Sendredirect() from a servlet to a jsp page

Hi all,
From word document, I have some links like this: http://localhost:8080/Test/GetFileServlet?Name=Peter&Age=12
when I click on the link, the GetFileServlet will check for user authentication.
If i haven't logged in yet, servlet will kick me to Login.jsp (jsf) to login. I use a servlet filter to filter users.
Once logged in, the page backing bean of login.jsp (Login.java) will send me to output.jsp which is only accessable to authenitcated users.
That works great......
Here is the problem when I click on the same link again.. With that I'm expecting the Servlet to kick me straight to output.jsp of JSF
However, it keeps kicking me back to the login.jsp instead of output.jsp...
Here is my sendredirect code in servlet
resp.sendRedirect("http://10.80.54.240:8080/Test/faces/Local/output.jsp?Name=Peter&Age=12);

iT'S OK..i fixed it using dispatcher

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Hi guys,
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Ive tried so many bloody things!.....
Simply.
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hmmm, I dont really like using JSP programming, u should be using JAVA..
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see https://addons.mozilla.org/en-US/thunderbird/addon/send-later-3/

Can a servlet make a jsp page display?

A total newbie question. If I do this in a servlet:
RequestDispatcher rd = request.getRequestDispatcher( "/index.jsp" );
rd.forward( request, response );
- does index.jsp in the context path actually display?
If yes, what's wrong if it doesn't display?

Yes, you can pass control from your servlet to the JSP page that way. If it isn't displaying, then you should show us the error message you are getting so that we can help you more effectively.

How to display outsream from a servlet in a JSP

I wrote a jsp file to call a Servlet, then want to display the result from the servlet in another jsp file. Anyone can give me possible solution or an example to illustrate it.
Many thanks in advance.
the file that call servlet in a jsp is as follow
<form method="POST" action="myservlet">
<table>
<tr>
<th align="center" colspan="2">
Enter The query words
</th>
</tr>
<tr>
<th align="right">query words:</th>
<td align="left">
<input type="text" name="querywords" size="60">
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</tr>
<tr>
<td align="right">
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............

I would suggest that you use the Servlet to retrieve the data you are after and store it in the session. Then forward the user onto the JSP page where it can retrieve the object from the session and present it to the user in a formatted view.

Challenge forwarding from a servlet to a JSP

Redirecting information from a servlet to a JSP
Hello Everyone,
     I am processing the contents of a html form using a servlet. After processing the
information received and storing it into a javabean I am trying to pass control onto a jsp for
display. At this stage the jsp does not display as desired due to a URL challenge. The URL
which references my jsp is:
http://localhot/ferngully/prefset.jspThis url has been designated to the jsp page 'prefset.jsp' by the application specific web.xml
file (...I am using Tomcat 5!), the relevant contents of which follow:
<servlet>
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</servlet>
<servlet-mapping>
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</servlet-mapping>If I access the page with the afore mentioned URL it displays correctly. However the URL which
is returned to the browser after the servlet has forwarded control to the JSP is:
http://localhost/ferngully/ferngully/PreferencesThe following form markup is used to access the servlet:
<form name="form1" method="post" action="ferngully/Preferences"> I know that I have mapped the servlet correctly because the servlet performs it's programatic tasks happily :)
I am using code within the servlet to forward control to the JSP, and I believe that this is the crux of my challenge.
The code for the servlet is listed below.
package userpreferences;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class PreferencesServlet extends HttpServlet
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}I believe that the above highlighted code section is responsible for my challenge. I have tried changing the String url to "/ferngully/prefset.jsp",
however there was no improvement in functionality.
Can somebody please explain to me how I can go about directing the control of this process from the servlet to the jsp correctly? Particularly
how I can go about making the url returned to the client correct for accessing the jsp page? Do I need to delete the mapping entry for the
jsp page in web.xml? I am new to servlets & jsp so any help will be much appreciated.
Thanks
Kind Regards
Davo

