How to make jsp as a Dispatcher

Hi everyone
How can i make a JSP as a dispatcher that connects to a servlet for authenticating a user? Have the servlet return a boolean value and redirect your JSP to the appropriate page.
Any Help appreciated
Thanks
Mumtaz

RequestDispatcher dispatcher = getServletContext().getRequestDispatcher( targetUrl );
if ( dispatcher == null ) {
throw new ServletException( "Cannot dispatch to " + targetUrl );
dispatcher.forward( req, resp );easy, wasn't it? you CAN find such stuff in the documentation and the specs if you care to read it.
robert

Similar Messages

Jsp waiting for servlet response how to make

Hi All,
i have some doubts about making servlet response for jsp request
Am watched some online reservation sites it search some hotel names untill the hotel names display (between that time)
the image processing shows how can i make like that via jsp and servlet plz expalin with example code plz.
how to make jsp wait to servlet response like that plz reply
Thanks

It's a client side thing. Learn Javascript (and CSS) and if necessary also learn Ajax afterwards. There are nice tutorials at w3schools.com. This issue is not really related to JSP/Servlets.
Displaying the progress image isn't that hard. Just show some <div> element with an image during the onclick.

How to write JSP that returns current time(AJAX)

how to make jsp returns current system time in response
i am using the following code
test.jsp
<%@page pageEncoding="UTF-8" import="java.util.Date" import="java.util.*" import="java.lang.*"%>
<%
out = response.getWriter();
out.println(System.currentTimeMillis());
%>where as i am following an .ASP file working well with code
test.asp
<%
response.expires=-1
response.write(time)
%>

Chkeck this out
Ajax_Time.htm
<html>
<body>
<script type="text/javascript">
function ajaxFunction()
var xmlHttp;
try
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
catch (e)
// Internet Explorer
try
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
catch (e)
try
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
catch (e)
alert("Your browser does not support AJAX!");
return false;
xmlHttp.onreadystatechange=function()
if(xmlHttp.readyState==4)
document.myForm.time.value=xmlHttp.responseText;
xmlHttp.open("GET","time.jsp",true);
xmlHttp.send(null);
</script>
<form name="myForm">
Name: <input type="text"
onkeyup="ajaxFunction();" name="username" />
Time: <input type="text" name="time" />
</form>
</body>
</html>
time.jsp
<%@ page import="java.text.*,java.util.*" session="false"%>
<%!
DateFormat fmt = new SimpleDateFormat("hh:mm:ss aa");
String now = fmt.format(new Date());
%>
The time is <%= now %>

How To Make Void That Prints Something In JSP

hi Everyone I'm Very New To Java & JSP I'm Expert In PHP , Anyway . .
I want A Code like The Following Print Something Out :
<%@ page import = "java.io.*"%>
<%!
public void str_repeat(String str2,int num){
     int i;String FINAL="";
     for(i=0;i<num;i++)FINAL=FINAL+str2;
     System.out.print(FINAL);
%>
<%
str_repeat("SOMETHING",2);
%>And Please I don't Want Anyone to Come UP with A Function That Makes The String Repeat (( I Wan To Learn How To Make A Void That Outputs Something )) And Not A Function . .
notice : The Above Code Gives Nothing At All And When I Use
out.print Instead Of System.out.print It Gives Error

My Code Now Is As Follows :
<%@ page import = "java.io.*"%>
<%!
public void str_repeat(String str2,int num, JspWriter out){
     int i;String FINAL="";
     for(i=0;i<num;i++)FINAL=FINAL+str2;
      out.print(FINAL);
%>
<%
str_repeat("SOMETHING",2, out);
%> and it gives the following error :
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 17 in the jsp file: /index.jsp
Unhandled exception type IOException
14: public void str_repeat(String str2,int num, JspWriter out){
15:      int i;String FINAL="";
16:      for(i=0;i<num;i++)FINAL=FINAL+str2;
17:       out.print(FINAL);
18: }

How to make paging in JSP?

