Jsp+servlet web layer architecture

Who knows a tutorial about the design of a good web layer architecture?

Or look at his book:
Core Servlets and JavaServerPages by Marty Hall -- he does have it on-line at that url too.

Similar Messages

How to install eclipse and MyEclipse and use it for jsp-servlet-web service

hi ,
please help me to install eclipse 3.1 and How to integrate MyEclipse to do jsp-servlet programming and web services.
please also help me to include application server like tomcat and axis and use that environment in MyEclipse ide.
please help me.....

At the time of installation , you can't change SID XE.
After installation, you can add another service name
Check following thread for more details
Re: How to create service on Oracle 10g XE
- Virag Sharma
http://virag.sharma.googlepages.com
http://viragsharma.blogspot.com

Jsp/servlet web hosting companies?

I'm planning on building a web site and would like to do it in java using jsp/servlets/jdbc/beans, and I'm looking for a good web hosting company that would provide the above technologies. Does anyone have any recommendations or links where I could find more information?

http://www.servlets.com/isps/servlet/ISPViewAll

Using jFreeCharts with JSP-Servlet Web App

Can someone please help me to get started on using the jFreeCharts in mt JSP Servlet we app? So far I have this in my servlet but I do not know what to do from here.
protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException {
//          create a dataset...
          double[][] data = new double[][] {
          { 1.0, 4.0, 3.0, 5.0, 5.0, 7.0, 7.0, 8.0 },
          { 5.0, 7.0, 6.0, 8.0, 4.0, 4.0, 2.0, 1.0 },
          { 4.0, 3.0, 2.0, 3.0, 6.0, 3.0, 4.0, 3.0 }
          //DefaultCategoryDataset dataset = new DefaultCategoryDataset(data);
          //return DatasetUtilities.createCategoryDataset("Series ", "Factor ", data);
          CategoryDataset dataset = DatasetUtilities.createCategoryDataset("Series ", "Factor ", data);
          JFreeChart chart = ChartFactory.createBarChart(
     "Bar Chart Demo 2", // chart title
     "Category", // domain axis label
     "Score (%)", // range axis label
     dataset, // data
     PlotOrientation.HORIZONTAL, // orientation
     true, // include legend
     true,
     false
     }

the JFreeChart documentation has examples doing just that.
And if you don't know how to get a browser to call some resource from some html you should get a beginner's tutorial to html.

How to use connection pool in jsp/servlet ?

I found I can "lookup" it in either java beans/servlets/JSP using JNDI. why?
what is the best practice to use it in a jsp/servlet web app considering JNDI lookuping expensive?
Thanks!
Bo
Edited by: BobXu on Nov 17, 2008 2:27 PM
Edited by: BobXu on Nov 17, 2008 2:32 PM

Huh?
You can lookup a JNDI resource from anywhere in java code you want to. As long as you have a repository set up to search on :-)
Of course whether that resource is available or not is a different matter. If you let the server set up the JNDI resource for you, then you can't run it standalone outside the server without something else setting the same thing up :-)
So its not so much a limitation of beans, but just the environment you run the code in.
Best practice? Don't write sql queries in JSP pages :-)
For the rest you might consider the DAO pattern. Or ignore SQL altogether and let hibernate do the work there for you.
Cheers,
evnafets

How to call jsp /servlets running in different web application in tomcat

hello all,
i have 2 web applications(Charts and Reports) in the same tomcat,i want to call jsp/servlets running in the Reports webapp from Charts webapp.how do i achieve this.
thanx
ravi

You can also use getContext(String context) in the ServletContext class to get a request dispatcher.
Using the above example it would be :
// in a servlet in the charts webapp
ServletContext context = getServletContext();
ServletContext reportsContext = context.getContext("/reports");
RequestDispatcher dispatcher = reportsContext.getRequestDispatcher("/path")
dispatcher.forward(request, response);Just note, that depending on your server's configuration getContext(...) might return null.

Why PHP is better than JSP,Servlet(Java Web Apps) ?