3. >The following form markup is used to access the servlet:
<form name="form1" method="post" action="ferngully/Preferences">Question 1:
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     General funda about urls:
     When you have an index.html loaded through http://localhost/index.html, then a link in that html whose url is,
     1. say, preferences.html (no forward slashes preffixed or suffixed) would load the html from the same folder.
     2. say, /ferngully/prefences.html, would attempt to load a html from the ferngully folder that is a sub-directory
of your web-application
     3. say, /ferngully/prefences.jsp, would attempt to load a html from the ferngully folder that is a sub-directory
of your web-application
     When you have a servlet whose url-pattern is set to intercept requests, it would intercept requests that have that
pattern it is defined to intercept in web.xml (for example all the above requests in 1,2 and 3 would be intercepted
by a servlet whose pattern is ferngully/*)
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/ferngully/preferences. (for which a resource should be defined in web.xml - either a servlet or a jsp)
However the URL which is returned to the browser after the servlet has forwarded control to the JSP is:
http://localhost/ferngully/ferngully/PreferencesTell us the url of the original html
I know that I have mapped the servlet correctly because the servlet performs it's programatic tasks happily :)Tell us the url-appetrn of the servlet that intercepted your request
Particularly
how I can go about making the url returned to the client correct for accessing the jsp page?The url in the browser is always the request url, you cannot change it to the url of the jsp even which rendered the page
through a fwd from the servlet.
Do I need to delete the mapping entry for the
jsp page in web.xml?Not necessary. You can access the jsp directly from the servlet while forwarding by
1. specifying the exact path to the jsp. For example if the jsp is under a folder called jsps, your request dispatcher
url ought to be /jsps/prefset.jsp
2. specifying the jsp's url-pattern as specified in web.xml
Questions Contd
2. Why does the url pattern have to have a .jsp suffixed.
From your code
<url-pattern>/ferngully/prefset.jsp</url-pattern>It could equally well have been
<url-pattern>/ferngully/prefset</url-pattern>And then your servlet would have to forward it to ("/ferngully/prefset")
2. Your jsp-file mapping is in this form
<jsp-file>/prefset.jsp</jsp-file>This assumes that the jsp is in the top-level folder of your web-application and not under
any sub-directories. Correct ?
cheers,
ram.

Problem for getting the real path using one servlet and one jsp page

I have one tomcat machine and several virtual domains. Eahc virtual domain has one realpath in the disc.
I am using one servlet and one jsp page for using this servlet.
my purpose is to load, using the servlet , the real path for the domains (eahc domain has its path).
for this i make this:
the servlet code is this:
package utils.ticker;
import java.io.*;
import java.io.File;
import java.io.IOException;
import java.net.*;
import java.util.*;
import java.text.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class Edicion extends HttpServlet{
public Edicion() {
public String cc(){
ServletContext myContext= getServletContext();
String abspath = myContext.getRealPath("/");
//here i want to return the real path
return abspath;
public static void main(String args[]){
and the jsp page is:
<%@ page import="utils.ticker.*" %>
<jsp:useBean id="tick" class="utils.ticker.Edicion" scope="session"/>
<html><head><body>
<%
tick.cc();
%>
</body></head></html>
But this produces one error, NullPointerException and dont shows me the real path.
Can anyone help me?
thanks

i have put this into one sevlet:
package utils.ticker;
import javax.servlet.ServletContext;
public class Edicion{
private ServletContext myContext;
public Edicion(ServletContext myContext) {
this.myContext = myContext;
public String getCC(){
return myContext.getRealPath("/");
and in the jsp page this:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*"%>
<%@ page import="utils.ticker.*" %>
<jsp:useBean id="tick" class="utils.ticker.Edicion" scope="session"/>
<html><head><body>
<%=tick.getCC()%>
</body></head></html>
but appear this error in the tomcat.
Can you, please, help me. i am trying to solve this during one week and i am desesperate.
Thanks.
ERROR:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: class utils.ticker.Edicion : java.lang.InstantiationException: utils.ticker.Edicion
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:248)
     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:260)
     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.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:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$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:432)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
     at java.lang.Thread.run(Thread.java:536)
root cause
javax.servlet.ServletException: class utils.ticker.Edicion : java.lang.InstantiationException: utils.ticker.Edicion
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533)
     at org.apache.jsp.pruebas_jsp._jspService(pruebas_jsp.java:72)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
     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:260)
     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.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:2415)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$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:432)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
     at java.lang.Thread.run(Thread.java:536)
Apache Tomcat/4.1.18