I would like to know how to make paging in JSP?
PLEASE HELP ME !

It is much easier , if you use MVC framework, you can store
results in session appropriate action to servlet, it will serve page by page.

How to make J2EE engine auto load The JSP Pages

After I modify some JSP pages, If I just copy them to the folder in the Server, The pages didn't update.
How to make it auto update?

Hello Shen,
please take in consideration, that JSP page is translated to HttpServlet component when deployed. It's not accessed via original JSP file.
You can try to modify the final HttpServlet class file, but then you have to go through pre-compiling.
Hope it helps,
regards.
mz

How to make excel export in jsp

Hi All,
I have a jsp page to display a table. I want to add a "excel download" button
in this page, once user click this button, it will invoke the microsoft excel
and all table content will appear in the excel spreadsheet.
I tried to set the content: <%@ page contentType="application/vnd.ms-excel"%>
the rest code as following. However, it won't work for me. Does anyone has any
experience in doing this?
<%@ page contentType="application/vnd.ms-excel"%>
<%@ taglib uri="netui-tags-databinding.tld" prefix="netui-data"%>
<%@ taglib uri="netui-tags-html.tld" prefix="netui"%>
<%@ taglib uri="netui-tags-template.tld" prefix="netui-template"%>
<netui:html>
<head>
<title>
Web Application Page
</title>
</head>
<body>
<table border="1">
<tr style="background-color:#3366ff;font-family:arial;">
<td>Structure</td>
<td>Compound</td>
<% // Get the Items from the request stream
Vector mr_names = (Vector) request.getAttribute("method_result_names");
for (int f=0;f<mr_names.size();f++) {
out.println("<td>" + mr_names.get(f) + "</td> ");
Vector mrs = (Vector) request.getAttribute("method_results");
for (int g=0; g<mrs.size(); g++)
out.println("</tr><tr>");
Vector row1 = (Vector)mrs.get(g);
for (int f=0;f<mr_names.size()+1;f++) {
String s = (String)row1.get(f);
if (f==0) {
%>
<td><embed src="structure.jsp?Sample_code=<%=s%>" width="120" height="100"></embed></td>
<%
out.println("<td>" + s + "</td> ");
out.println("</tr>");
%>
</table>
</body>
</netui:html>
Thanks!
Zhenhao

I am trying to do the same thing. I also cant get it to work. I am
thinking it may have something to do with the concept of ScopedResponse, but
I am not sure. There is very little documentation and more importantly
examples of how to make sense of the getOuterResponse() method. Dev2Dev and
Google are of no help.
Anyone care to explain this to us?
Michael.
"Zhenhao Qi" <[email protected]> wrote in message
news:3fd4f634$[email protected]..
>
Hi All,
I have a jsp page to display a table. I want to add a "excel download"button
in this page, once user click this button, it will invoke the microsoftexcel
and all table content will appear in the excel spreadsheet.
I tried to set the content: <%@ pagecontentType="application/vnd.ms-excel"%>
the rest code as following. However, it won't work for me. Does anyone hasany
experience in doing this?
<%@ page contentType="application/vnd.ms-excel"%>
<%@ taglib uri="netui-tags-databinding.tld" prefix="netui-data"%>
<%@ taglib uri="netui-tags-html.tld" prefix="netui"%>
<%@ taglib uri="netui-tags-template.tld" prefix="netui-template"%>
<netui:html>
<head>
<title>
Web Application Page
</title>
</head>
<body>
<table border="1">
<tr style="background-color:#3366ff;font-family:arial;">
<td>Structure</td>
<td>Compound</td>
<% // Get the Items from the request stream
Vector mr_names = (Vector) request.getAttribute("method_result_names");
for (int f=0;f<mr_names.size();f++) {
out.println("<td>" + mr_names.get(f) + "</td> ");
Vector mrs = (Vector)request.getAttribute("method_results");
for (int g=0; g<mrs.size(); g++)
out.println("</tr><tr>");
Vector row1 = (Vector)mrs.get(g);
for (int f=0;f<mr_names.size()+1;f++) {
String s = (String)row1.get(f);
if (f==0) {
%>
<td><embed src="structure.jsp?Sample_code=<%=s%>"width="120" height="100"></embed></td>
>
<%
out.println("<td>" + s + "</td> ");
out.println("</tr>");
%>
</table>
</body>
</netui:html>
Thanks!
Zhenhao

How to make a Struts message null after used in JSP?

