Finding tomcat server in a system

Hi all,
I should write a code in java which searches Tomcat in a any system.
So,that on running of that file i should find the tomcat or any server and deploy my war file
into that particular server.

I wouldn't do that. There is no other reliable way than crawling through the whole filesystem on all disks. What if the client has one million files? The search would definitely take a lot of time then. What if the client has multiple instances of Tomcat? How do you know which one to pick then?
Rather ask the end-user to select/browse/enter the root directory of Tomcat installation.

Similar Messages

Can not receive Mac mail -error Outlook cannot find the server. Verify the server information is entered correctly in the Account Settings, and that your DNS settings in the Network pane of System Preferences are correct. Account name: "MacMail"

Can not receive Mac mail -error Outlook cannot find the server. Verify the server information is entered correctly in the Account Settings, and that your DNS settings in the Network pane of System Preferences are correct. Account name: "MacMail"
What are the correct mail account settings and more importantly the correct DNS settings
Thank you for any help you may be able to provide
Cheers
Chris (iMac i7)

Do not delete the old account yet. sign up for an iCloud account if you haven't.
I understand .mac mail will still come through. Do not delete the old account yet.
You cannot use .mac or MobileMe as type of Account, you have to choose IMAP when setting up, otherwise Mail is hard coded to change imap.mail.me.com to mail.me.com & smtp.mail.me.com to smtp.me.com, no matter what you try to enter.
iCloud Mail setup, do not choose .mac or MobileMe as type, but choose IMAP...
On second step where it asks "Description", it has to be a unique name, but you can still use your email address.
IMAP (Incoming Mail Server) information:
          •          Server name: imap.mail.me.com
          •          SSL Required: Yes
          •          Port: 993
          •          Username: [email protected] (use your @me.com address from your iCloud account)
          •          Password: Your iCloud password
SMTP (outgoing mail server) information:
          •          Server name: smtp.mail.me.com
          •          SSL Required: Yes
          •          Port: 587
          •          SMTP Authentication Required: Yes
          •          Username: [email protected] (use your @me.com address from your iCloud account)
          •          Password: Your iCloud password
Also, you must upgrade your password to meet the new criteria: 8 characters, including upper and lower case and numbers. If you have an older password that does not meet these criteria, when you try to setup mail on your mac, using all of the IMAP criteria listed above, it will still give a server error message. Go to   http://appleid.apple.com         then follow directions to change your password, then go back to setting up your mail using the IMAP instructions above.
Thanks to dpepper...
https://discussions.apple.com/thread/3867171?tstart=0

My tomcat server is not able to find out the servlet

Hi
I m working on Tomcat 4.2and i have java installation jdk 1.4.
But my tomcat server is not able to find out the servlet.
i have also made entry in web.xml file.I have compiled dervlet file.But yet not able to run it in tomcat.Plz help me

Go to the Tomcat site and read the "First Web App" docs. I'm sure you didn't deploy your servlet properly.
%

