Servlets in Tomcat

I am trying to run servlets using Tomcat. I have them working and displaying but as soon as I make a change to a servelt and re-compile and refresh the browser the change do not take effect. I have to shutdown and restart tocat. Surely this can't be right. can anyone help with correcting this problem?

Lesta,
For convenience there's a Tomcat admin console. The admin console runs through a web browser and allows you to restart an application, restart a context ect. I think you can also install or reinstall entire ears through it now.
There's some setup to do before you can use the admin console. I seem to remember there being an XML user/password file somewhere...
In a production environment you don't want to shutdown and restart the daemon like you are doing. It will just annoy the heck out of your users.
Hope this helps.
-Bryan

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How to run a servlet in tomcat 5.0.

Hi all,
how to run a servlet in tomcat 5.0
please tell me the entire procedure....(directory structure)
step by step....

hi :-)
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Servlets.html
or
http://www.google.com.ph/search?hl=en&q=java+servlet+tutorial&btnG=Google+Search&meta=
regards,

Servlet on tomcat 4.1.18

I am facing a problem of running servlets on Tomcat 4.1.18. The problem seems to be in the configuration. In the webapps folder, I created a folder greeting. In that, the WEB-Inf\classes folder has GreetingServlet.class.
webapp\greeting has index.html that has to FORM ACTION set to /greeting/servlet/GreetingServlet.
On clicking the submit button the message I get is that the resource /greeting/servlet/GreetingServlet is not found.
Can anybody help in configuring the server so that the above mentioned servlet gets recognized?
Thanks.
Amitabh.
[email protected]

My application is located at %TOMCAT_HOME%\webapps.
%TOMCAT_HOME%\webapps\greeting\WEB-INF\web.xml has the following:
<web-app>
<servlet>
<servlet-name>greeting</servlet-name>
<servlet-class>GreetingServlet</servlet-class>
</servlet>
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<FORM ACTION="/greeting/servlet/GreetingServlet" METHOD="POST">
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Have I missed some point?
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Thanks.
Amitabh.
[email protected]

Need to enable autoreload feature for servlet in Tomcat

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I wants to enable autoreload feature for servlet in tomcat so that i need not to stop tomcat 4.0 web server again and again
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http://jakarta.apache.org/tomcat/tomcat-4.1-doc/config/context.html
It is amazing what reading the manual might do for ya.

How to run Servlet in TOMCAT

I am new to Java Servlets. I am trying to run a servlet on TOMCAT but I don't know where to place my Servlet class file. TOMCAT works ok with sample jar file. Please guide.
-- HTML code
<HTML>
<HEAD>
<TITLE> Request Object </TITLE>
</HEAD>
<BODY>
<FORM METHOD="POST" ACTION="/servlet/WelcomeServlet">
Enter your Name: <INPUT TYPE=TEXT NAME="myName">
<INPUT TYPE="SUBMIT" VALUE="Send Name">
</FORM>
</BODY>
</HTML>
-- Servlet Code
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class WelcomeServlet extends HttpServlet {
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String Name = request.getParameter("myName");
PrintWriter out = response.getWriter();
String mName = "test";
try {
mName = gName("AAA","VVV");
catch (SQLException ex)
out.println("SQLException");
out.println("Welcome 1.1 " + Name + " !" + " mName " + mName);
public String gName(String inputUserid, String inputPwd)
throws SQLException{
String vname = "Test";
return vname;
thanks
Vineet

I have Tomcat version 4.0 installed on my machine. If you look at the directory where you have Tomcat installed, you should find the directory structure:
tomcat-folder/webapps/root/web-inf/classes
Try placing your class files in the classes folder.

How to Run servlet in Tomcat 5.5.9

hi
How to run servlet in tomcat 5.5.9?how to set context path in server.xml of conf folder in tomcat since there is no context tag in server.xml.
Jiten