Hi,
In the context of Struts/JSP,
An action class might write error messages by
ActionError msg = new ActionError("msg.request.something");
ActionErrors msgs = new ActionErrors();
msgs.add(ActionErrors.GLOBAL_ERROR,msg);
saveErrors(request,msgs);
This message will produce a popup modal window by the following JSP code:
<logic:messagesPresent>
<html:messages id="error">

<script>javascript:alert('<%=error%>')</script>
</html:messages>
</logic:messagesPresent>
The problem is that this JSP page is shared by serveral actions: when another action invoke this page again, the previous error message will take effect again.
So my question is how to make message null after used once by its author.
Thx.
PY

msgs = null;

How to make settings of root folder , while creating customize JSP Pages.

Hi All,
I am developing customized BI Beans Application.While the development ,I gose to compnent pallete and try to access BI Beans Objects which are on same workspace . But in the location tab it shows root foloder and only one object . I am unable to access another object which are belongs to same workspace .
My question is how to make setting of root folder (there is no any option) and how to access other objects from same workspace
Please guide me, if someone have any idea
ViSHAL

Can you describe the steps in detail?
Which tag are you using from the component Palette?
Also do you have multiple workspaces in your OLAP source DB?

How to make reference to ENTITY in tld file ?

Hello,
I have a tld file in which in put the definition of my own components.
I'd like to create ENTITY in XML and make reference to those entities in this tld, in order to make the tld smaller.
<!DOCTYPE taglib
PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd" [
<!ENTITY display_value_only_attributes SYSTEM "entities/display_value_only_attributes.xml">
]>
&display_value_only_attributes;But when I make this, I got the following exception:
2007-02-05 11:46:57,881 ERROR [org.apache.catalina.startup.TldConfig] Exception processing TLD META-INF/cwsoft.tld in JAR at resource path C:\jboss-4.0.1sp1\server\default\tmp\deploy\tmp28432cwsoft-technicalframework-web-1.2.2-exp.war\WEB-INF\lib\cwsoft-cweb-1.2.2.jar in context /cwsoft/technicalframework
java.io.FileNotFoundException: C:\jboss-4.0.1sp1\bin\entities\display_value_only_attributes.xml
     at org.jboss.net.protocol.file.FileURLConnection.connect(FileURLConnection.java:80)
     at org.jboss.net.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:89)
     at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
     at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
     at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEntityReference(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
     at org.apache.commons.digester.Digester.parse(Digester.java:1647)
     at org.apache.catalina.startup.TldConfig.tldScanStream(TldConfig.java:514)
     at org.apache.catalina.startup.TldConfig.tldScanJar(TldConfig.java:472)
     at org.apache.catalina.startup.TldConfig.execute(TldConfig.java:307)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4282)
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.apache.catalina.core.StandardContext.init(StandardContext.java:5441)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
     at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:289)
     at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:92)
     at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:374)
     at org.jboss.web.WebModule.startModule(WebModule.java:62)
     at org.jboss.web.WebModule.startService(WebModule.java:40)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:272)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:222)
     at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:897)
     at $Proxy0.start(Unknown Source)
     at org.jboss.system.ServiceController.start(ServiceController.java:418)
     at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
     at $Proxy24.start(Unknown Source)
     at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:360)
     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:964)
     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:775)
     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
     at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:121)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
     at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
     at $Proxy8.deploy(Unknown Source)
     at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:325)
     at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:501)
     at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:204)
     at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:277)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:272)
     at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:222)
     at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:897)
     at $Proxy0.start(Unknown Source)
     at org.jboss.system.ServiceController.start(ServiceController.java:418)
     at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
     at $Proxy4.start(Unknown Source)
     at org.jboss.deployment.SARDeployer.start(SARDeployer.java:273)
     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:964)
     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:775)
     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:738)
     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:722)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
     at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:121)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
     at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
     at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177)
     at $Proxy5.deploy(Unknown Source)
     at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:434)
     at org.jboss.system.server.ServerImpl.start(ServerImpl.java:315)
     at org.jboss.Main.boot(Main.java:195)
     at org.jboss.Main$1.run(Main.java:463)
     at java.lang.Thread.run(Thread.java:534)Could someone indicates me how to make it work?
Thanks in advance.
bgOnline

