6 Errors in my first servlet prog..help pls

[miaaa00]

Hello Friends...

I am a newbie on your site as well as i am new to servlets programming..
So need your help to solve my problem..

I have created a small servlet application as my first servlet program. But when i try to compile it then it gives me the following error..
javac command is not able to compile the program..

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Ex1Http extends HttpServlet
{
    public void service(HttpServletRequest req,HttpServletResponse res)
    throws IOException,ServletException
    {
        PrintWriter out = res.getWriter();
        res.setContentType("text/html");
        out.println("Hi....");
    }
}

javac is not able to compile the servlet code..what could be the problem ???

The error is as follows:

C:\>javac Ex1Http.java
Ex1Http.java:2: package javax.servlet does not exist
import javax.servlet.*;
^
Ex1Http.java:3: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
Ex1Http.java:5: cannot find symbol
symbol: class HttpServlet
public class Ex1Http extends HttpServlet
^
Ex1Http.java:7: cannot find symbol
symbol : class HttpServletRequest
location: class Ex1Http
public void service(HttpServletRequest req,HttpServletResponse res)
^
Ex1Http.java:7: cannot find symbol
symbol : class HttpServletResponse
location: class Ex1Http
public void service(HttpServletRequest req,HttpServletResponse res)
^
Ex1Http.java:8: cannot find symbol
symbol : class ServletException
location: class Ex1Http
throws IOException,ServletException
^
6 errors

I have already set my classpath for jdk as well as tomcat..

Thanks in advance if you could help me out..

[akiravelmont]

It is so simple to resolve.
The thing which we have to do is just set the CLASSPATH . To set the CLASSPATH we need servlet-api.jar file,
How to set the classpath:

goto mycomputer icon->right click on it-> select properties-> choose tab advanced-> select environment variables-> in the user variables click new type CLASSPATH in first field and in second paste the total path of the jar file like d:/folder/servlet-api.jar;.; then click on ok.

second one is goto command promt and go to the working directory and use the below command
set CLASSPATH=path/servlet-api.jar;.;

but if you use this we have to set the classpath every time we open the cmd prompt. ok.

[miaaa00]

Thanks for the reply...

But i have already set the classpath as per the environment variables to:

classpath - C:\tomcat7\lib\servlet-api.jar
path - C:\Java\jdk1.6.0_24\bin

After that also the java compiler is not been able to find the servlet file ??

[miaaa00]

If i am wrong somewhere then do let me suggest the whole path to be set as per the environment variable. My Tomcat and JDK are in C: drive..folder

Classpath - " "
Path - " "
Java_Home - " "

how to set..what to set ??

[akiravelmont]

how you ended the classpath for every path we have to put ;.; at end otherwise it wont work.

if you done exactly.

copy the servlet-api.jar to your cwd(current working directory) and set the class path like this:

copy serlvet-api.jar to D:/cwd

in prompt-
d:\cwd\set CLASSPATH=servlet-api.jar;.; (then press enter)

then compile the program
d:\cwd\javac MyServlet.java


check this it definitely works.:rolleyes::cool:

[Tolls]

First off, don't set the environment variables on your system.
That is not the place to set Java classpaths.

Use -cp to set the classpath on the call to javac, or set it locally as mentioned above (set CLASSPATH=etc etc). I'd stick that in a script for compiling that project (or learn ant). If you have all your jars in a single lib folder under your project (which is generally a good idea) then "javac -cp "lib/*.jar";." is a nice easy command to use.