Hi ! I have a similar problem, well, it's along the same line ...
I'm using NetBeans 4.1, and i've coded a servlet. Using NetBeans to launch my servlet (with the bundled Tomcat 5.5.7) works fine, however i need to deploy my application unto a Tomcat 5.5.9 server.
Thus, i copied the WAR file generated by NetBeans into the Tomcat 5.5.9 webapps directory, and Tomcat expands it.
Problem is when i run my JSP pages with the form tags, they do not work on the Tomcat 5.5.9 environment. Anyone knows why?
(These work on the NetBeans Tomcat bundle 5.5.7)
My form action :
<form name="index" method="get" action="PageServlet">
My web.xml :
<servlet>
<servlet-name>PageServlet</servlet-name>
<servlet-class>application.PageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>PageServlet</servlet-name>
<url-pattern>/PageServlet</url-pattern>
</servlet-mapping>
I'm really stumbed on why it doesn't work in Tomcat 5.5.9, any help is greatly appreciated, thanks in advance ^_^

How to run Servlet in Tomcat 5.5.7 Server

Hi,
How to run Servlet in Tomcat 5.5.7 Server. I mean where I should copy my *.class file.
Thanks in Advance.
bbye.

In order to complile the servlet you need to tell java where to find the servlet libary (as stated above by setting the class path). or (much easier IMO)
copy the servlet-api.jar to
JavaInstallDirectory\jre\lib\ext

Running servlet in tomcat 4.1.18

Hi,
I am new to servlet and am having trouble running a simple servlet on tomcat 4.1.18. I keep getting an Error 404 resource not found. will someone show me how to run servlet on tomcat?Please.
Thanks

To start, make sure you have specified the servlet and mapping in your application's WEB-INF/web.xml file.

<servlet>
    <servlet-name>yourServletName</servlet-name>
    <servlet-class>path.to.Servlet</servlet-class>
</sevlet>
<servlet-mapping>
    <servlet-name>yourServletName</servlet-name>
    <url-pattern>/servlet/yourServletName</url-pattern>
</servlet-mapping>

How Can I Run Servlet in tomcat

Hi My Friends
Please can any one tell me how can I Run Servlet in tomcat using my own Virtual Directory � my ask about , what is the structure it must be make it in the hierarchy of the sub folder of Virtual Directory , and in watch folder it must be put the servlet files and there is any change it must be make it in any file of the tomcat files and so on
Please give my full details about this thing
And thanks

What version of Tomcat are u using?

Run servlet in tomcat 4.1

Hi ,
could someone please help me.
Iam trying to run servlet in tomcat4.1 but in vain.
please help

hi
If you want run a servlet in tomcat4.1,First write one html file,and servlet file.
finally you need to write web.xml.this file will be placed in web-inf folder.
You need to write this tags to run a servlet in tomcat 4.1
<servlet>
<servlet-name> name of the servlet</servlet-name>
<servlet-class>class name of the servlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>name of the servlet</servlet-name>
<url-pattern>/the ref name which u want call servlet</url-pattern>
<servlet-mapping>
Here the servlet name sholud be same .
The url pattern name must match with the action attribute value in html.
now you place your html file in root folder.
place your servlet class file in classes folder.
start ur browser type this http://localhost:8080/htmlfilename.

Newbie question about loading servlets on tomcat

I have what is probably a very basic question about loading simple servlets on to tomcat to test its installation. I have followed instructions from numerous tutorials to the letter but still I can't get it to work.
I have installed tomcat on win2k in c:\tomcat. I set up the jdk, environment vars (JAVA_HOME, CATALINA_HOME, TOMCAT_HOME) which all point at the correct dirs. I can compile a servlet without errors. I can also place a test jsp and html file into the root directory and they both work fine.
However, now I am trying a test servlet and no matter what I do it gives me a 404. I have a servlet class file called "HelloServlet.class" which I placed into the %install_dir%\webapps\ROOT\WEB-INF\classes directory. I try to reference it using this url:
http://localhost/servlet/HelloServlet
Tomcat is configured to use port 80 and has been restarted after adding the servlet class file. Does anyone have a clue why this is not working for me?
Many thanks
Marc

You have to add in the web.xml file that it is in the WEB-INF dir, the information about your servlet. An example:
<web-app>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>
</web-app>