No, indeed !
But I forgot to specify that this file is placed in my jar that is included is my war.
So, I'd like to make reference to this file, and not to put it somewhere in my AS.
Thanks for your reply...

How to make the server threadsafe (Please Help)

Hi to all,
I have urgent question, and any
reply will be welcome.
How i make my server that use rmi threadsafe,
i want that each request from clients,the
server will make a separate thread.
the ejb use jndi to do this, how can i do this in rmi
i want that a client will get a reference to a factory
object in the server, the factory object will create a
thread and will return the reference to the client.
Thanks,
dan

Hi Bill,
Thanks for your reply.
at the rmi specification it said that :
3.2 Thread Usage in Remote Method Invocations
A method dispatched by the RMI runtime to a remote object implementation may or may not execute in a separate thread. The RMI runtime makes no guarantees with respect to mapping remote object invocations to threads. Since remote method invocation on the same remote object may execute concurrently, a remote object implementation needs to make sure its implementation is thread-safe.
this is all what sun has to say about using
threads with rmi.
do you have any example for using rmi server
that handle concurrent access?
again,
lots of thanks for your help.
dan

How to store jsp session data of different user in util.hashmap

how to store jsp session data of different user in java.util.hashmap
and access the data of all user on the server side
The same example is given in professional jsp but its not working.
I can use getIds() of httpsessioncontext but it's depricated

Hi
I'm trying to make an example.
With the following codes you can get the date from the session.
request.getSession().getAttribute("sessionname")
To store it in a hashmap you could do it like this ->
Hashmap hm = new Hashmap();
hm.put(Object key, request.getSession().getAttribute("sessionname"));
I hope you understand it if not just write it!
Cyrill

How to deploy JSP's on tomcat 4.1

i have XP machine.
war command is not working on my machine,any thing i have to do to make it work?.
jdk is working fine,and ANT is also working.
but whan i run the command "ant install" i am getting error at build.xml 364 which is
war="file://${build.home}"/>
which is again a problem with war.
is there any way to deploy JSP( just jsp for now) in tomcat
thanks
Narendra.

thanks for the reply.
i found out how to make .war files and i can able to deploy and run JSP files.
with the help of this command
jar cvf myApp.war Date.jsp
do i have to specify the files name at the end of command ?. is there a way to make .WAR file with all subfolders and files?

How to make treetable transparent

hi,
Does anyone have idea how to make the treetable transparent so that the background image can be shown?
Pls provide sample code if possible,thanks!

