Make Taglib with JSP

Dear all,
I didn't work on JSP with JSTL. If anyone can help me in this regard for making a simple JSP page with JSTL, it will be highly appreciable.
I am working on Tomcat 5.0.
Thanks for ur time

What do you mean 'help' ?
I would advice you to make a start by reading up the documentation here - http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSTL.html#wp74644, to download the tag libraries here - http://java.sun.com/products/jsp/jstl/index.jsp (there's also a documentation)
and start putting pages using jstl.
When you are stuck up, come here by all means, post your problems and people would only be too happy to aid you. A generic shout for 'help' like the one in your post wouldnt get much response.
cheers,
ram.

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Why JavaBeans with JSP

Hi,
I know its an easy question and probably a silly one to ask, but still please take time to answer this. Why do we use JavaBeans with JSP to make use of reusable code. Cant we use simple classes for this?
Thanks in advance

Hi,
JavaBeans technology is the component architecture for the Java 2 Platform, Standard Edition (J2SE). Components (JavaBeans) are reusable software programs that you can develop and assemble easily to create sophisticated applications. By using Java beans, JSP allows you to keep much more of your code separate from the html than other html embedded languages. Java beans basically let you keep all the logic of your page (like the code to connect to a database, manipulate data etc�) in a separate file known as a Java bean. Then from within your html page - all you do is use one tag to 'use' the bean, and then a few other short tags to send data to and from the bean.
the website http://java.sun.com/products/jsp/html/jsptut.html is a good start, simple and easy understand.
Good luck!
jmling

How to use taglibs in JSP for Database access

Hi
Could any one please tell me how to use taglibs in JSP for Database access
with regrds
Jojo

This is a sample how to connect to a MySQL database with JSTL 1.0:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>JSTL MySQL</title>
<link href="styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
<c:catch var="e">
<sql:setDataSource var="datasource" url="jdbc:mysql://Your_Server_Name_Here/You_Schema_Here"
                       user="Your_Username_Here" password="Your_Password_Here"
                       driver="com.mysql.jdbc.Driver"/>
<c:out value="datasource= ${datasource}, Class = ${driver.class}"/>
<br />
<br />
<sql:query var="deejays" dataSource="${datasource}">SELECT * FROM Your_Table_Name_Here</sql:query>
<table>
<%-- Get the column names for the header of the table --%>
<c:forEach var="columnName" items="${deejays.columnNames}"><th><c:out value="${columnName}"/></th></c:forEach>
<tbody>
<%-- Get the value of each column while iterating over rows --%>
<c:forEach var="row" items="${deejays.rows}">
<tr><c:forEach var="column" items="${row}">
        <td><c:out value="${column.value}"/></td>
      </c:forEach>
</tr>
</c:forEach>
</tbody>
</table>
</c:catch>
<br />
<br />
<c:if test="${e!=null}"><span class="error">Error</span>�
<c:out value="${e}" />
</c:if>
</body>
</html>And this thread might help you:
http://forum.java.sun.com/thread.jspa?threadID=639471&tstart=44

Set headers with jsp

hi,
i try to make a download page with jsp. here is my code:
<%@ page import="java.io.*,javax.servlet.*,java.util.* "%>
<%
String filename = "super.zip";
response.setContentType("application/octet-stream");
response.setHeader("Content-Disposition","attachment; filename=\""+filename+"\"");
response.setHeader("Pragma","Public");
//is it correct to set headers like this
       FileInputStream fis = null;
       BufferedInputStream bis = null;
       ByteArrayOutputStream baos = null;
       int aux;
       try
                 File f = new File("c:\\" + filename);
                 fis = new FileInputStream(f);
                 bis = new BufferedInputStream(fis);
                 baos = new ByteArrayOutputStream();
               while ((aux = bis.read())!=-1)
                    baos.write((byte)aux);
               baos.writeTo(response.getOutputStream()); //is it correct to return the content to browser like this
       finally
               if (bis != null)
                    bis.close();
%>and the error i get is
getOutputStream() has already been called for this response
i need immediate help. i hope someone knows the answer. thanks...