Passing input parameters from an applet to a JSP page

Hello all,
Yes, its one of these questions which I have tried to find a solution from the already large number of postings but with no luck. I'm still a novice to Java/JSP so bear with me.
Consider this scenario.
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Extracting a value from the j_security_check servlet into a JSP page

Hi Folks...
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Hi Folks..
I managed to get a reply from another forum and the suggested solution works. I am going to share it with everyone here.
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Retrieve values from a table of a JSP page in Servlet.

Hello all,
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Hi,
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Session is lost when going from a servlet to a jsp

Any help would be greatly appreciated.
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<jsp:useBean name="helper" scope="session" class=".."/>
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          ·class="package.class"
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          - Navaneeth

Display multiple Images from a DB on a JSP Page!

Hi all, please give me your solution, thanks. I have many images, stored in Oracle database (BLOB), How to display all of them (images) on a JSP page? I have a working solution that only shows one image based on the specific image-name passed. But if no image found in the Database with that image-name then I want to show all the images at once on a JSP page. Can someone help please. Follwing are the code snippets:
Here is the JSP page that calls the servlet to show the images:
<%@ page contentType="text/html;charset=windows-1252"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
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</head>
<body valign=center>
      <table>
        <tr>
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            </td>
        </tr>
      </table>
</body>
</html>
Here is the code that resides in the service method of GetImage servlet:
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    OutputStream stream = response.getOutputStream();
    Blob imgBlob = null;
    ResultSet rs = null;
    byte[] imbBytesAry = null;
    try
        ImageTest imgtest = new ImageTest();
        rs = imgtest.get("img1.tif");
        if(rs != null)
            while(rs.next())
                imgBlob = rs.getBlob(1);
                int len = new Integer( new Long( imgBlob.length()).toString() ).intValue();
                imbBytesAry = imgBlob.getBytes(1,len);
                if (imbBytesAry.length == 0 || imbBytesAry == null)
                    noImageFound(request, response);
                else
                    stream.write(imbBytesAry);
        else
            noImageFound(request, response);
    catch (Exception e)
        noImageFound(request, response);
Here is the code that resides in the get method of ImageTest class:
public ResultSet get(String fileName) throws DatabaseConnectionException, SQLException, Exception
Connection connection=null;
ResultSet rs = null;
ResultSet rs1 = null;
Blob imgBlob = null;
try
    connection = new ConnectionProvider().getCConnection() ;
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    String sql = "SELECT IMG FROM IMAGE_TABLE WHERE IMAGE_NAME = ? ";
    PreparedStatement pstmt = connection.prepareStatement(sql);
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    if(flag)
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        rs1 = stmt.executeQuery(sql);
        boolean flag_all = rs1.next();
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            rs1.beforeFirst();
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            rs1 = null;
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}As you see in the JSP page I am calling GetImage servlet, whose service method does all the processing i.e. calls ImageTest get method that queries the database and returns the result. Eventually what I would like is to pass the filename along with other parameters from JSP page and the servlet returns the images based on that. Currently I have just hard coded a value for testing puposes. Any help is appreciated.
Thanks