I don't know if I can come up with some code example
for you since I don't know what treetable your are
using... but... Transparency is always going to relate
to the whether your components are opaque or not.
Opaque = Not Transparent, so setting opaque = false
will hopefully make your table transparent. You may
need to do this on your CellRenderer's as well.
Hope this helps,
Josh Castagno
http://www.jdc-software.com
hi,
i am using JTreeTable provided fron Sun swing connection article,by Scott Violet and Kathy Walrath.
The situation i am facng now is jtree able to be transparent, but jtable still using it default background.
Below are excerpt from sample, setOpaque(false) to jtable seem doesn't take effect.
As i an newbie to swing,kindly point out where part shd i modified on the code. Thz!
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import javax.swing.table.*;
import java.awt.event.*;
import java.util.EventObject;
* This example shows how to create a simple JTreeTable component,
* by using a JTree as a renderer (and editor) for the cells in a
* particular column in the JTable.
* @version 1.2 10/27/98
* @author Philip Milne
* @author Scott Violet
public class JTreeTable extends JTable {
/** A subclass of JTree. */
protected TreeTableCellRenderer tree;
public JTreeTable(TreeTableModel treeTableModel) {
     super();
     // Creates the tree. It will be used as a renderer and editor.
     tree = new TreeTableCellRenderer(treeTableModel);
     // Installs a tableModel representing the visible rows in the tree.
     super.setModel(new TreeTableModelAdapter(treeTableModel, tree));
     // Forces the JTable and JTree to share their row selection models.
     ListToTreeSelectionModelWrapper selectionWrapper = new
     ListToTreeSelectionModelWrapper();
     tree.setSelectionModel(selectionWrapper);
     setSelectionModel(selectionWrapper.getListSelectionModel());
     // Installs the tree editor renderer and editor.
     setDefaultRenderer(TreeTableModel.class, tree);
     setDefaultEditor(TreeTableModel.class, new TreeTableCellEditor());
     // No grid.
     setShowGrid(false);
//added
setOpaque(false);
     // No intercell spacing
     setIntercellSpacing(new Dimension(0, 0));
     // And update the height of the trees row to match that of
     // the table.
     if (tree.getRowHeight() < 1) {
     // Metal looks better like this.
     setRowHeight(20);
* Overridden to message super and forward the method to the tree.
* Since the tree is not actually in the component hierarchy it will
* never receive this unless we forward it in this manner.
public void updateUI() {
     super.updateUI();
     if(tree != null) {
     tree.updateUI();
     // Do this so that the editor is referencing the current renderer
     // from the tree. The renderer can potentially change each time
     // laf changes.
     setDefaultEditor(TreeTableModel.class, new TreeTableCellEditor());
     // Use the tree's default foreground and background colors in the
     // table.
LookAndFeel.installColorsAndFont(this, "Tree.background",
"Tree.foreground", "Tree.font");
* Workaround for BasicTableUI anomaly. Make sure the UI never tries to
* resize the editor. The UI currently uses different techniques to
* paint the renderers and editors; overriding setBounds() below
* is not the right thing to do for an editor. Returning -1 for the
* editing row in this case, ensures the editor is never painted.
public int getEditingRow() {
return (getColumnClass(editingColumn) == TreeTableModel.class) ? -1 :
     editingRow;
* Returns the actual row that is editing as <code>getEditingRow</code>
* will always return -1.
private int realEditingRow() {
     return editingRow;
* This is overridden to invoke super's implementation, and then,
* if the receiver is editing a Tree column, the editor's bounds is
* reset. The reason we have to do this is because JTable doesn't
* think the table is being edited, as <code>getEditingRow</code> returns
* -1, and therefore doesn't automatically resize the editor for us.
public void sizeColumnsToFit(int resizingColumn) {
     super.sizeColumnsToFit(resizingColumn);
     if (getEditingColumn() != -1 && getColumnClass(editingColumn) ==
     TreeTableModel.class) {
     Rectangle cellRect = getCellRect(realEditingRow(),
                         getEditingColumn(), false);
Component component = getEditorComponent();
     component.setBounds(cellRect);
component.validate();
* Overridden to pass the new rowHeight to the tree.
public void setRowHeight(int rowHeight) {
super.setRowHeight(rowHeight);
     if (tree != null && tree.getRowHeight() != rowHeight) {
tree.setRowHeight(getRowHeight());
