason for concern ?Yes.
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If it is depricated becouse it is not safe to use the method you should clearly understand the risks involved in using the method and see if that can give you any trouble in your project.
-----------------------2-----------------------
Is it actually good idea to store images in db as
blob ?I think that it is ths best option available when you want to store binary data
what about large ammounts of text ?You can use clob columns.
By the way when you store files in the database its better you put some extra columns to store the file name and file type(mime) becouse you cant directly detect those things later by just looking at the data of the file.

JDBC + SERVLET: inserting text data to access file from Html form

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Maybe I must to ad some <meta ...> , but where ?

You're dealing with Unicode, I'd guess, and not ASCII.
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Access isn't exacly a world-class database. (If it was, there'd be no reason for M$ to develop SQL Server.) I'd find out if it supports other character sets. If not, you'll have to switch to a more capable database that does. - MOD

Displaying images in HTML Forms inside Servlets

          Dear friends
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          Sriram (Ram) Peddibhotla, PhD


          Dear Friends
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          "Sriram (Ram) Peddibhotla" <[email protected]> wrote:
          >
          >Dear Friends
          >
          >How are you?
          >
          >When the Servlet displays in the browser (IE5.0), when I click on where
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          >in web.xml
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          >Thanking you
          >Very truly yours
          >Sriram (Ram) Peddibhotla, PhD
          >
          >
          >"Xiang Rao" <[email protected]> wrote:
          >>
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          >>
          >>"Sriram (Ra) Peddibhotla" <[email protected]> wrote:
          >>>
          >>>Dear friends
          >>>
          >>>How are you?
          >>>
          >>>I am developing Servlets in WebGain Studio Pro V4.1 VisualCafe
          >>>V4.1 to display dynamic HTML forms with embedded
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          >>>I appreciate all comments and suggestions.
          >>>
          >>>Thanking you
          >>>Very truly yours
          >>>Sriram (Ram) Peddibhotla, PhD
          >>>
          >>
          >

Getting a servlet to write a HTML form

The problem is that I'm writing an auction website for a uni coursewor. In the main index, it has a "View Auctions"link, linked to a servlet that looks up the data in the database. It then generates a webpage with the results. At the bottom of the HTML page generated by the servlet, I want it to create a form so that the user can enter a bid by filling in the fields and click the submit button. My plan is to then have it go to another servlet that records the bid in the database.
The main problem is the HTML line: <form name="makeBidForm" method="post" action="servlet/Bid">
Because it has (and needs) quotes in the HTML coding, I'm finding it difficult to build a string with the quotes in it; everytime I enter a " character, Java is assuming I'm either opening or closing a Java ", instead of just wanting to have the " as part of the string.
Is there a way to get around this, or a better way to do what i'm doing?
So far the webpage shows up ok, but I'm getting ' " expected ' errors when i add the form line.
The code I have so far is below:
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//Gopinath Chandran, 2137957, 11.11.2004
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Might I suggest you use a JSP for the presentation rather than a servlet.
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Hi,
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But when I do this, nothing prints to the screen, so obviously it isn't right.And don't expect System.out.println() in a servlet to print to any "screen". It certainly won't appear in the browser in response to your request; it should appear in one of your servlet container's log files. If it doesn't, then use the servlet log() method instead. Or just generate HTML containing your debugging output and send that back as the response.
PC²

Help : Calling a Servlet.doPost from a HTML Form (404 Error !!!)

All
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Any ideas ? Is my Servlet Setup and Execution Correct ?
Any help is appreciated.
My JDeveloper Version is the latest release :
About
Oracle JDeveloper 11g Release 1 11.1.1.2.0
Studio Edition Version 11.1.1.2.0
Build JDEVADF_11.1.1.2.0_GENERIC_091029.2229.5536
Copyright © 1997, 2009 Oracle and/or its affiliates. All rights reserved.
IDE Version: 11.1.1.2.36.55.36
Product ID: oracle.jdeveloper
Product Version: 11.1.1.2.36.55.36
Any help and advice is greatly appreciated.
Regards
patrice

John
I got it to work !!
I had to place the application name in the action value also I had to change the port number, from 8080 to be 7101.
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How to get a parameter from a HTML select list in a servlet

