issue with web.xml

[Babu Singh]

i have some servlet classes and jsp files.

i made a Servlet class ServletHome.java which work only transfer the control to Vij.jsp. Vij.jsp in turn call a another jsp file Indus.jsp. this jsp transfer the control to another servlet class ServletOne.java which perform
some business logic on some java classes then dispaly the result on same jsp file Indus.jsp from where i called ServletOne.java

i am configuring web.xml.but due to some mistake in web.xml, i am founding exception.

web.xml

 

<web-app>
 
<servlet>
<servlet-name>ServletOne</servlet-name>
<servlet-class>ServletOne<servlet-class>
</servlet>
 
<servlet>
<servlet-name>ServletHome</servlet-name>
<servlet-class>ServletHome<servlet-class>
</servlet>
 
<servlet-mapping>
<servlet-name>ServletHome</servlet-name>
<servlet-name>ServletOne</servlet-name>
<url-pattern>/Vij.jsp</url-pattern>
</servlet-mapping>
 
<welcome-file-list>
<welcome-file>ServletHome</welcome-file>
</welcome-file-list>
 
</web-app>

   

[Seetharaman Venkatasamy]

particularly your servlet-mapping is wrong .
http://jakarta.apache.org/cactus/integration/howto_tomcat.html

[Babu Singh]

please suggest to rectify the web.xml file.

[Seetharaman Venkatasamy]

<servlet-mapping>
<servlet-name>ServletHome</servlet-name>
<servlet-name>ServletOne</servlet-name> //remove
<url-pattern>/Vij.jsp</url-pattern>
</servlet-mapping>

remove one of the servlet-name. please show some effort . it will help you to solve problem / get knowledge

[sujith Acharya]

   
 <servlet-mapping>  
 <servlet-name>ServletHome</servlet-name>  
 <servlet-name>ServletOne</servlet-name>  
 <url-pattern>/Vij.jsp</url-pattern>  
 </servlet-mapping> 

Here you are mapping url-pattern to two different servlet name.

[Babu Singh]

i did some change in web.xml

  
<web-app>
 
<servlet>
<servlet-name>ServletOne</servlet-name>
<servlet-class>ServletOne</servlet-class>
</servlet>
 
<servlet>
<servlet-name>ServletHome</servlet-name>
<servlet-class>ServletHome</servlet-class>
</servlet>
 

<servlet>
<servlet-name>Vij</servlet-name>
<jsp-file>Vij.jsp</jsp-file>
</servlet>

<servlet-mapping>

<servlet-name>vij</servlet-name>
<url-pattern>/ServletHome</url-pattern>
</servlet-mapping>
 

<servlet-mapping>

<servlet-name>ServletOne</servlet-name>
<url-pattern>/Vij.jsp</url-pattern>
</servlet-mapping>
 
<welcome-file-list>
<welcome-file>ServletHome</welcome-file>
</welcome-file-list>
 
</web-app>

 

now it deployed. but when i click on the link of ServletHome , it give error Error 404 not found.

 Error 404--Not Found
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:
10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.
   

ServletHome.java is:

 
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.net.*;
public class ServletHome extends HttpServlet
{

public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException
{
try
{
RequestDispatcher rd=request.getRequestDispatcher("/Vij.jsp");
rd.forward(request,response);
System.out.print("Here going..........");
}

catch(Exception e)
{
System.out.print(e);
}
}
}
  

please help.

[Seetharaman Venkatasamy]

How do you triggering the servlet?

[William Brogden]

 <servlet-class>ServletOne<servlet-class>      

I really should have a handy cut and paste to say this since it is a common beginner error for people moving from desktop applications to a container hosted environment.

ALL classes in servlets should be in named packages and the class files stored accordingly.
What you have there is a class in the "default" package - a JVM will look for it in the "current" directory. You have no control over the current directory therefore the class is never loaded.

Bill

[Babu Singh]

current directory is Webproject

E:\Webproject\WEB-INF\classes

[Bear Bibeault]

Perhaps you missed the point: place the Servlets in a non-default package or they won't work.

[Babu Singh]

i placed all servlet classes in a servlet folder under E:\Webproject\WEB-INF\classes

i also placed vij folder under servlet class. vij folder have some java classes. one servlet use this java classes. if i did not place the vij folder under servlet folder one servlet are not compile.

so root for servlets classes is:
E:\Webproject\WEB-INF\classes\servlet

root for java classes is:
E:\Webproject\WEB-INF\classes\servlet\vij

web.xml is:

  
<web-app>  
   
<servlet>  
<servlet-name>ServletOne</servlet-name>  
<servlet-class>ServletOne</servlet-class>  
</servlet>  
   
<servlet>  
<servlet-name>ServletHome</servlet-name>  
<servlet-class>/servlet/ServletHome</servlet-class>  
</servlet>  
   
  
<servlet>  
<servlet-name>Vij</servlet-name>  
<jsp-file>/Vij.jsp</jsp-file>  
</servlet>  
  
<servlet-mapping>  
  
<servlet-name>vij</servlet-name>  
<url-pattern>/servlet/ServletHome</url-pattern>  
</servlet-mapping>  
   
  
<servlet-mapping>  
  
<servlet-name>ServletOne</servlet-name>  
<url-pattern>/Vij.jsp</url-pattern>  
</servlet-mapping>  
   
<welcome-file-list>  
<welcome-file>ServletHome</welcome-file>  
</welcome-file-list>  
   
</web-app>  
  

[Seetharaman Venkatasamy]

  <servlet-class>/servlet/ServletHome</servlet-class> //wrong 

it must be

  <servlet-class>servlet.ServletHome</servlet-class>  

I do suggest you to *google* about web application structure and make a *Hello World* Servlet

[William Brogden]

current directory is Webproject

E:\Webproject\WEB-INF\classes

No, you have little to no control over what a servlet container thinks is the "current" directory.

You should become familiar with the official servlet API and the directory structure requirements. Why not start at this Sun/Oracle site instead of flailing around.

Bill

[Mark E Hansen]

Seetharaman Venkatasamy wrote:

  <servlet-class>/servlet/ServletHome</servlet-class> //wrong 

it must be

  <servlet-class>servlet.ServletHome</servlet-class>  

Yes, except that I think an incorrect value has been used for the servlet class, so I don't think servlet is actually the package name for the class file - instead, I think the poster placed the url pattern into this field by mistake. I think the poster still doesn't understand the need for packages, or doesn't understand what they are.

Seetharaman Venkatasamy wrote:I do suggest you to *google* about web application structure and make a *Hello World* Servlet

That's good advice. There's good 'getting started' help in the ServletsFaq on the Ranch.