Problem with Java Studio Creator and Tomcat Server

Hi Gays ,
I have problem:
here is the error from tomcat 5
com.sun.rave.web.ui.appbase.ApplicationException: org.apache.jasper.JasperException: java.lang.RuntimeException: java.sql.SQLException: statement handle not executed: getMetaData
com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.destroy(ViewHandlerImpl.java: 601)
com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.ja va:316)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87 )
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:221)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:194)
if i develop application on my pc ( java studio creator with sun apps bundlled) is working perfectly,
but i migrated application to Tomcat Server ( Database the same - Oracle 10 g)
i can't show value ( as text) from datasoruce ( is in SessionBean1)
(Category-.>Subcat->Items->details( url from items table[items.jsp])
this is a working url "/faces/testpage.jsp?auk_id=31 "
( working with sun apps server , but not on Tomcat 5)
below prerender method in details.java and fragment of details.jsp
public void prerender() {
try {
String idauk = (getExternalContext().getRequestParameterMap().get("auk_id").toString());
System.out.println("wartosc auk_id " + idauk);
if (idauk != null) {
getSessionBean1().getDetailsRowSet().setObject(1,idauk);
getSessionBean1().getDetailsDataProvider().refresh();
details.jsp
xml version="1.0" encoding="UTF-8"?>
<jsp:root version="1.2" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:ui="http://www.sun.com/web/ui">
<jsp:directive.page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"/>
<f:view>
<ui:page binding="#{testpage.page1}" id="page1">
<ui:html binding="#{testpage.html1}" id="html1">
<ui:head binding="#{testpage.head1}" id="head1">
<ui:link binding="#{testpage.link1}" id="link1" url="/resources/stylesheet.css"/>
</ui:head>
<ui:body binding="#{testpage.body1}" id="body1" style="-rave-layout: grid">
<ui:form binding="#{testpage.form1}" id="form1">
<ui:staticText binding="#{testpage.staticText1}" id="staticText1" style="position: absolute; left: 120px; top: 96px" text="#{SessionBean1.testDataProvider.value['Name']}"/>
</ui:form>
</ui:body>
</ui:html>
</ui:page>
</f:view>
</jsp:root>
Help People ! Any Ideas I'm stuck, why is working with Sun Servet but not with Tomcat and only just thing ?
Thanks in advance for helping me to resolve the night problem :)

Hi I found solution, i puted on the page a table -component (with brand new automaticly created dataprovider) , then i set properties visible= false for table, and now I can bind statictext with database field and deploy on tomcat server .
But i think it is not a elegant solution in page source i habe noused-code.
Have Any another Ideas. HELP PEOPLE !!!!
Mariuszek: I use Creator.because right now I can see result of my job and i can qickly change ideas ,
I tried with JDeveleper but i did'nt find this functionality (wich version do you prefered ?) , unfortunately i have to deploy my application on Tomcat. This is my study project, and i make this to become a Master of Techinal Univeristy ;), Deadline time is 30 th September :(
greetings

Unable to start tomcat server

hi,
i want to develop simple application using servlets.i ve installed apache tomcat4.1 version.i ve compiled my servlet program successfully.but when i am trying to start tomcat server,it is showing some error.i ve set the callspath too.
the error is:
The JAVA_HOME environment variable is not defined correctly
This environment variable is needed to run this program
Using CATALINA_BASE: ..
Using CATALINA_HOME: ..
Using CATALINA_TMPDIR: ..\temp
Using JAVA_HOME: c:\jdk1.5.0_05;
The system cannot find the file -Dsun.io.useCanonCaches=false.
please resolve my problem..
thanks in advance..

Using JAVA_HOME: c:\jdk1.5.0_05;There shouldn't be a semi-colon in the JAVA_HOME

Problem connecting oracle database to jsp pages using Apache Tomcat server 8.0

Well...I tried too many things..googled so many times..but still could not find solution to my problem.
I use windows 8 Enterprise Edition(if this has to do something with the problem)
Oracle 11.2.0
Apache Tomcat server 8.0
JDK 1.7
My oracle is installed in the D: drive and tomcat in c:. i copied the ojdbc6.jar file from oracle to lib directory of tomcat server.
Then i set CLASSPATH in environment variables as "C:\Program Files\Apache Software Foundation\Tomcat 8.0\lib\ojdbc6.jar" in system variables
My path variable is set as "C:\Program Files\Java\jdk1.7.0_02\bin".
My program is as follows in notepad:
<%@ page import="java.sql.*" %>
<html>
<body>
<%
Connection conn;
Statement st;
ResultSet rs;
try{
new oracle.jdbc.driver.OracleDriver();
String dbURL="jdbc:odbc:oracle:thin:@localhost:1521:XE";
String userId="system";
String pwd="moon";
conn=DriverManager.getConnection(dbURL,userId,pwd);
st=conn.createStatement();
rs= st.executeQuery("SELECT * FROM login");
while(rs.next())
System.out.println(rs.getString(1)+""+rs.getString(2));
catch(Exception e){}
%>
</body>
</html>
I get too many errors then
eroors
org.apache.jasper.JasperException: An exception occurred processing JSP page /page2.jsp at line 14
11: String userId="system";
12: String pwd="moon";
13:
14: conn=DriverManager.getConnection(dbURL,userId,pwd);
15: st=conn.createStatement();
16:
17: rs= st.executeQuery("SELECT * FROM login");
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
javax.servlet.ServletException: java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:905)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:834)
     org.apache.jsp.page2_jsp._jspService(page2_jsp.java:102)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:403)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:347)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Nothing solved this problem.

