Servlet Behaviour
I am testing my first servlet and have strange result.
I have a simple html page called start.html
<HTML>
<HEAD>
<TITLE> Test Servlet </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<FORM METHOD="POST" ACTION="http://localhost:8080/testservlet">
Please Enter your Name
<INPUT TYPE="text" NAME="contact">
<INPUT TYPE="submit" value="Submit">
</FORM>
</BODY>
</HTML>
I've created the servlet called testservlet.java and here's the code for the servlet.
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.lang.Object.*;
publicclass TestServletextends HttpServlet
{
publicvoid init(ServletConfig config)
throws ServletException
{
super.init(config);
}
publicvoid doGet(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, java.io.IOException
{
doPost(req, resp);
}
publicvoid doPost(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException,
java.io.IOException
{
/** set content type and get writer */
resp.setContentType("text/html");
PrintWriter out=resp.getWriter();
String contact=req.getParameter("contact");
out.println(GenerateOutput(contact));
out.close();
}
private String GenerateOutput(String contact)
{
StringBuilder sb=new StringBuilder();
sb.append("<html><body><head><title>Test Servlet response</title></head>");
sb.append("Your Name is "
+ contact +"
");
sb.append("</body></html>");
return sb.toString() ;
}
publicvoid destroy(){
super.destroy();
}
}
I've deployed the servlet to the Sun Application Server.
If I run the html page and enter the name servlet returns the list of file in the testservlet directory instead of the correct output. It looks like this.
http://localhost:8080/testservlet/
Directory Listing for
Directory Filename Size
What's wrong ?
Thanks
Mikhail
1. Is the package required for the servlet to work ? The example which I've seen are not using the package.
2. I have deployed the WEB-INF folder this way
WEB-INF
/classes
TestServlet.class
web.xml
sun-web.xml
here's the code for the web.xml file
<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
-->
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>testservlet</display-name>
<distributable/>
</web-app>
here's the code for the sun-web.xml file
<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
-->
<!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 8.1 Servlet 2.4//EN" "http://www.sun.com/software/appserver/dtds/sun-web-app_2_4-1.dtd">
<sun-web-app>
<context-root>/testservlet</context-root>
</sun-web-app>
The servlet was deployed successfully on the Sun Application Server 9 using the Web Application Deployment admin.
3. This is done for testing only, I understand that
Mikhail
> 1. Is the package required for the servlet to work ?
> The example which I've seen are not using the
> package.
In general, I believe the answer is yes. You might be looking at old examples.
In Tomcat I know that packages are required.
> 2. I have deployed the WEB-INF folder this way
> > WEB-INF
> /classes
> TestServlet.class
> web.xml
> sun-web.xml
>
>
How old ARE those examples? What's in that sun-web.xml? You should not need any extensions to deploy a simple servlet like this.
> here's the code for the web.xml file
>
> >
> <?xml version="1.0" encoding="UTF-8"?>
>
> <!--
> Copyright 2004-2005 Sun Microsystems, Inc. All
> rights reserved.
> Use is subject to license terms.
> -->
>
> <web-app version="2.4"
> xmlns="http://java.sun.com/xml/ns/j2ee"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
> http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
><display-name>testservlet</display-name>
> <distributable/>
> </web-app>
>
>
This is utterly wrong. You didn't map your servlet.
> here's the code for the sun-web.xml file
>
> >
> <?xml version="1.0" encoding="UTF-8"?>
>
> <!--
> Copyright 2004-2005 Sun Microsystems, Inc. All
> rights reserved.
> Use is subject to license terms.
> -->
>
> <!DOCTYPE sun-web-app PUBLIC "-//Sun Microsystems,
> Inc.//DTD Application Server 8.1 Servlet 2.4//EN"
> "http://www.sun.com/software/appserver/dtds/sun-web-ap
> p_2_4-1.dtd">
> <sun-web-app>
><context-root>/testservlet</context-root>
> sun-web-app>
>
>
You should not need this.
> The servlet was deployed successfully on the Sun
> Application Server 9 using the Web Application
> Deployment admin.
"successfully"?Then why are you here?
> 3. This is done for testing only, I understand that
>
> Mikhail
I'd read more about the details of deploying web apps on the Sun app server. Learn how to package it into a WAR file. That'll work, ir you do it properly.
%