Hi all, please give me your solution, thanks. I have many images, stored in Oracle database (BLOB), How to display all of them (images) on a JSP page? I have a working solution that only shows one image based on the specific image-name passed. But if no image found in the Database with that image-name then I want to show all the images at once on a JSP page. Can someone help please.
this is the code
<form name="a" action="" method="post">
<%
rs1 = st1.executeQuery(select1);
rs1.next();
while(rs1.next())
%>
<table>
<tr><td>
<%
Blob objBlob[] = new Blob[rs1.getMetaData().getColumnCount()];
     for (int i = 0; i <= rs1.getMetaData().getColumnCount(); i++)
           objBlob[i] = ((OracleResultSet)rs1).getBLOB(1);
          InputStream is = objBlob.getBinaryStream();
byte[] bytearray = new byte[4096];
int size=0;
response.reset();
response.setContentType("image/jpeg");
response.addHeader("Content-Disposition","filename=getimage.jpeg");
while((size=is.read(bytearray))!= -1 )
response.getOutputStream().write(bytearray,0,size);
response.flushBuffer();
is.close();
out.println("hhhhhhh");
%>
</table>
<%
rs1.close();
//con.close();
%>
</form>

Retrieving lists from other layer into a JSP page - Design Question

Hi all,
What should be a good design technique in order to allow a JSP page to present some list obtained from other layer of my application. I intend to leave only presentation logic in the JSP layer, while all data access will be in other layer.
For example, I have a JSP page that will show the results of a SQL query originated from an entry form in other JSP page. Let's name them 'search.jsp' and 'result.jsp'
I want that all JDBC access be done in some other layer.
Question 1:
What would be better for this task? A servlet or a bean? (A bean, I suppose?)
Then this bean (?) would have to find some way to pass all the result set into this 'result.jsp'. I think it would be very poor design if I used some Data Object, because it would have to store all rows and pass them at once.
I don't want, either, that the presentation (JSP) layer access directly the data access layer (JDBC, files...). This way, I don't want any JSP page accessing the Resultset object directly.
Question 2:
What do you think could be a good design technique?
I thought of some intermediate layer that provided data objects and data access interfaces. I mean, as my data will come from different sources, like some database (JDBC), some Electronic Document Manager, I thought of having a common access interface, that would provide methods for accessing the resultsets. This could be even a java.util.Enumeration that has a hasMoreElements() method that could be implemented as the next() method from JDBC result sets and the nextElement() method that would actually bring the next row of data.
This way the JSP layer would see only hasMoreElements() and nextElement() methods from the middle layer. On the other hand, the data layer would provide as many different implementations to this access interface (Enumeration?) as there were data sources (JDBC, Files, ...)
Question 3:
What do you think of this design?
Question 4:
Is there any flaw in my approach? Which?
Question 5:
Could you suggest other designs?
I really thank you all, for any kind of answer. I actually use this design for development, however I've never seriously discussed it with someone... this is going to be of great value for me.
Regards,
Filipe Fedalto

Well I saw you question and I'll tell you what I do.
I have JSP's which post form data to servlets.
The servlet then calls a factory to produce a ResultContainer (analagous to your lists) which is generated
via JDBC, and/or request parameters etc...
this provides a single point of reference and a "group" of containers (functions really) that can be produced and reused (same container different amount of data)
I also have other static classes which can manipulate the data in the containers
(such as add additional info to the items in the containers) before I forward the container (request attribute)
to the JSP page
Additionally I use Type safe constants for all my HTML form tag names (easier to change and ensure the same name is used everywhere when reading parameters) and again for item statuses
and any other info I need to send along with the page (using Javascript to update the
status to another type safe constant).
I've found that using factories for ResultContainers is very worthwhile and allows you to implement additional servlets extremely quickly (mostly reusing containers that exist) and since the
container is the same for all my JSPs (this may not be the case with you) I can implement JSP's
very quickly as well (just change the view)
btw I refrain from calling my ResultContainer a bean because it is not serializable
I don't know if this will help but at least it gives me a forum to test my ideas
Thanks