>> Nothing solved this problem.
Can't fix a problem 'till an actual problem is identified.
>> ODBC Driver Manager ... Data source name not found
That appears to be ODBC drivers looking for a DSN (Data Set Name). If it wants a DSN, the DSN has to be specified in the code, and the DSN has to be configured in the windows host ODBC applet. So that is at least two squirrels to get in the right tree before moving forward. A ...host:...[port:]SID|service name are some of the bits needed in a jdbc connect string, and that is in no way related to DSNs. A Whole Different Animal. If it wants a DSN that might be what needs to go in the URL bit.
And ODBC setups can be confusing, especially if an x64 OS is in the mix- if that is the case there are two different ODBC configuration applets, one for x64 the other for x86, and if one gets as far as talking to an actual database it might toss an architecture error. Only way to fix that "problem" is *delete* the ODBC DSN and then run the correct (maybe the x86) ODBC config utility, and set up the DSN. Again.

Tomcat Server window closes automatically when I start it

Hi,
I am using Apache Tomcat 4.1 to work a small Web application. Each time when I start the Tomcat server the window comes up and closes automatically. Is something wrong with my configuration ?
Do I have to make any changes to server.xml ?
Pls help..
Thanks,
bobby.

I think Tomcat 4.1 works fine with JDK1.5.0. Untill last week I was able to work on my application.
This problem started after I did a reboot. Ever since then I am having this problem
I tried to set the JAVA_HOME from the CATALINA_HOME dir and this is what I got,
C:\PROGRA~1\APACHE~1\Tomcat 4.1\bin>set JAVA_HOME = C:\PROGRA~1\JAVA\jdk1.5.0_0
C:\PROGRA~1\APACHE~1\Tomcat 4.1\bin>catalina run
The JAVA_HOME environment variable is not defined correctly
This environment variable is needed to run this program
NB: JAVA_HOME should point to a JDK not a JRE
Using CATALINA_BASE: C:\Program Files\Apache Group\Tomcat 4.1
Using CATALINA_HOME: C:\Program Files\Apache Group\Tomcat 4.1
Using CATALINA_TMPDIR: C:\Program Files\Apache Group\Tomcat 4.1\temp
Using JAVA_HOME: C:\Program Files\JAVA\jdk1.5.0_00
'-Dsun.io.useCanonCaches' is not recognized as an internal or external command, operable program or batch file.
And when I did a sanity check this is what I got,
C:\PROGRA~1\APACHE~1\Tomcat 4.1\bin>dir C:\PROGRA~1\JAVA\jdk1.5.0_0
Volume in drive C is PCSRP21
Volume Serial Number is D84F-A786
Directory of C:\PROGRA~1\JAVA
File Not Found
C:\PROGRA~1\APACHE~1\Tomcat 4.1\bin>dir C:|PROGRA~1\JAVA\jdk1.5.0_00
The system cannot find the path specified.
C:\PROGRA~1\APACHE~1\Tomcat 4.1\bin>dir C:\PROGRA~1\JAVA\jdk1.5.0_00
Volume in drive C is PCSRP21
Volume Serial Number is D84F-A786
Directory of C:\PROGRA~1\JAVA
File Not Found
Does this imply Tomcat is not able to recognize my Java directory ?
Thanks,
bobby.