Hi!
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Bye
Edited by: bladu on Jun 4, 2008 1:25 AM

Where is the error ? No error in portion of code you have shown.
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node is selected, this information is recovered and shown in
the JEditorPane with a html form. To make the html form,
the applet calls a servlet, which retrieves the information of
the node selected from the database. This information is stored
like a XML string, and using XSLT, the servlet sends the html
form to the applet, which shows it in the JEditorPane.
My problem is that I don't know how I can recover new values
that a user of the application can introduce in the input fields
of the html form. I need to recover this new values and send them
to another servlet which store the information in the database.
If someone could help me I'd be very pleased.
Eduardo

At least I found a fantastic example. Here it is:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
public class FormSubmission extends JApplet {
private final static String FORM_TEXT = "<html><head></head><body><h1>Formulario</h1>"
+ "<form action=\"\" method=\"get\"><table><tr><td>Nombre:</td>"
+ "<td><input name=\"Nombre\" type=\"text\" value=\"James T.\"></td>"
+ "</tr><tr><td>Apellido:</td>"
+ "<td><input name=\"Apellido\" type=\"text\" value=\"Kirk\"></td>"
+ "</tr><tr><td>Cargo:</td>"
+ "<td><select name=\"Cargo\"><option>Captain<option>Comandante<option>General</select></td>"
+ "</tr><td colspan=\"2\" align=\"center\"><input type=\"submit\" value=\"Enviar\"></td>"
+ "</tr></table></form></body></html>";
protected HashMap radioGroups = new HashMap();
private Vector v = new Vector();
public FormSubmission() {
getContentPane().setLayout(new BorderLayout());
JEditorPane editorPane = new JEditorPane();
editorPane.setEditable(false);
editorPane.setEditorKit(new HTMLEditorKit()
public ViewFactory getViewFactory() {
return new HTMLEditorKit.HTMLFactory() {
public View create(Element elem) {
Object o = elem.getAttributes().getAttribute(javax.swing.text.StyleConstants.NameAttribute);
if (o instanceof HTML.Tag)
HTML.Tag kind = (HTML.Tag) o;
if (kind == HTML.Tag.INPUT || kind == HTML.Tag.SELECT || kind == HTML.Tag.TEXTAREA)
return new FormView(elem)
protected void submitData(String data)
showData(data);
protected void imageSubmit(String data)
showData(data);
// Workaround f�r Bug #4529702
protected Component createComponent()
if (getElement().getName().equals("input") &&
getElement().getAttributes().getAttribute(HTML.Attribute.TYPE).equals("radio"))
String name = (String) getElement().getAttributes().getAttribute(HTML.Attribute.NAME);
if (radioGroups.get(name) == null)
radioGroups.put(name, new ButtonGroup());
((JToggleButton.ToggleButtonModel) getElement().getAttributes().getAttribute(StyleConstants.ModelAttribute)).setGroup((ButtonGroup) radioGroups.get(name));
JComponent comp = (JComponent) super.createComponent();
// Peque�a mejora visual
comp.setOpaque(false);
return comp;
return super.create(elem);
//editorPane.setText(FORM_TEXT);
editorPane.setText(texto);
getContentPane().add(new JScrollPane(editorPane), BorderLayout.CENTER);
private void showData(String data) {
// ergebnis significa resultado
StringBuffer ergebnis = new StringBuffer("");
StringTokenizer st = new StringTokenizer(data, "&");
while (st.hasMoreTokens()) {
String token = st.nextToken();
String key = URLDecoder.decode(token.substring(0, token.indexOf("=")));
String value = URLDecoder.decode(token.substring(token.indexOf("=")+1,token.length()));
v.add(value);
ergebnis.append(" "); ergebnis.append(key); ergebnis.append(": "); ergebnis.append(value); ergebnis.append(" ");
ergebnis.append(" ");
JOptionPane.showMessageDialog(this, ergebnis.toString());
public static void main(String[] args) throws Exception {
JFrame frame = new JFrame ();
FormSubmission editor = new FormSubmission ();
frame.getContentPane().add(editor);
frame.pack();
frame.show();
}

Html form stop sunmitting to servlet

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