* Returns the tree that is being shared between the model.
public JTree getTree() {
     return tree;
* Overridden to invoke repaint for the particular location if
* the column contains the tree. This is done as the tree editor does
* not fill the bounds of the cell, we need the renderer to paint
* the tree in the background, and then draw the editor over it.
public boolean editCellAt(int row, int column, EventObject e){
     boolean retValue = super.editCellAt(row, column, e);
     if (retValue && getColumnClass(column) == TreeTableModel.class) {
     repaint(getCellRect(row, column, false));
     return retValue;
* A TreeCellRenderer that displays a JTree.
public class TreeTableCellRenderer extends JTree implements
     TableCellRenderer {
     /** Last table/tree row asked to renderer. */
     protected int visibleRow;
     /** Border to draw around the tree, if this is non-null, it will
     * be painted. */
     protected Border highlightBorder;
     public TreeTableCellRenderer(TreeModel model) {
     super(model);
     * updateUI is overridden to set the colors of the Tree's renderer
     * to match that of the table.
     public void updateUI() {
     super.updateUI();
     // Make the tree's cell renderer use the table's cell selection
     // colors.
     TreeCellRenderer tcr = getCellRenderer();
     if (tcr instanceof DefaultTreeCellRenderer) {
          DefaultTreeCellRenderer dtcr = ((DefaultTreeCellRenderer)tcr);
          // For 1.1 uncomment this, 1.2 has a bug that will cause an
          // exception to be thrown if the border selection color is
          // null.
          // dtcr.setBorderSelectionColor(null);
          dtcr.setTextSelectionColor(UIManager.getColor
                         ("Table.selectionForeground"));
          dtcr.setBackgroundSelectionColor(UIManager.getColor
                              ("Table.selectionBackground"));
     * Sets the row height of the tree, and forwards the row height to
     * the table.
     public void setRowHeight(int rowHeight) {
     if (rowHeight > 0) {
          super.setRowHeight(rowHeight);
          if (JTreeTable.this != null &&
          JTreeTable.this.getRowHeight() != rowHeight) {
          JTreeTable.this.setRowHeight(getRowHeight());
     * This is overridden to set the height to match that of the JTable.
     public void setBounds(int x, int y, int w, int h) {
     super.setBounds(x, 0, w, JTreeTable.this.getHeight());
     * Sublcassed to translate the graphics such that the last visible
     * row will be drawn at 0,0.
     public void paint(Graphics g) {
     g.translate(0, -visibleRow * getRowHeight());
     super.paint(g);
     // Draw the Table border if we have focus.
     if (highlightBorder != null) {
          highlightBorder.paintBorder(this, g, 0, visibleRow *
                         getRowHeight(), getWidth(),
                         getRowHeight());
     * TreeCellRenderer method. Overridden to update the visible row.
     public Component getTableCellRendererComponent(JTable table,
                              Object value,
                              boolean isSelected,
                              boolean hasFocus,
                              int row, int column) {
     Color background;
     Color foreground;
     if(isSelected) {
          background = table.getSelectionBackground();
          foreground = table.getSelectionForeground();
     else {
          background = table.getBackground();
          foreground = table.getForeground();
     highlightBorder = null;
     if (realEditingRow() == row && getEditingColumn() == column) {
          background = UIManager.getColor("Table.focusCellBackground");
          foreground = UIManager.getColor("Table.focusCellForeground");
     else if (hasFocus) {
          highlightBorder = UIManager.getBorder
          ("Table.focusCellHighlightBorder");
          if (isCellEditable(row, column)) {
          background = UIManager.getColor
               ("Table.focusCellBackground");
          foreground = UIManager.getColor
               ("Table.focusCellForeground");
     visibleRow = row;
     setBackground(background);
     TreeCellRenderer tcr = getCellRenderer();
     if (tcr instanceof DefaultTreeCellRenderer) {
          DefaultTreeCellRenderer dtcr = ((DefaultTreeCellRenderer)tcr);
          if (isSelected) {
          dtcr.setTextSelectionColor(foreground);
          dtcr.setBackgroundSelectionColor(background);
          else {
          dtcr.setTextNonSelectionColor(foreground);
          dtcr.setBackgroundNonSelectionColor(background);
     return this;
* An editor that can be used to edit the tree column. This extends