HOW TO FIND Web Server ...?

when i try to find web server (tomcat ) on my computer with the program below ... iam getting the output like this ....
Web server of sitehttp://localhost:8080is null
note : my tomcat is running at http://localhost:8080
can anyone help me out .....
import java.io.*;
import java.net.*;
public class findServer
public static void main(String a[])
try
URL u=new URL(a[0]);
System.out.println("Web server of site"+a[0]+"is-"+u.openConnection().getHeaderField ("Server"));
catch(Exception e)
System.out.println(e);
thanx

The tomcat won't send the "Server" field; it will send you
the "Servlet-Engine" field instead. This should work:
private static final String getWebServerInfo(String url)
try
    URL u = new URL(url);
    String server = u.openConnection().getHeaderField("Server");
    if(server == null) server = u.openConnection().getHeaderField("Servlet-Engine");
    return server == null ? "Unknown (got null)" : server;
catch(Throwable t) { return "Unknown (got exception: " + t.toString() +")"; }
}

Infopackage Idocs in status 2 - could not find code page for receiver system

Hi,
We just migrated our production system from BW 7.01 non unicode to BW 7.4 on HANA.
We now encounter issues with idocs while loading data into bw from our ECC5 source. When we analyze idocs in the source system it appears with the message "could not find code page for receiver system"
One weird thing is that the idoc seems to have been created before we started the infopackage in bw.. We controlled system time and AS time and everything seems ok.
We did not encounter this issues on our previous migration test runs..
Hope someone can help
Christophe

Hi,
Thanks for responding. We finally found out what the problem was.
We have two applications servers on our ECC with 2 different OS. One of them could not reach the new BW HANA server.
Regards
Christophe

Creating a link to text file in a tomcat server not working in JSP webapp

I am using netbeans to create an web application within my desktop, and then I load the build/web folder to a tomcat server to test the application. Everything works fine. However, when I try to link up my JSP pages to text files (.txt) create by the application on the server, I seem to be getting files that might be kept in a terminal.
When I get the Real path of the servlet context, I find that it is to a C:\ type file rather than a //hostname type of directory. So obviously those files are not being reached.
Does anybody know how to deal this problem?

There are a number of ways to get to the Flash Global Security settings dialog.
My favourite way is just to double click on a Captivate SWF (not the HTM file) to open it in a web browser, then right click on the playing screen to get the Flash context menu. On the context menu, click the Global Settings option.
In the web page that opens, click the link on the left to Global Security Settings.
Add the folder or drive location of your published Captivate content to the Trusted Locations.

Safari and firefox 'cannot find the server' for every other page that i navigate to, unless I turn Wifi off and on. How do I fix this?

Safari and firefox 'cannot find the server' for every other page that i navigate to, unless I turn Wifi off and on. Once i reconnect to the network, the page loads, but after loading a few more pages, the same thing happens all over again.
This happens each and every time, on different Wifi networks, in different locations. On the other hand, I don't ever encounter this problem when I tether my laptop to my mobile phone's 3g/2g network using Personal Hotspot. How do I fix this?

Try this DNS server ...
Open System Preferences > Network > Advanced > DNS
Click + and type:
208.67.222.222
Click + again and do the same.
208.67.220.220
Click OK.
Quit and relaunch both your browsers to test.
If that doesn't help, try here > iOS: Troubleshooting Wi-Fi networks and connections
And here > Wi-Fi: How to troubleshoot Wi-Fi connectivity

Can't find the server for a site, multiple browsers, multiple computers

In recent weeks, possibly coinciding with updates in Firefox (running 3.6.10), Safari (5.0.2) and iTunes (10.0.1), I have only received the prompt, "can't find server" when attempting to connect to the site kcrw.com. Others can get it on their computers in other places, and my iPhone can access when on 3G, but our network here seems affected because all the computers [All macs, some laptops and some desktops, running on OS 10.5.8] here receive this message. I used to be able to go to this site, a radio station, and stream audio or download podcasts. My ISP ran a ping test to the site's server and said that went through, but the browsers and iTunes don't seem to be able to make the transformation to anything I can read. What kind of a problem is this? Apple care was no help either.