Well, my heart says JSP, Servlets are better but rent a coder and job market, demand-supply seems to be saying a different story... ? Why we should not learn PHP then ?

dcminter wrote:
You can develop web sites in PHP in two shakes of a lambs tail. But they aren't maintainable as they would be in .NET or J2EE and again the performance (which dicates what you can do as well as scalability) is between a scripted language with buggy runtime and a compiled language with an optimized runtime so you tell me. Yes, but rather like Spinoza's argument for the existence of God, an application that has existence is more perfect than one which exists only in the conception. Even if the conceptual one is faster.
I don't denigrate languages like PHP that help novices get stuff done.
To address the OP's complaint: If one language was objectively "best" then we would only need one language. In practice they all have strengths. The more you learn the more you'll know which to use for the task at hand. That said, to learn any language (even PHP) in profound depth will take the best part of ten years and maybe longer. Sometimes expediency leads us to use the language we understand better to solve a problem for which it is not ideally suited.Eloquent - well said.
Bonus points for that Spinoza reference.
%

ERROR [org.jboss.web.localhost.Engine] StandardWrapperValve[jsp]: Servlet.s

My Code:
<%@ page import="com.tcs.utilities.ExceptionHandler" %>
<%@ page import="com.tcs.core.UserProfile" %>
<%@ page import="com.tcs.core.HelpDeskUserProfile" %>
<%@ page import="com.tcs.exception.InvalidSessionException" %>
<%@ page import="com.tcs.constants.HelpDeskConstants" %>
<%@ page import="com.tcs.utilities.LogHandler" %>
<%@ page import="com.tcs.jsp.SessionDataContainer" %>
<%@ page import="com.tcs.jsp.ContentModel" %>
<%@ page import="com.tcs.jsp.helpdesk.HelpDeskSearchResultCM" %>
<%@ page import="com.tcs.jsp.helpdesk.HelpDeskSearchResultCmd" %>
<%@ page import="com.tcs.constants.CoreConstants" %>
<%@ page import="com.tcs.constants.ExceptionTokens" %>
<%@ page errorPage="s_error.jsp" %>
<%@ include file="session_validation.jsp" %>
<%
System.out.println("recieved flag");
    LogHandler log = LogHandler.init();
%>
<%
System.out.println("recieved flag");
      UserProfile profile = (UserProfile)session.getValue(HelpDeskConstants.SESSION_PROFILE);
          if(null == profile)
               throw new InvalidSessionException();
     if(session.isNew())
          throw new InvalidSessionException();
try{System.out.println("going for search");
    HttpSession sesshome = request.getSession(false);
    if(null == sesshome.getValue(HelpDeskConstants.SESSION_PROFILE) ) {
        throw new Exception ();
System.out.println("going for search within");
    HelpDeskUserProfile objPrfl = (HelpDeskUserProfile) sesshome.getValue(HelpDeskConstants.SESSION_ADMIN);
    if (!objPrfl.isAdminFlag())
        throw new Exception();
System.out.println("going for search1");
    HelpDeskSearchResultCM cm = new HelpDeskSearchResultCM();
    HelpDeskSearchResultCmd cmd = new HelpDeskSearchResultCmd();
System.out.println("going for search2");
    cm = (HelpDeskSearchResultCM) cmd.execute( request, response );
     System.out.println("going for search2.5");
    SessionDataContainer.put(session.getId(),cm);
     System.out.println("going for search3");
     String pag="s_helpDeskSearchResult.jsp?hidComingFrom="+"SearchMenus";
%>
      <jsp:forward page="<%=pag%>"/>

<%
} catch(Exception e) {
   /*log.error(e,"p_helpDeskSearchResult.jsp",CoreConstants.HELPDESK);
    ExceptionHandler.handleJSPException(e, ExceptionTokens.HD_GET_DATA_ERROR,
                                    "p_helpDeskSearchResult.jsp");*/
                                             System.out.println("Exception is " + e.getMessage());
%>
I get the following error when i run this code.
ERROR [org.jboss.web.localhost.Engine] StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /p_helpDeskSearchResult.jsp(68,5) jsp.error.badaction
     at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
     at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
     at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:126)
     at org.apache.jasper.compiler.Parser.parseAction(Parser.java:671)
     at org.apache.jasper.compiler.Parser.parseElements(Parser.java:803)
     at org.apache.jasper.compiler.Parser.parse(Parser.java:122)
     at org.apache.jasper.compiler.ParserController.parse(ParserController.java:199)
     at org.apache.jasper.compiler.ParserController.parse(ParserController.java:153)
     at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:227)
     at org.apache.jasper.compiler.Compiler.compile(Compiler.java:369)
     at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     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:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(JBossSecurityMgrRealm.java:220)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(ContainerStatsValve.java:76)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:65)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
     at java.lang.Thread.run(Thread.java:536)

Hi,
This forum is related to sun java studio creator . Could you please post this to appropriate forum
Regards
CreatorTeam

Any good books on web application using JSP/servlet?

Does anyone know good books on how-to build enterprise web application using JSP/servlet? Aside from the book "Head First JSP/Servlet". Development using Netbeans is more preferrable.