Getting error 404 when iam running a simple login servlet in tomcat

hi
this is my Login.java
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Login extends HttpServlet
     public void doPost(HttpServletRequest rq, HttpServletResponse rs)
          String username =rq.getParameter("username");
          String password =rq.getParameter("password");
try{
          rs.setContentType("text/html");
          PrintWriter out=rs.getWriter();
          out.println("<html><body>");
          out.println("thank u, " + username + "you r logged sucessfully");
          out.println("</body></html>");
          out.close();
          }catch(Exception e){
               e.printStackTrace();
i have saved in the form ofC:\Program Files\apache-tomcat-4.1\webapps\sravan\WEB-INF\classes\Login.class
where sravan is my folder
step 2: Login.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>login page</title></head>
<body>
<h1> WELCOME TO THE SERVLET HOME PAGE</h1>
ENTER UR USERNAME AND PASSWORD
<form action="/sravan/Login" method="Post">
     username<input type="text" name="username" >
     password<input type="password" name="password" >
     <input type="submit" value="submit"></form>
     </body>
</html>
i have saved in the form C:\Program Files\apache-tomcat-4.1\webapps\sravan\Login.html
step3:
my web.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>beginning j2ee</display-name>
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>Login</url-pattern>
</servlet-mapping>
</web-app>
i have saved in C:\Program Files\apache-tomcat-4.1\webapps\sravan\WEB-INF\web.xml
step4:
here is my server.xml
<Context path="/sravan" docBase="sravan" debug="0" reloadable="true" privileged="true"/>
saved in C:\Program Files\apache-tomcat-4.1\webapps\sravan\WEB-INF\server.xml
everything is fine....program is compiled ...but when iam running the servlet in tomcat iam getting error 404 Login.html not found....
so plz kindly help me this my first servlet .....

There seems not to be any '.html' in your url-pattern
<url-pattern>Login</url-pattern>- so i presume you should use
http://yourhost/Logininstead.

How to run a servlet in tomcat

how i can run a servlet in tomcat?

how i can run a servlet in tomcat?Don't try to do that yet; in your other thread you have shown that your are
not capable yet of setting up a proper development environment.
Take my advice, you can't walk or run yet so start with the basics.
kind regards,
Jos

How to run a servlet in tomcat 5.5

Hi,iam new to servlets,please help me regarding running a servlet in tomcat 5.5,
I just want an example servlet to run first,
the below is the code for the same :-
//ExampleServlet.java
package sig;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ExampleServlet extends HttpServlet {
     public void init(ServletConfig config) throws ServletException{
          super.init(config);
     public void service(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException{
          PrintWriter out = res.getWriter();
          out.println("<HTML>");
          out.println("<BODY>");
          out.println("<p>Hello World</p>");
          out.println("</BODY>");
          out.println("</HTML>");
I have created a new folder named "SignatureServlet" under the "webapps" folder of tomcat and have created a "WEB-1NF" folder under it,
again i have kept my "ExampleServlet.class" inside the "WEB-1NF->classes" folder and the entries for my servlet in the "web.xml" file are:-
<servlet>
<servlet-name>ExampleServlet</servlet-name>
<servlet-class>ExampleServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ExampleServlet</servlet-name>
<url-pattern>/ExampleServlet</url-pattern>
</servlet-mapping>
still when iam trying to access the servlet using "http://localhost:8080/ExampleServlet/"
iam getting a HTTP:404 error
The requested resource () is not available.,
please help

You better ask this on a Tomcat forum...
Timo

How to run a servlet in Tomcat 5.0 server

HI Everybody,
I want to know how to run the servlet file on my tomcat 5.0 server. that is where to place a class file and deployment details.
Thanks In ADVANCE

Sourav_cs wrote:
I am a biginner to start servlet i get confusion to configure servlet in tomcat 5 where it should be saved in tomcat directory and how to execute that as first timeHi,
goto
tomcat 5.0\webappsnow create a folder here. this is your webapplication project name. Let's suppose it as "TestApp"
inside this create directories as follows :
TestApp
        |
        |-----JSP/htmls( if you have any )
        |
        |-----WEB-INF(File Folder)
                   |
                   |-----web.xml
                   |-----lib ( Directory. place all the .jar files which are required for this project(if any) )
                   |-----classes ( .class files. )[all of your java code should be placed here.](servlets / beans/ pojo )this is the general Directory structure of a web application. now you've to place the compiled .class file of your servlet in the "TestApp\WEB-INF\classes" directory. make sure that you've configured the servlet in Deploment Desctiptor, i.e, web.xml.
now start the server and type the url like : "http://localhost:8080/TestApp/TestServlet"
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go through some tutorials .. then you can easily know that
Diablo

Servlets in Tomcat

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