HI Alice,
From your Safari menu bar click Safari / Preferences then select the Advanced tab. Now click: Change Settings. That will prompted your System Preferences / Network pane. Make sure the Proxies tab is selected.
If any of the boxes are checked under: Select a protocol to configure.
That could be a factor. If there are, deselect, then click the OK button.
Quit Safari. Relaunch Safari and see if that made a difference.
If it's not a proxy issue, go to a website. If you see the "can't find the server" try reloading the page.
Command + R
Also, try Open DNS - Free / Basic . Includes anti phishing filters.
And help here to manually add DNS. Topic : Manually provided DNS server addresses are higher priority than DHCP's
Carolyn

PLEASE HELP ME TO FIND THE SOLUTION REGARDING "LOGICAL SYSTEM CHANGED"

HAI EVERYBODY,
PLEASE HELP ME TO FIND THE SOLUTION REGARDING "LOGICAL SYSTEM CHANGED" during the material master replication by using middleware parameters.
step1 : i have taken SRM client 810 and named it as CHINNISRM
step2 : i have taken r3 client 810 and named it as CHINNIR3
step3: During material master replication i maintained tables like crmconsum,crmrfcpar,crmparoltp in r3 and smofparsfa in srm client and filtered the objects and loaded the objects through r3ac3,r3ac1,r3as.
step4 : And later i have checked in r3 queues to activate the objects,but i have seen a message like "LOGICAL SYSTEM CHANGED:SEE 588701".according to the oss instructions i have checked in CRMPRLS table in se16 in R3 .there i found out there is one logical client named with T90CLNT810.
oss :588701
Solution
There are different cases in which different forms of processing are
required or where several options exist:
- The logical system name of an R/3 Backend client was changed in
current operation. In this case, the data hangs in the outbound
queues of the R/3 Backend system as specified under point 1 of
the symptom. In this case, the logical system name must be
changed back to the original value. Then the outbound queues
can be reactivated. If no data was transferred to the EBP/CRM
server before the change, also a correctioin of the check table
is possible.
- The same logical system name was used again in a new client of
an R/3 Backend system that was linked to the EBP/CRM server. In
this case, the data is in the inbound queue of the EBP/CRM
server with the exception GUID_FOR_LOGSYS_CHANGED. In this
case, the queue entries which have status SYSFAIL must be rejected, however, not the entire queues. If the new client of the R/3 Backend system you have linked has exactly the same
data as the old client and if it is meant to replace the old
client (that is, this was deactivated), also a correction of
the check tables is possible. In this case, the inbound queues
can be reactivated after the correction.
oss:765018
1. If the situation in your system corresponds to the situation described
under "Reason and Prerequisites" and if symptom 1 occurs, you can
delete the table entry from table CRMPRLS table (there is just one
entry). Since there is no maintenance dialog for this table and you
cannot maintain it using transaction SE16, you must use a report to
delete it. This report is attached to this note as correction
instructions.
Create the report ZZ_DELETE_CRMPRLS in your system and copy the source
code from the correction instructions. You cannot implement this
source code using transaction SNOTE.
You can use the report in every plug-in or plug-in basis system, even
if it is not specified in the validity section.
After you have run the report, you can trigger existing queues again
in transaction SMQ1.
2. If the situation in your system corresponds to the situation described
under "Reason and prerequisite" and if symptom 2 occurs, you can
delete the entry from table CRMMLSGUID (there is just one entry).
Since there is no maintenance entry for this table and you cannot
maintain it using transaction SE16, you must use a report to delete
it. This report is attached to this note as correction instructions.
If they do not yet exist, add the following messages to message class SMOF in your logon language:
Message Message short text
303 User &1 is not allowed to change table &2.
304 User &1 IS not allowed to display table &2.
305 Logical system &1 was not found in table &2.
306 System error! The current client was not
found in table T000.
Create the report ZZ_DELETE_CRMMLSGUID in your system and copy the
source code from the correction instructions. You cannot implement
this source code using transaction SNOTE.
You can use the report for every release of the CRM system, even if it
is not specified in the validity section. The only exceptions are CRM
releases with Support Package versions that are too low such as CRM
Release 3.0 with Support Package 12.
After you have run the report, you can trigger existing queues again
in transaction SMQ1 of the R/3 back-end system or transaction SMQ2 of
the CRM system.
so what should i do to do the replication.please suggest me .untill and unless i solve my problem i cant move to the further activity.i hope you people can solve my problem.thanks in advance.
thanks and best regards,
n.chakradhar