* DefaultCellEditor and uses a JTextField (actually, TreeTableTextField)
* to perform the actual editing.
* <p>To support editing of the tree column we can not make the tree
* editable. The reason this doesn't work is that you can not use
* the same component for editing and renderering. The table may have
* the need to paint cells, while a cell is being edited. If the same
* component were used for the rendering and editing the component would
* be moved around, and the contents would change. When editing, this
* is undesirable, the contents of the text field must stay the same,
* including the caret blinking, and selections persisting. For this
* reason the editing is done via a TableCellEditor.
* <p>Another interesting thing to be aware of is how tree positions
* its render and editor. The render/editor is responsible for drawing the
* icon indicating the type of node (leaf, branch...). The tree is
* responsible for drawing any other indicators, perhaps an additional
* +/- sign, or lines connecting the various nodes. So, the renderer
* is positioned based on depth. On the other hand, table always makes
* its editor fill the contents of the cell. To get the allusion
* that the table cell editor is part of the tree, we don't want the
* table cell editor to fill the cell bounds. We want it to be placed
* in the same manner as tree places it editor, and have table message
* the tree to paint any decorations the tree wants. Then, we would
* only have to worry about the editing part. The approach taken
* here is to determine where tree would place the editor, and to override
* the <code>reshape</code> method in the JTextField component to
* nudge the textfield to the location tree would place it. Since
* JTreeTable will paint the tree behind the editor everything should
* just work. So, that is what we are doing here. Determining of
* the icon position will only work if the TreeCellRenderer is
* an instance of DefaultTreeCellRenderer. If you need custom
* TreeCellRenderers, that don't descend from DefaultTreeCellRenderer,
* and you want to support editing in JTreeTable, you will have
* to do something similiar.
public class TreeTableCellEditor extends DefaultCellEditor {
     public TreeTableCellEditor() {
     super(new TreeTableTextField());
     * Overridden to determine an offset that tree would place the
     * editor at. The offset is determined from the
     * <code>getRowBounds</code> JTree method, and additionally
     * from the icon DefaultTreeCellRenderer will use.
     * <p>The offset is then set on the TreeTableTextField component
     * created in the constructor, and returned.
     public Component getTableCellEditorComponent(JTable table,
                              Object value,
                              boolean isSelected,
                              int r, int c) {
     Component component = super.getTableCellEditorComponent
          (table, value, isSelected, r, c);
     JTree t = getTree();
     boolean rv = t.isRootVisible();
     int offsetRow = rv ? r : r - 1;
     Rectangle bounds = t.getRowBounds(offsetRow);
     int offset = bounds.x;
     TreeCellRenderer tcr = t.getCellRenderer();
     if (tcr instanceof DefaultTreeCellRenderer) {
          Object node = t.getPathForRow(offsetRow).
          getLastPathComponent();
          Icon icon;
          if (t.getModel().isLeaf(node))
          icon = ((DefaultTreeCellRenderer)tcr).getLeafIcon();
          else if (tree.isExpanded(offsetRow))
          icon = ((DefaultTreeCellRenderer)tcr).getOpenIcon();
          else
          icon = ((DefaultTreeCellRenderer)tcr).getClosedIcon();
          if (icon != null) {
          offset += ((DefaultTreeCellRenderer)tcr).getIconTextGap() +
               icon.getIconWidth();
     ((TreeTableTextField)getComponent()).offset = offset;
     return component;
     * This is overridden to forward the event to the tree. This will
     * return true if the click count >= 3, or the event is null.
     public boolean isCellEditable(EventObject e) {
     if (e instanceof MouseEvent) {
          MouseEvent me = (MouseEvent)e;
          // If the modifiers are not 0 (or the left mouse button),
// tree may try and toggle the selection, and table
// will then try and toggle, resulting in the
// selection remaining the same. To avoid this, we
// only dispatch when the modifiers are 0 (or the left mouse
// button).
          if (me.getModifiers() == 0 ||
me.getModifiers() == InputEvent.BUTTON1_MASK) {
          for (int counter = getColumnCount() - 1; counter >= 0;
               counter--) {
               if (getColumnClass(counter) == TreeTableModel.class) {
               MouseEvent newME = new MouseEvent