Hi,
I had the same problem yesterday then I found the answer here:
http://forum.java.sun.com/thread.jsp?forum=45&thread=373667
The issue is that you can not have PrintWriter and OutputStream at
the same time.
Rachel

Generaating new doc file with jsp servlet.

Hi friends,
I developed an application with JSP
In that i need a data to be fetched nd write in .doc file.
I mean I want to create new word file nd get my data in that
like reports generation.
How can i make this.
help me pls

.doc file: I don't think there is any reporting tool that creates .doc. You can create .rtf files with Oracle Reports and many other tools.

Best way to create, modify, XML with JSP ? HELP

Hi friends,
As i am new to XML,
I know there are two APIs used for XML processing, i want to know as a begineer level, which API
is easy and good to implement XML with JSP.
1) SAX
2) DOM
i want to make a log file in XML, so on web page it will be displayed on HTML form through XSL.
Since there is good tutorial on http://www.w3schools.com/dom
but i think its HTML dom
I want XML procession through JAVA CODE , what should i use ? and give some good tutorials on XML DOM
that is used with JAVA / JSP.
HELP.
Edited by: Ghanshyam on Sep 19, 2007 3:24 PM

Well what i think is you gonna checkout with your requirements before implementing any of the popular XML parsing mechnisms.
If you are intrested in faster processing @sacrifising a gud amount of your Memory,DOM is the one which you are looking for.
If you are instrested in Managing your memory and but if you are ok with sacrifising speed SAX is the best solution.it works on what is called a push technology.
and if you think either way you might have to look towards a pull parser which is StAX (Streaming API for XML Parsing)
it'd be a gr8 idea if you can go through the below article which explians about each of the parsing mechanisms
http://www.stylusstudio.com/xml/parser.html#*
coming back to helpful resources as far java is concern checkout the below link which might be of some help.
and the main thing is that all of these parser there is a defined specification you might find implementations of different vendors on this.
eg:Sun Provides one with JDK itself,same as IBM provides one,oracle does the same & so on...
your first task would be to focus on one such implementation which can cater your requirements.
DOM:*
Basic Parsing Objects / Interfaces Involved while DOM parsing:
http://www.w3.org/TR/DOM-Level-2-Core/java-binding.html
Breif Overview & few important API details:
http://www.developerlife.com/domintro/default.htm
Simple Example:
http://www.brics.dk/~amoeller/XML/programming/domexample.html
Others:
http://www.roseindia.net/xml/dom/
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JAXPDOM.html#wp79994
http://java.sun.com/webservices/jaxp/dist/1.1/docs/tutorial/dom/1_read.html
SAX:*
http://www.javacommerce.com/displaypage.jsp?name=saxparser1.sql&id=18232
http://java.sun.com/webservices/jaxp/dist/1.1/docs/tutorial/sax/index.htm
http://java.sun.com/developer/Books/xmljava/ch03.pdf
http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JAXPSAX.html#wp69937
http://www.onjava.com/pub/a/onjava/excerpt/java_xslt_ch5/index.html?page=6
StAX:*
http://java.sun.com/webservices/docs/1.6/tutorial/doc/SJSXP2.html
http://javaboutique.internet.com/tutorials/stax/
http://today.java.net/pub/a/today/2006/07/20/introduction-to-stax.html
Hope this might be of some help :)
REGARDS,
RaHuL
http://weblogs.java.net/blog/spericas/archive/2006/04/sun_stax_parser.html

HOW can I call EJB with JSP?