801264 wrote:
What about the free web server? JBoss or Glassfish or something else? I prefer web/application server that is fully compatible with JEE6 (unlike Tomcat that can't handle EJB). thanksI'm a JBoss user myself, so naturally I would advise that to you if I were ignorant. I'm not however, so in stead I'll tell you to investigate yourself and see which one you prefer. Nobody is going to tell you which one to use as there is no such thing as a 'better' or 'best' server. Just different servers each with different issues.
And the community edition of JBoss has had many issues in the past (because Red Hat of course wants to advise you to go to the enterprise platform which ain't cheap), but JBoss 5.1 was a rock solid piece of software that I have had zero problems with (after reading the odd forum or two). JBoss 6 builds on top of JBoss 5.1 and provides the full JEE6 web profile; this means it does NOT provide a certified 'full' JEE6 stack yet. This means nothing however as all the services you may need in an enterprise application are already there.
BTW: for simple servlet programming, don't neglect Apache Tomcat. Its a lightweight server that just works.

What is the best editor to use for JSP/Servlet?

Hello,
What is the best editor to use for JSP/Servlet database development.
I'm looking at Dreamweaver,Java Studio Creator.
I want some thing fairly easy to use that has database helper wizards like dreamweaver.
Thanks for the help.
Frank

Is it better to have a servlet do the database work and call it from JSP?No, it's better to have persistence objects do the database work. Servlets handle HTTP requests, and JSPs are HTML factories that should be pure view.
But there are lots of ways to do things. You just have to understand the tradeoffs when you decide.
I do not want to hammer out code, I want to learn the
best way to do things from experienced developers. Sorry, sounded like you just wanted to churn stuff.
"best way" can be subjective. In one app, "best" might be "delivered fastest". For another, "best" might be "most secure" or "most easily modified" or "best performing" or whatever. You won't get a "best" answer, only different choices. And they aren't always so easy to explain or execute.
I'd recommend that you start by reading about layered applications (3-tier architectures) and MVC separation. Once you've Googled enough about that, look into a framework like Struts or Spring or WebWork. That'll help you figure out where to put each responsibility in your app.
I can use dreamweaver to create web apps, but I hate
the arrays used to define fields. It also seems not
to take advantage of connection pooling.Don't know what you're talking about here, Frank. What do fields have to do with connection pooling?
%

How to implement this function in JSP/Servlet env?

Hi all,
I working on a project, it provides functionality to upload file using JSP/Servlet. In the first JSP page, there is file location and submit button. After user select a file to upload and click submit button, a message, like "sending file to XXXX", will be shown on the screen. Once uploading and validation are done on the server-side, a successful/error msg will be shown to user.
Here I have a question for the "sending..." msg and the successful/error msg. They should be put in one jsp page or in two separate page? how to implement them?
Thanks for any help!
Tranquil

For the sending message... Well, the thing is, when you click submit, it's sending the file to the server and the server is processing it, and this is all done before the "complete" page is sent to the server. So one would need to use some Javascript on the page before the actual submit happens to show some message. This is done on Ebay when you put something for sale, you can upload an image, and there is a little popup message telling you that it's uploading, and it is removed when the process is done. Now, I'm not sure the exact details of how this works, but my educated guess is this:
1) The onsubmit function of the form checks that the file upload fields have a value (no need to popup a message if no file upload, since that's what usually takes the time, although it could just be assumed there is a file). If a file is to be uploaded, or just want to show the message anyway, a new popup window is opened with the window.open method and the "sending" message is shown (either written via Javascript or just load a small web page to the window).
2) The popup window, since you can't transfer the window object from the form page to the next page, has to check window.opener for some value that the success/error page would have to set. The success/error page could use it's body onload function to set a variable in it's own window object to denote that the page is loaded. The popup window can use a looping check using setTimeout or setInterval in Javascript to check for window.opener.isLoadedVariable to be present, and if so, close itself.
I've never done that, but I see no reason why it wouldn't work.

