Using ServletContext in JSP

I am trying to use the ServletContext in a JSP from a servlet that has not been accessed yet...is this possible? Or could I just create an instance of it in the jsp to use it...for ex)
MyJSP.jsp...
MyServlet servlet = new servlet();
ServletContext context = MyServlet.getContext();
Thanks,
jesse

gypsy617's right, it's application, not pageYes,thanks Leo, it is 'application indeed, however I took back my statement because I'm not sure that that was the answer that the poster wanted...
Are the JSP and the servlet in the same app context, or do you want to call a servlet in another context ?

Similar Messages

Initializing JSPs using ServletContext

Hi
I have only the reference of a ServletContext object and I want to use this object for compiling a particular JSP file.
I am trying to use RequestDispatcher's forward and include methods but they require ServletResponse and ServletRequest objects (which I dont have).
So, is there a way to create dummy ServletResponse and ServletRequest objects ? or Is there any other way I can use ServletContext for this task ?
Thanks in Advance
Varun

Yes, if you forward your request from the servlet to the JSP:
request.getRequestDispatcher("/path/to/my.jsp").forward(request, response);You can then retrieve the request and response form the JSP's PageContext:
<%
ServletRequest request = pageContext.getRequest();
%>Is this what you mean? Or are you wanting to initialize a JSP through init-params? I can't exactly tell from your question.

Associating two events with submit button using javascript in jsp

Hi
How can i Associate two events with submit button using javascript in jsp. Firstly it should insert the data to database and secondly it should close the same pop-up window

Have something like :
<input type="submit" name="submitbtn" value="Click me" onClick="function1(); function2(); " />
You just call both functions sequentially, it's that simple. Although using javascript to work with a database, that seems a bit tricky.

Error while using Beans in JSP

I am using netbeans to develop the applications and am using tomcat version (jakarta-tomcat-4.1.18).
When I execute the following program i get the below mentioned error::
StringBean.java
package test;
import java.beans.*;
public class StringBean {
private String message = "No message SPECIFIED";
public String getMessage() {
return message;
public void setMessage(String message) {
this.message = message;
StringBean.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Using JavaBeans with JSP </TITLE>
<LINK REL=STYLESHEET HREF="JSP-Styles.css" TYPE="text/css" >
</HEAD>
<body
<jsp:useBean id = "SB" class = "test.StringBean" />
initial value is : <jsp:getProperty name = "SB" property= "message"/>
<jsp:setProperty name= "SB" property = "message" value= "this the message after the change"/>
final value is :<jsp:getProperty name = "SB" property= "message"/>
</body>
</HTML>
javax.servlet.ServletException: test/StringBean
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.service(IDEJspServlet.java:349)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
     at java.lang.Thread.run(Thread.java:536)
Root Cause
java.lang.NoClassDefFoundError: test/StringBean
     at java.lang.Class.getDeclaredConstructors0(Native Method)
     at java.lang.Class.privateGetDeclaredConstructors(Class.java:1590)
     at java.lang.Class.getConstructor0(Class.java:1762)
     at java.lang.Class.newInstance0(Class.java:276)
     at java.lang.Class.newInstance(Class.java:259)
at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.load(IDEJspServlet.java:106)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.loadIfNecessary(IDEJspServlet.java:150)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet$JspServletWrapper.service(IDEJspServlet.java:160)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.serviceJspFile(IDEJspServlet.java:246)
     at org.netbeans.modules.tomcat.tomcat40.runtime.IDEJspServlet.service(IDEJspServlet.java:339)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
     at java.lang.Thread.run(Thread.java:536)

Ok The class isn't found, so your classpath settings of netbeans (if you are using the run function in netbeans) isn't set.
and if you aren't using netbeans to run it, then the class isn't in the webapp/WEB-INF/classes
good luck

Help me!! How to use JavaScript with JSP ??

I am using JDeveloper and I created a screen in JSP which uses a bean for database connectivity and retriving info onto the page.
The page has a ListBox where list items are populated from the database.My requirement is
whenever the list is changed the page shuold be refreshed with the selected item info.
I tried to use 'JavaScript' for triggering the event with 'onChange' event of the ListBox.But the event is not getting invoked. I think JavaScript is not working with JSP.
Please help me with how to Use javaScript with JSP or any other alternative where I can meet my requirement.
I have one more question...I have gone through the JSP samples in OTN and I am trying do download the sample 'Travel servlet' which show list of countries...etc
I have also gone through the 'readme' but I don't know how to extract .jar file.
I would be great if you could help me in this.
Thanks!!
Geeta
null

We have a similar need. We have used Cold Fusion to display data from Our Oracle Database. We have a simple SElect Box in HTML populated with the oracle data. When someone selects say the State of Pennsylvania. then we have an On change event that runs a Javascript to go get all the cities in Pennsylvania.
Proble we are having is that inorder for the Javascript to work , we currently have to send all the valid data.
Do you know of any way to dynamically query the the Oracle database in Javascript

How to use EJB in JSP...urgent!!!