Hi chakradhar,
Did you find a solution to your issue? We are facing a similar issue and looking to figure out how this can be resolved.
BR// 420

"Safari Can't Find the Server" is chronic in Safari under Snow Leopard...

Since moving to Snow Leopard (or perhaps it is just an updated Safari in SL and otherwise not related to SL??) when my Mac starts up from sleep with Safari being already open, I typically find a blank message with "Safari Can't Find the Server"... And just clicking on pages, I sometimes get that same message. Sometimes I get the spinning gear (for way too long) and I've learned to stop it and just click the same link again and more often than not, it opens immediately the second time...
Any ideas??? Is this a bug that Apple needs to fix or do I need to do something to Safari (or something else) to fix this problem???
thanks... bob...

Robert Paris wrote:
Whoa... Now I'm really confused... When I go to my System Preferences, then Network, highlight Airport, then click on Advanced, then choose the DNS tab, all I see under DNS Servers is the internal IP address of my Apple Router (10.x.x.x).. And next to that under Search Domains is hsd1.ca.comcast.net... And that is all there is... And I didn't set any of that up... When I bought my Apple Extreme Router a couple years ago, I was so impressed because I came home, plugged it in, basically said "GO" and the router set it all up and just worked... And I'm pretty sure (though not positive) that the Router put the 10.x.x.x in that preference panel, in other words, pointed to itself for DNS services...
This is effectively saying that the DNS configured in the router will be the default.
So help me understand... If I change the DNS settings on the mac from 10.x.x.x to the OpenDNS values, the router would still have the Comcast values in it??? How does that work??? And if I only change them on my mac, then the rest of the computers on my home network would still be using the original Comcast DNS servers as established on the router, yes??? I mean I think that would have to be...
If you change your Mac, that is what it will use. Other computers will use whatever
they are configured to use.
See my confusion??? Again, I know only enough about Network settings to know that if I click a wrong button I could make a lot of trouble... So I don't move until I understand what at least a little more than clearly I know now...
So how do local (mac) settings for DNS play (or not) with DNS settings up at the router level???
The local settings should override anything else since that is what will
be used first. They have no interaction with what is at the router level.
thanks... bob..
Dave