How to identify version of jsp in web app

How to identify which version of JSP the web application is developed.
Is it based on Servlet Version
Where can i get information for Servlet version XX to ---> JSP Version XX

Hi ElaKeen62,
Just follow the instructions posted by Andrej.
Alternative you can also make a right click on My Computer and choose Properties. In new window you can also see the OS version. ;)

Jsp-file="/WEB-INF/index.jsp" cannot load

          Hi,
          I am defining a servlet in the web.xml file using the following syntax.
          <servlet>
          <servlet-name>TestServlet</servlet-name>
          <jsp-file>/WEB-INF/index.jsp</jsp-file>
          </servlet>
          Then when I tried to access this servlet, I get a 404 not found error. The weblogic.log
          file complains with the following message:
          java.io.FileNotFoundException: no resource '/WEB-INF/index.jsp' in servlet context
          root '/home/dev/web/apps/MyApp'
          at weblogic.servlet.jsp.JspStub.compilePage(JspStub.java:293)
          at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:227)
          at weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:200)
          at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:115)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:922)
          at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:886)
          at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:269)
          at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:380)
          at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:268)
          at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
          My jsp file in located in /home/dev/web/apps/MyApp/WEB-INF/index.jsp, I know weblogic
          doesn't support jsp under WEB-INF, however, according to Sun's Servlet specification,
          anything under web-inf should be accessible to getResource and getResourceAsStream
          method, and it looks like that's what weblogic implementation is using (from the
          error message). So I am not sure whether this is weblogic issue or I am doing
          something wrong. By the way, the above config in web.xml is supported in Tomcat.


          What version of WebLogic will incorporate Servlet spec 2.4 and allow jsp under
          web-inf?
          Chris
          "Narayan Anand" <[email protected]> wrote:
          >Regarding S-12864 - It will not work as stated in the solution in any
          >of
          >the available releases of WLS.
          >Please ignore that. I already informed the concerned person to correct
          >the
          >solution.
          >
          >The story behind this is:
          >Our engineering team is already aware of the fact that the request
          >dispatcher calls (include/forward) for a jsp under the web-inf directory
          >works in other app server - Tomcat.
          >Our engineering team had a discussion with the servlet/jsp spec experts
          >group for clarifying the spec and the tomcat implementation.
          >So the servlet expert group has decided to explicitly state in the spec
          >that
          >RD.forward() and RD.include() should be allowed access to resources in
          >/WEB-INF and it will be included in servlet spec 2.4. For now, WLS works
          >as
          >per the current specification.
          >
          >So far the story is - WLS will implement this in our next major release
          >which will be compliance with servlet spec 2.4.
          >In all the currently available WLS releases, accessed to a jsp under
          >the
          >WEB-INF directory is prohibited.
          >
          >--
          >Best Regards,
          >Narayan Anand
          >Developer Relations Engineer
          >BEA Systems, Inc.
          >
          >
          >
          >
          >
          >
          >"Ming Fan" <[email protected]> wrote in message
          >news:[email protected]...
          >>
          >> Thanks for the explanation. So this means weblogic treats such mapped
          >servlet request
          >> as a direct request to the jsp under WEB-INF, instead of forwarding
          >it to
          >some
          >> JspCompiler servlet and let that compiler servlet use some resource
          >loader
          >to
          >> load the jsp and then compile. I believe that latter implementation
          >approach also
          >> conforms the Servlet spec (it's a different way of treating the request,
          >I
          >guess).
          >>
          >> Now here's another question. According to Web logic Customer Support
          >Solution
          >> ID S-12864 (WLS 6.x - Cannot access JSP under the WEB-INF directory),
          >the
          >servlet
          >> should be able to get a request dispatcher, and then forward the request
          >to the
          >> jsp under WEB-INF. I am still using WLS 5.1, so does the above solution
          >apply
          >> to 5.1 also? It doesn't seem to work with 5.1. So is this a 5.1 problem
          >and I
          >> should upgrade to 6.1?
          >>
          >> Thanks.
          >>
          >> "Narayan Anand" <[email protected]> wrote:
          >> >Hi Ming,
          >> >
          >> >It is legal to put files under WEB-INF directory. But as mentioned
          >in
          >> >the
          >> >spec, it will be available only to servlet code and not directly to
          >client
          >> >request.
          >> >Read the last statement of the same paragraph in section9.5.
          >> >"Since requests are matched to resource mappings case-sensitively,
          >client
          >> >requests for '/WEB-INF/foo', '/WEb-iNf/foo', for example, should not
          >> >result