Hi, I'm working with JSP and want to include some EJB. I dont know how can I access EJB through JSP. I dont know if I use the right code in JSP for calling EJB. Did someone know how to use that? Can someone tell me if is the right code in JSP in my example?
Thanks, Kristjan
THIS IS THE JSP: (useejb.jsp)
<%@ taglib uri="http://xmlns.oracle.com/j2ee/jsp/tld/ojsp/ejbtaglib.tld" prefix="EJB" %>
<%@ page import="mypackage1.MySessionEJB" %>
<%@ page import="mypackage1.MySessionEJBHome" %>
<%@ page import="mypackage1.impl.MySessionEJBBean" %>
<HTML>
<head><TITLE>USEBEAN</TITLE></head>
<body>
<EJB:useHome id="mySessionEJBHome" type="mypackage1.MySessionEJBHome" location="java:comp/env/ejb/mySessionEJB" local="false" />
<EJB:useBean id="mySessionEJBBean" type="mypackage1.impl.MySessionEJBBean" local="false">
<EJB:createBean instance="<%=mySessionEJBHome.create() %>" />
</EJB:useBean>
<%= mySessionEJBBean.calc() %>
</body>
</html>
THIS IS THE EJB CODE:(MySessionEJBBean.java)
package mypackage1.impl;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import java.lang.String.*;
public class MySessionEJBBean implements SessionBean
public void ejbCreate(){}
public void ejbActivate(){}
public void ejbPassivate(){}
public void ejbRemove(){}
public void setSessionContext(SessionContext ctx){}
public String calc(String value)
return value + value;
public String zanka(String x)
return x;
(MySessionEJB.java)
package mypackage1;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface MySessionEJB extends EJBObject
public String calc(String value) throws RemoteException;
String zanka(String x) throws RemoteException;
(MySessionEJBHome.java)
package mypackage1;
import javax.ejb.EJBHome;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
public interface MySessionEJBHome extends EJBHome
public MySessionEJB create() throws RemoteException, CreateException;
}

You might want to look at using a Java Bean wrapper, this can be done automically using WebSphere. It creates what is called an access bean which the JSP imports.
HTH,
J.Clancey

How to read *.txt files with JSP?

I have to make a homepage that searches for information on a text file.
My text file is described below.
username=Hanako Sony
cpname=Sony Corporation
cpcode=500100
So, if the user inputs "username", then "Hanako Sony" should be returned. If the user inputs "cpname", then "Sony Corporation" should be returned and so on.
Can anyone help me with this? Can this be done with JSP?
Thanks,
Rob

Try this,
<%@ page import="java.io.*,java.util.*" %>
<%
RandomAccessFile raf = new RandomAccessFile("../webapps/test/jsp/Info.txt","r");
String qInfo = request.getParameter("qInfo");
String tInfo="";
if(qInfo != null) {
     String line="";
     while((line = raf.readLine()) != null) {
          StringTokenizer st = new StringTokenizer(line,"=");
          if(st.hasMoreTokens()) {
               if(st.nextToken().equalsIgnoreCase(qInfo))
                    tInfo = st.nextToken();
     if(tInfo.equals("")) tInfo="Property Not found ???";
} else {
     qInfo="";
%>
<form name=myform action="" method="get">
<table><tr>
<td>What do you want : </td><td><input type = text name="qInfo" value="<%=qInfo%>"></td></tr>
<tr><td>Here is the information : </td><td><input type = text name="tInfo" value="<%=tInfo%>"></td></tr>
<tr><td><input type="submit" name"sub"></td></tr>
</table>
</form>Here info.txt is your text file. Use the relative path accordingly.
Hope this helps.
Sudha

Calling custom tags in jsp with jsp:include

Hi,
I have a large jsp file , which uses jstl fmt tags for labels.
Since the size of jsp was too big iand i was unable to compile it because of 64 kb class size limit,
I removed the tag lib defination from the jsp file and put it in another jsp file. and used jsp:include to include this file inside the first jsp.
It is compiling successfully but labels r not showing up.
but when i use <%@include to include second jsp in the first one i get the labels properly.
I cannot use <%@include as this starts giving me compilation error related with jsp class file size beyond 64 kb.
Pls suggest why jsp:include is not working.
thanks,
Pramod