Trouble forwarding request from a servlet to a JSP in OAS 4.0.8.1 on NT

The OJSP release notes state that:
"Servlets and JSP cannot coexist as the same application" and "Requests cannot be passed between two separate applications."
Does this mean that my attempts to use the
the servlet RequestDispatcher to forward a request to a JSP are futile? If so, is this a problem that will be fixed in the future? I would like to use this feature!
This is the code (based on a sample from Sun's JSWDK 1.0.1) that doesn't work:
servletToJsp.java
import javax.servlet.*;
import javax.servlet.http.*;
public class servletToJsp extends HttpServlet {
public void doGet (HttpServletRequest request,
HttpServletResponse response) {
try {
getServletConfig().getServletContext().getRequestDispatcher("/jsp/jsptoserv/hello.jsp").forward(request, response);
} catch (Exception ex) {
ex.printStackTrace ();
I am able to use the <jsp:forward page="/servlets/servletToJsp" /> directive to go from a JSP page to a servlet (across two OAS Applications) and I also can forward a request via the dispatcher from one servlet to another in the same OAS application.
Any help in this area would be appreciated. Thanks.

I'm using OAS 4.0.8.1
You mean servlet to JSP does not work and JSP to servlet works for you????Yes - but I've only tried very simply examples.
That's different from my understanding. If you are using OAS 4081, both cases should not work.
The problem you mentioned will be fixed in future release of OAS.That's good to know - thanks!
null

How am i supposed to prevent sm from pasting code in my JSP page?

Hello,
as i was testing my JSP page i noticed that when sm places code in an input box , it seems that the page is affected by that.
Well i have a very simple form like:
<form style="text-align:left" method="POST" name="edit" action="Edit" >
<input type="text" name="year" size="5" maxlength ="50" value="<%= convertdate.ReturnYear((resultset.getString(19)) %>">
<input type="submit" name="Submit" value="Store Data" >
</form>i noticed that when i was placing code in the button year of the form like:
out.println("<HTML><HEAD><TITLE> " + "Error in PAGE BLAH BLAH BLAH" + " </TITLE></HEAD><BODY>");my website was affected by that and some pages looked different and couldn't display data from the database, although the data existed in the db.
What am i supposed to do? How am i supposed to prevent a user from inserting code in inputs of a form?
Also, sometimes when i was pasting code, some SQL exceptions appeared saying : Data too long for field etc.
The weird was that the data was in the limit. I'm very worried about this problem because the sql exceptions show the names of my tables and i think
that this is dangerous for malicious attacks in the website.
Thanks, in advance!
Edited by: g_p_java on Sep 5, 2009 5:09 PM
Edited by: g_p_java on Sep 5, 2009 5:14 PM
Edited by: g_p_java on Sep 5, 2009 5:15 PM

smogura.eu wrote:
All notices are important & how to say... you can place Java code in JSP, but in commercial job you will need to find new job.
Well i'm not actually working somewhere, i'm student and i have to make this project.
It's the first time I use JSP, servlets etc, so that's why i find a difficulty in using them.
Why your pages are messed? If you put HTML code in db, rendered page is like
..="50" value="<HTML><HEAD...{code}
this will prevent browser to render page properly. Well i was actually pasting some data in order to check if the data is too long for the field and afterwards the page changed and many fields disappeared...
There are two ways to prevent inserting code, in your JSP, and you need use it, as no separating view logic, data acquisition from page will not prevent this error
1. You need disallow user entering ", <, ' etc...., best way by validating input on server side, by this will prevent user from entering all texts, or
2. You need replace all HTML special char with their HTML codes when rendering, the simplest way
convertdate.ReturnYear((resultset.getString(19)).replace("\"", "&#34'").replace(...).replace(...)
{code}
You must use this in back logic.May you please elaborate on that, you mention that i shall replace the year with "&#34'",
What is that "&#34'"?
and why do you use 3 "replaces"?
About prepared statements.
Preparation will not only prevent you from SQL injections, but can speed up application, if your driver uses statement caching.
Why after creating prepared statement, you then create normal statement, in your example code?I hadn't noticed that, thanks.I 'll change them. But Statement is less secure than PrepareStatement?
Thanks, in advance!

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