          >> >in contents of the web application located under /WEB-INF being returned,
          >> >nor any form of directory listing thereof.".
          >> >
          >> >So in your case, when you access the servlet which gets mapped to
          >> >/WEB-INF/your-jspfile, under no condition it should result in display
          >> >of jsp
          >> >contents.
          >> >It is working as per the specification.
          >> >
          >> >I hope this helps.
          >> >
          >> >Regards,
          >> >Narayan Anand
          >> >Developer Relations Engineer
          >> >BEA WebLogic Support
          >> >
          >> >
          >> >
          >> >"Ming Fan" <[email protected]> wrote in message
          >> >news:[email protected]...
          >> >>
          >> >> Actaully there are other ways to solve my problem. But what I am
          >> >interested to
          >> >> know is under the Servlet specification 2.3, is it legal to put
          >jsp
          >> >under
          >> >WEB-INF,
          >> >> define it in <jsp-file> xml tag, and should the JSP compiler be
          >able
          >> >to
          >> >see this
          >> >> as a resource. Apparently, Tomcat allows this behavior, so does
          >this
          >> >mean
          >> >Tomcat
          >> >> conforms better to the Servlet spec, or Tomcat is wrong but Weblogic
          >> >conforms
          >> >> better? Can anyone let me know what's the correct interpretation
          >of
          >> >section 9.5
          >> >> in servlet spec 2.3?
          >> >>
          >> >>
          >> >> "Jerrie Pineda" <[email protected]> wrote:
          >> >> >Try moving it to a different dir. You normally don't place jsp
          >file
          >> >> >in the
          >> >> >WEB-INF dir.
          >> >> >
          >> >> >
          >> >> >"Ming Fan" <[email protected]> wrote in message
          >> >> >news:[email protected]...
          >> >> >>
          >> >> >> Hi,
          >> >> >>
          >> >> >> I am defining a servlet in the web.xml file using the following
          >> >syntax.
          >> >> >> <servlet>
          >> >> >> <servlet-name>TestServlet</servlet-name>
          >> >> >> <jsp-file>/WEB-INF/index.jsp</jsp-file>
          >> >> >> </servlet>
          >> >> >>
          >> >> >> Then when I tried to access this servlet, I get a 404 not found
          >> >error.
          >> >> >The
          >> >> >weblogic.log
          >> >> >> file complains with the following message:
          >> >> >> java.io.FileNotFoundException: no resource '/WEB-INF/index.jsp'
          >> >in
          >> >> >servlet
          >> >> >context
          >> >> >> root '/home/dev/web/apps/MyApp'
          >> >> >> at
          >weblogic.servlet.jsp.JspStub.compilePage(JspStub.java:293)
          >> >> >> at
          >> >weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:227)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.java:
          >2
          >> >0
          >> >> >0)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.ja
          >v
          >> >a
          >> >> >:115)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextI
          >m
          >> >p
          >> >> >l.java:922)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextI
          >m
          >> >p
          >> >> >l.java:886)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletConte
          >x
          >> >t
          >> >> >Manager.java:269)
          >> >> >> at
          >> >>
          >>
          >>>weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:380
          >)
          >> >> >> at
          >> >> >weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:268)
          >> >> >> at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)
          >> >> >>
          >> >> >> My jsp file in located in
          >/home/dev/web/apps/MyApp/WEB-INF/index.jsp,
          >> >> >I
          >> >> >know weblogic
          >> >> >> doesn't support jsp under WEB-INF, however, according to Sun's
          >Servlet
          >> >> >specification,
          >> >> >> anything under web-inf should be accessible to getResource and
          >> >> >getResourceAsStream
          >> >> >> method, and it looks like that's what weblogic implementation
          >is
          >> >using
          >> >> >(from the
          >> >> >> error message). So I am not sure whether this is weblogic issue
          >> >or
          >> >> >I am
          >> >> >doing
          >> >> >> something wrong. By the way, the above config in web.xml is
          >supported
          >> >> >in
          >> >> >Tomcat.
          >> >> >
          >> >> >
          >> >>
          >> >
          >> >
          >>
          >
          >

File upload and download using jsp/servlets

How to upload any file to the server using jsp/servlets. . Help me out

You can also try the Jenkov HTTP Multipart File Upload. It's a servlet filter that is easy to add to your web-project. After adding it, you can access both request parameters and the uploaded files easily. It's more transparent than Apache Commons File Upload. There is sufficient documentation to get you started, and there is a forum if you have any questions.
Jenkov HTTP Multipart File Upload is available under the Apache license, meaning its free to use.

How to map jsp in web.xml

Hi,
CAn anybody tell me that how to map .jsp in web.xml
thanx
vjoy

Same as servlets, except that you specify jsp-file in place of servlet-class - see below
<servlet>
     <servlet-name>MyJspServlet</servlet-name>
     <jsp-file>/jspServlet.jsp</jsp-file>
</servlet>
<servlet-mapping>
     <servlet-name>MyJspServlet</servlet-name>
     <url-pattern>/myJspServlet</url-pattern>
</servlet-mapping>cheers,
ram.

Jsp+servlet web layer architecture

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