Hi Anil,
Ur suggestion was good but could not solve my problem.
I have put a small sample code to illustrate the problem.
labeldemo.jsp:
<%-- <%@ include file="WDCComInitLabelsjunk.jsp" %> --%>
<jsp:include page="WDCComInitLabelsjunk.jsp" flush="true" />
<table width="100%" cellpadding="3" cellspacing="0" border="0" class="tablebg">
                              <tr class="headtd">
                                   <td colspan="4"><span class="headtext"><fmt:message key="Cash_Management"/> </td>
                              </tr>
                              <tr> hi </tr>
                         </table>
                         </fmt:bundle>
WDCComInitLabelsjunk.jsp:
<%@ page language="java" %>
<%@ page contentType="text/html"%>
<%@ page import="com.tcs.wdc.core.*" %>
<%@ page import="com.tcs.wdc.core.login.*" %>
<%@ page import="com.tcs.wdc.core.service.navigation.*" %>
<%-- Include tag library --%>
<%@ taglib uri="/WEB-INF/tld/fmt.tld" prefix="fmt" %>
<%-- Get language from IDCUserSession & set it in session --%>
<%
/*SessionManager sm = new SessionManager(session);
IDCUserSession ius = sm.getIDCUserSession();*/
session.setAttribute("language","nl_NL");
%>
<%-- Set the locale for the language obtained --%>
<fmt:setLocale value="${language}" />
<fmt:bundle basename="labels" />
If i uncomment the <%@ include file="WDCComInitLabelsjunk.jsp" %> tag in the code above it is working fine ,
but it is not working with <jsp:include page="WDCComInitLabelsjunk.jsp" flush="true" />
pls suggest.
Thanks,
Pramod

Path Pronlem with jsp:plugin 's codebase

I am unable to call my JApplet Class with <jsp:plugin> tag in my JSP Page. I have tried almost every combination for codebase (absolute and relative paths ) but still there is an Error ClassNotFound .
Please tell me the right way to call the Applet in JSP.
along with a small example ...
Jsp and the Class File exists in Different directories in My Web Project.

Well, then I would just put in the object/embed tags yourself. You can get whatever the plugin tag writes by just using the tag once with static values and view the source in the browser and copy it out, then replace whatever values with scriptlets (or other taglib tags) to fill in the correct values.

How to combine with JSP??

I am a newble to Flex 2
I am confuse that how can i combine with JSP to send and
retrive data with mysql ??
I have seen some examples that juz make a linking with jsp
which is printed to XML format for data extracting.
But how to insert and retrive data dynamically?
Some people say that it can directly programming mxml in .jsp
by importing mxml tag library....and finally complie on the web
server. But .... Wazz is the reason i have to buy flex builder.....
Are there any way i can program with jsp in flex 2 ?
i am sorry for my poor english
any help will be highly appreciated

Eran,
Can you elaborate on what you're looking for?
UCM comes with a number of sample custom element forms. These forms are leveraged within a pretty strict context of the site studio contributor. The primary api is javascript based.
I don't believe you would be restricted on the types of custom element forms you can create if you're implementing into a jsp/x site. I believe the issue is mostly dependent on how you're calling the SS contributor.
-ryan