               (JTreeTable.this.tree, me.getID(),
                    me.getWhen(), me.getModifiers(),
                    me.getX() - getCellRect(0, counter, true).x,
                    me.getY(), me.getClickCount(),
me.isPopupTrigger());
               JTreeTable.this.tree.dispatchEvent(newME);
               break;
          if (me.getClickCount() >= 3) {
          return true;
          return false;
     if (e == null) {
          return true;
     return false;
* Component used by TreeTableCellEditor. The only thing this does
* is to override the <code>reshape</code> method, and to ALWAYS
* make the x location be <code>offset</code>.
static class TreeTableTextField extends JTextField {
     public int offset;
     public void reshape(int x, int y, int w, int h) {
     int newX = Math.max(x, offset);
     super.reshape(newX, y, w - (newX - x), h);
* ListToTreeSelectionModelWrapper extends DefaultTreeSelectionModel
* to listen for changes in the ListSelectionModel it maintains. Once
* a change in the ListSelectionModel happens, the paths are updated
* in the DefaultTreeSelectionModel.
class ListToTreeSelectionModelWrapper extends DefaultTreeSelectionModel {
     /** Set to true when we are updating the ListSelectionModel. */
     protected boolean updatingListSelectionModel;
     public ListToTreeSelectionModelWrapper() {
     super();
     getListSelectionModel().addListSelectionListener
     (createListSelectionListener());
     * Returns the list selection model. ListToTreeSelectionModelWrapper
     * listens for changes to this model and updates the selected paths
     * accordingly.
     ListSelectionModel getListSelectionModel() {
     return listSelectionModel;
     * This is overridden to set <code>updatingListSelectionModel</code>
     * and message super. This is the only place DefaultTreeSelectionModel
     * alters the ListSelectionModel.
     public void resetRowSelection() {
     if(!updatingListSelectionModel) {
          updatingListSelectionModel = true;
          try {
          super.resetRowSelection();
          finally {
          updatingListSelectionModel = false;
     // Notice how we don't message super if
     // updatingListSelectionModel is true. If
     // updatingListSelectionModel is true, it implies the
     // ListSelectionModel has already been updated and the
     // paths are the only thing that needs to be updated.
     * Creates and returns an instance of ListSelectionHandler.
     protected ListSelectionListener createListSelectionListener() {
     return new ListSelectionHandler();
     * If <code>updatingListSelectionModel</code> is false, this will
     * reset the selected paths from the selected rows in the list
     * selection model.
     protected void updateSelectedPathsFromSelectedRows() {
     if(!updatingListSelectionModel) {
          updatingListSelectionModel = true;
          try {
          // This is way expensive, ListSelectionModel needs an
          // enumerator for iterating.
          int min = listSelectionModel.getMinSelectionIndex();
          int max = listSelectionModel.getMaxSelectionIndex();
          clearSelection();
          if(min != -1 && max != -1) {
               for(int counter = min; counter <= max; counter++) {
               if(listSelectionModel.isSelectedIndex(counter)) {
                    TreePath selPath = tree.getPathForRow
                    (counter);
                    if(selPath != null) {
                    addSelectionPath(selPath);
          finally {
          updatingListSelectionModel = false;
     * Class responsible for calling updateSelectedPathsFromSelectedRows
     * when the selection of the list changse.
     class ListSelectionHandler implements ListSelectionListener {
     public void valueChanged(ListSelectionEvent e) {
          updateSelectedPathsFromSelectedRows();

How to make a particular site password protected.

Hi,
Could you please tell me how to make a particular site to be password protected . Could you give me necessary code. I want a seperate login page to be opened when a particular site is opened.
Edited by: vemana on Jan 1, 2008 10:37 PM

I infer that you want to login validation on your webpages right.
Ask user name and password from the user(using html or jsp), and submit those information to server. you can validation user information in server(using servlet). then redirect to client(JSP, html) according to login info.
This is swing forum. Web Tier APIs topic is there for web page related questions. so next time onwards post there itself.

How to make jsp as a Dispatcher

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