hello,
i am novice programmer in EJB.
i am using weblogic 6.1 ...
my problem is how to use EJB in jsp page.
my code is as follow..but its not displaying any result.
<%@ page import="javax.naming.InitialContext,
javax.naming.Context,
java.util.Properties,
firstEJB.First,
firstEJB.FirstHome"%>
<%
     long t1 = System.currentTimeMillis();
     System.out.println(t1);
     Properties props = new Properties();
     p.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.TengahInitialContextFactory");
     props.put(Context.PROVIDER_URL, "localhost:7001");
     Context ctx = new InitialContext(props);
     FirstHome home = (FirstHome)ctx.lookup("FirstEJB");
     First bean = home.create();
     String time = bean.getTime();
     bean.remove();
     ctx.close();
     long t2 = System.currentTimeMillis();
%>
<html>
     <head>
          <style>p { font-family:Verdana;font-size:12px; }</style>
     </head>
     <body>
          <p>Message received from bean = "<%= time %>".<br>Time taken :
          <%= (t2 - t1) %> ms.</p>
     </body>
</html>
please tell me the solution.

Hi, I don't know if it may be the cuase of your problems, but you should narrow the Object obtained doing the lookup, like this:
FirstHome home = (FirstHome) PortableRemoteObject.narrow(ctx.lookup("FirstEJB"), FirstHome.class);

When to use servlets and jsp in an application like shoping cart?

Hi All
I m going to design and implement a web application using servelts and jsp. I am still at its requirements analyze stage.
The application is almost likely a shopping cart. So if any of you have the deep knowledge about this domain with servlets and jsp please help me for a good design. What I realy need to know is that
1. what are the core requirements for a shoping cart ?
2. use cases ?
3. best way to follow mvc with servlets and jsp for it?
you can answer to this at the abstract level. no need to go in detail.
if you have any documents like design and use cases mail me to [email protected]
your cooperation is highly appreciated in this regards.

Look into this kid
http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/Servlet-Tutorial-Session-Tracking.htm

How to create an InputSelect using ADF and JSP

I looking for some docs/instructions on creating "an InputSelect using ADF with JSP".
Thanks,
BG...

Ok here are the Steps
1) Open the JSP editor for the page in Question.
2) In the Data Control palette select the item that you want to become the poplist and change the "Drop As" poplist to "Single Select List"
3) Drag the field into the page. You'll get an empty poplist which implements the <html:select> and <html:optionsCollection> tags.
4) With the JSP editor still open click on the "UI Model" sub-tab in the Structure pane
5) Select the field you've just dragged in - then right click to get the context menu and choose "edit"
6) Change the List Binding Mode poplist to "LOV Mode"
You're then taken into a couple of screens where you can select the Source VO for the poplist, and the destination dataset, along with the thing you want for the Label and the Value.

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

Connecting to MSAcess database using JDBC in JSP

Hi,
I have created an Aceess database file (C:\db1.mdb) and created a DSN=db1.
I could able to connect to the database and retrieve the information from the tables using Sun's JDBC OdBc bridge drivers.
DriverManager.getConnection("jdbc:odbc:db1").
It was working Fine in my Standalone java program.
But,when I used the database connection statements in my JSP page,it is not displaying any error message and not selecting rows from the Select statement i used in my JSP page.(The same worked in my standalone Java program).
I executed the two programs on same machine.Database is also on the same machine.
Can anyone tell me what shall i do to connect to the database(C:\db1.mdb) through JSP.
Thanks in Advance
Rao...

in your code do you have any things that is suppressing your exception?? i.e. something lik
try
// do your stuff
catch(Exception e)
// do nothing??
}if so you vont get to know of any problem that happened....
also if there is an un handled exception the jsp page will sometimes come up as blank, because your print streem will be terminated abrubtly....
this will probably happen if you dont have a try - catch block at all, or if you are not handling the exception that is being thrown.... try inclosing your code in a try catch block and doing ex.priintStackTrace() in the catch block to get the exception trace on the server console....
also can you post some code for both your java client and jsp??

Using SQLJ from JSP in JDeveloper

Hello,
Has anyone succeeded in creating a JSP file by using SQLJ in JDeveloper 3.1 (Build 681)?
In the whitepaper http://technet.oracle.com/docs/tech/java/servlets/jsp/whitepapers/jsp-oow99-paper.pdf
it is stated that you can create an SQLJ-JSP by giving the JSP file the .sqljsp extension. This results in an "Fatal error: compiler internal error." in JDeveloper.
In the same whitepaper, it is stated that you can also use the following JSP page directive to create an SQLJ-JSP page:
"<%@ page language="sqlj" %>"
This results in an "Error: (16) illegal character." error in JDeveloper at the mere sight of "#sql".
Any help would be appreciated.
Helgi

Hi,
there is something wrong with the code.
I will update you when it is fixed
(1352536)

How to use JOptionPane in jsp, instead of javascript message alert box?