Help with JSP and logic:iterate

I have some queries hope someone can help me.
I have a jsp page call request.jsp:
====================================
<%@ page import="java.util.*" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html>
<body>
   <%@ page import="RequestData" %>
   <jsp:useBean id="RD" class="RequestData" />
   <%Iterator data = (Iterator)request.getAttribute("Data");%>
   <logic:iterate id="element" name="RD" collection="<%=data%>">
      <jsp:getProperty name="RD" property="requestID" />
      <%=element%><br>
   </logic:iterate>
</body>
</html>
And I have the RequestData.java file:
======================================
private int requestID = 1234;
public int getRequestID() { return requestID; }
The jsp page display:
======================
0 RequestData@590510
0 RequestData@5b6d00
0 RequestData@514f7f
0 RequestData@3a5a9c
0 RequestData@12d7ae
0 RequestData@e1666
Seems like the requestID is not returned. Does anybody know this?
I have done the exact one using JSP and servlets, trying to learn using JSP and custom tags. The one with JSP and servlet looks like:
============================================
<%@ page import="RequestData" %>
<%Iterator data = (Iterator)request.getAttribute("Data");
while (data.hasNext()) {
   RequestData RD = (RequestData)data.next();
   out.println(RD.getRequestID() );
}%>

Oh think I got it...
but one thing I'm not sure is...
If I use "<jsp:useBean id="RD" class="RequestData" />", do I still need "<%@ page import="RequestData" %>"?
I tried without and it gives me error...

What kind of classes I can use with JSP in tomcat? Please Help

Hi people, I tried use the classes that I did for others application and it throw this exception :
"org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
D:\Apache Group\Tomcat 4.1\work\Standalone\localhost\_\matriculaOnLine\valide_jsp.java:14: cannot access matriculaOnLine.Connect
bad class file: D:\Apache Group\Tomcat 4.1\webapps\ROOT\WEB-INF\classes\matriculaOnLine\Connect.class
class file contains wrong class: Conexao
Please remove or make sure it appears in the correct subdirectory of the classpath.
private Connect conn = new Connect(driver,url,login,password);
^
1 error"
I used the Connect class with java apps and it work but with JSP on TomCat4.1.27
Can someone help me, please?
Tiago - [email protected]

Hi Tiago,
I have some problems in my mind.
Which databse you are using? and Which database driver you are using for connecting database?
Also can you please give a code snapet that you written for connecting databse?
----------Milind

How Use Multi Pages with JSP pages

I have a lot of records, so i want to display from 10 to 10 and use a numeric menu in the botton of the page. the problem is how a make that with java code and html or java script.
thanks for your help
LeonMex. from M�xico City

Search for pager taglibs. Ur solution lies there.
Moreover u can refer www.jsptags.com , I am using the pager taglib from jsptags and it's quite easy to use.
Hope that Helps.
thanks and regards.

Hide Ajax enabled portlet with jsp form loading

Hi All,
I seriously struck with this problem and any help is appreciated.
Functionality:-
I have 2 portlet in a page portletA(non ajax) and PortalB(ajax enabled and it will just handle the portletA events). For checkbox event on portletA i am submitting PortletB JSP Form through PortletA JavaScript.
PortletB jsp Form consists of only hidden variables, which will be set by PortletA JavaScript. All this is working fine.
Problem:-
My problem is I have to hide PortletB.For this i am using BackingFile preRender method. If I hide portletB then JSP Form is not loading and from PortletA iam unable to get the Form object of portletB to submit.
Even setVisible is not working.
Here is my PortletB jsp Form
<netui:form tagId="ajaxEnabledForm" action="deleteRSAandCMFProfile">
<netui:hidden dataSource="actionForm.userName" tagId="userName"></netui:hidden>
</netui:form>
How to make PortletB invisible with jsp form loading?
Thanks in advance.

hi, i don't have the exact solution to your problem, but can suggest you work around.
in portlet b jsp, add <div> tag at the top, and use its style properties to hidden/visible as per your need. from the backing file you can set a request attribute which determines the hiding and showing in the div tag.
you may not be able to control the visibility of title bar. for this, there are two options.
1. you can try to use portlet backing context tile bar and hide title bar from backing file.
2. if this does not work, then define id attribute to div tag in title bar skeleton jsp, and access that div by using id from the portlet jsp and then hide that div tag.
thanks
sampath

Make Taglib with JSP

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