Getting error message in tomcat server

Have a look at the following programs:
AuthenticationFilter_
import javax.servlet.*;
import java.io.*;
import java.sql.*;
public class AuthenticationFilter implements Filter
     ServletContext sc;
     Connection con;
public void init(FilterConfig f) throws ServletException
System.out.println(f.getFilterName() + "Filter Initialized");
String d = f.getInitParameter("driver");
String url = f.getInitParameter("url");
String user = f.getInitParameter("user");
String pwd = f.getInitParameter("password");
try
     Class.forName(d);
     con = DriverManager.getConnection(url,user,pwd);
     System.out.println("Connection Established");
catch (Exception e)
     e.printStackTrace();
sc = f.getServletContext();
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws ServletException,IOException
Statement st = null;
ResultSet rs = null;
String user = request.getParameter("user");
String pwd = request.getParameter("password");
try
     st = con.createStatement();
     String sql = "SELECT * FROM OURUSERS WHERE usr = " + user + " and password = " + pwd + " ";
     rs = st.executeQuery(sql);
     if(rs.next())
          chain.doFilter(request,response);
     else
          sc.getRequestDispatcher("/error.html").forward(request,response);
catch (Exception e)
     e.printStackTrace();
finally
try
     if(rs!=null)
          rs.close();
     if(st!=null)
          st.close();
catch (Exception e)
     e.printStackTrace();
}//doFilter()
public void destroy()
try
     if(con!=null)
          con.close();
catch (Exception e)
     e.printStackTrace();
*2)_HitCounterFilter__
import javax.servlet.*;
import java.io.*;
public class HitCounterFilter implements Filter
     ServletContext sc;
     int count;
public void init(FilterConfig f)throws ServletException
System.out.println(f.getFilterName() + "Filter Initialized");
sc = f.getServletContext();
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws ServletException,IOException
chain.doFilter(request,response);
count++;
sc.log("Number of times request came to LoginServlet is " + count);
public void destroy()
*3) LoginServlet*
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class LoginServlet extends HttpServlet
     public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
pw.println("<HTML> <BODY BGCOLOR=yellow>");
pw.println("<H1> WELCOME TO OUR WEBSITE</H1>");
pw.println("</BODY>");
pw.println("</HTML>");
pw.close();
web.xml
<web-app>
<filter>
<filter-name>authenticate</filter-name>
<filter-class>AuthenticationFilter</filter-class>
<init-param>
<param-name>driver</param-name>
<param-value>oracle.jdbc.driver.OracleDriver</param-value>
</init-param>
<init-param>
<param-name>url</param-name>
<param-value>jdbc:oracle:thin:@localhost:1521:orcl</param-value>
</init-param>
<init-param>
<param-name>user</param-name>
<param-value>scott</param-value>
</init-param>
<init-param>
<param-name>password</param-name>
<param-value>tiger</param-value>
</init-param>
</filter>
<filter>
<filter-name>hitcount</filter-name>
<filter-class>HitCounterFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>authenticate</filter-name>
<url-pattern>/nit</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/nit</url-pattern>
</servlet-mapping>
</web-app>
Error_
java.sql.SQLException: ORA-00904: "SANDY": invalid identifier
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:189)
at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:242)
at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:554)
at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1478)
at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteDescribe(TTC7Protocol.java:
677)
at oracle.jdbc.driver.OracleStatement.doExecuteQuery(OracleStatement.jav
a:2371)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStateme
nt.java:2660)
at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:
777)
at AuthenticationFilter.doFilter(AuthenticationFilter.java:37)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ss(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:48
9)
at java.lang.Thread.run(Thread.java:619)
The above error message i am getting in Tomcat server,i am having Oracle 11g V1..My SQL prompt is open and i have a table named "ourusers"...Can anyone kindly gimme the solution for this problem+*
Edited by: sandy on Nov 9, 2010 8:59 AM

java.sql.SQLException: ORA-00904: "SANDY": invalid identifier
Looks like the sql you are submitting is invalid.
Print out a copy of the sql you are trying to run and you will probably get:
SELECT * FROM OURUSERS WHERE usr = Sandy and password = secretThat isn't valid sql. It is missing quotes around the values you are checking.
This is the corrected sql query:
SELECT * FROM OURUSERS WHERE usr = 'Sandy' and password = 'secret'so one solution would be:
String sql = "SELECT * FROM OURUSERS WHERE usr = '" + user + "' and password = '" + pwd + "' ";However that is not optimal. It exposes your code to sql injection attack.
The better way is to use a prepared statement:
String sql = "SELECT * FROM OURUSERS WHERE usr = ? and password =?";
st = con.prepareStatement(sql);
st.setString(1, user);
st.setString(2, password);
rs = st.executeQuery();cheers,
evnafets

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