HI,
How to use JOptionPane in jsp,
instead of javascript "message alert box"?
I hate javascript,
I'd like to only use java in jsp. don't use javascript.
javascript is client side,
jsp is server side. i know that.
how to... instead of javascript box?
how to use ... message box in webpage?
don't use applet,,,, don't use javascript,,,
hm...zzzZzz
I hate javascript..T.T
<SCRIPT language=JavaScript>
alert("hate javascript");
</SCRIPT>
===>>>>
In this way,,
JOptionPane.showOptionDialog(null,"I love java")
I'd like to only use jsp and java and html...in webpage.
don't use javascript....
Why? don't sun provide message box in jsp, instead of javascrip box?
Why?
Edited by: seong-ki on Nov 4, 2007 8:38 PM

Drugs are bad, m'kay?

How to use XMHTTP in jsp

Hello,
can any body tell me how to use the XMHTTP in jsp programming are servlet..what i know is XMLHTTP used in with java script functions..for connecting to servers without refrshing the page.can we use directly in jsp page.if so which APIs we have to use..provide me some help..
regards,

Thanks Steve for ur reply..
XMLHTTP is a microsoft related thing..How so? This code works with Firefox & IE6 on Tomcat 5:
<%
String aStr = request.getParameter("a");
String bStr = request.getParameter("b");
String cStr = "";
int a,b,c;
if (aStr != null && bStr != null) {
     a = Integer.parseInt(aStr);
     b = Integer.parseInt(bStr);
     c = a + b;
     cStr = ""+c;
} else {
     aStr = "";
     bStr = "";
String acc = request.getHeader("Accept");
if (acc!=null && acc.indexOf("message/x-jl-formresult")!=-1) {
   try { out.print(cStr.trim()); } catch (Exception e) { e.printStackTrace(); }
} else {
%>
<html>
     <head>
         <title>Add</title>
     </head>
     <body>
          <script>
               var xmlhttp=false;
                try {
                 xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
                } catch (e) {
                 try {
                  xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                 } catch (E) {
                  xmlhttp = false;
               if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
                 xmlhttp = new XMLHttpRequest();
               function calc() {
                try {
                 frm=document.forms[0]
                 url="addbyxmlhttp.jsp?a="+frm.elements['a'].value+"&b="+frm.elements['b'].value
                 xmlhttp.open("GET",url,true);
                 xmlhttp.onreadystatechange=function() {
                  if (xmlhttp.readyState==4) {
                   document.forms[0].total.value=xmlhttp.responseText;
                xmlhttp.setRequestHeader('Accept','message/x-jl-formresult');
                xmlhttp.send(null);
                } catch(E) { alert (E.message); }
                return false
          </script>
          <form action="addbyxmlhttp.jsp" method="get" onsubmit="return calc();">
               <input type="text" name="a" value="<%=aStr%>"/> +
               <input type="text" name="b" value="<%=bStr%>"/> =
               <input type="text" name="total" value=""/>
               <input type=submit value="Calculate">
          </form>
     </body>
</html>
<%
%>That is a direct translation from one of the examples on the page I pointed to earlier.
do we have any
apis in java insteead of
var xmlhttp = new
ew ActiveXObject("Microsoft.XMLHTTP");
var xml_dom = new
new ActiveXObject("MSXML2.DOMDocument");
var xml_domTemp = new
new ActiveXObject("MSXML2.DOMDocument");
these things i want to use java related stuff..is it
possible..
regards,Those things are JAVASCRIPT!! Like I said, most of the work is done in javascript, not the server side stuf.. And the page I pointed you to answers that question.

How To Use EJB in JSP

I've used beans in JSP.. but how to use EJB's in beans ??
EJB's are deployed in Oracle 8i
Please Help
Thank You.

Please find the answer in this HOWTO:
http://technet.oracle.com:89/ubb/Forum2/HTML/006404.html
HOWTO's are archived on the JDeveloper Documentation page:
http://technet.oracle.com/docs/products/jdev/listing.htm (Click on Documentation Tab)
Thanks,
-Roel.

How to use EL in JSP

Hi,
I am trying to use EL in JSP,as EL syntax is ${first.secondvalue},but whenever i write this in my program and i run it,it is showing like this only not the value which it has to show.
I think that EL is not being enabled in my jsp.
I write <jsp-property-tag> in web.xml (DD)to enable it,but still it is not being enabled.
So help me so that I can run EL in my JSP page.
BR//
Anubhav Gulati

Google is your friend, so search on Google for Tomcat 6.0 and it will show you were you can get it from.
Take a look at the Apache Tomcat Version Chart here:
http://tomcat.apache.org/whichversion.html
Servlet 2.5/ JSP 2.1 -------------- Tomcat 6.0.10
Servlet 2.4/ JSP 2.0 -------------- Tomcat 5.5.23
Since you want Servlet 2.4 and JSP 2.0 which are required for JSTL 1.1, you could get Tomcat 5.5.x , instead of Tomcat 6.0.x
Although I don't know if Tomcat 6 is backwards compatible with Servlet 2.4 and JSP 2.0 , if it is then it's cool to get Tomcat 6.x
web.xml - Servlet 2.4 Version
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
      xmlns="http://java.sun.com/xml/ns/j2ee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
</web-app>-----------------------------------------------------
web.xml Servlet 2.5 version is different
<?xml version="1.0"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" version="2.5">
</web-app>

Using ServletContext in JSP

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