i’m attempting to use apache tomcat 7.0 tomcat7 to access java servlets. I have

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Editorial Team

Asked: May 26, 20262026-05-26T17:22:15+00:00 2026-05-26T17:22:15+00:00

i’m attempting to use apache tomcat 7.0 tomcat7 to access java servlets. I have

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i’m attempting to use apache tomcat 7.0 tomcat7 to access java servlets.

I have created a folder to hold all my webapp files under the ROOT folder in webapps.
The file structure is like this.

Tomcat 7.0/webapps/myWebApp
- HelloHome.html
- WEB-INF
  - web.xml
  - classes
    - com
      - training
        
        HelloServlet.java
        
        HelloServlet.class

to call the servlet this web.xml code was used:

<?xml version="1.0" encoding="ISO-8859-1"?>

<web-app version="3.0"
  xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   
  http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

   <!-- To save as "hello\WEB-INF\web.xml" -->

   <servlet>
      <servlet-name>HelloWorld</servlet-name>
      <servlet-class>com.training.HelloServlet</servlet-class>
   </servlet>

   <!-- Note: All <servlet> elements MUST be grouped together and
         placed IN FRONT of the <servlet-mapping> elements -->

   <servlet-mapping>
      <servlet-name>HelloWorld</servlet-name>
      <url-pattern>/sayhello</url-pattern>
   </servlet-mapping>

</web-app>

the actual java code (compiled to generate a class file under the classes folder):

//To save as "<TOMCAT_HOME>\webapps\hello\WEB-INF\classes\HelloServlet.java"
package com.training;

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

public class HelloServlet extends HttpServlet {
   @Override
   public void doGet(HttpServletRequest request, HttpServletResponse response)
         throws IOException, ServletException {

      // Set the response MIME type of the response message
      response.setContentType("text/html");
      // Allocate a output writer to write the response message into the network socket
      PrintWriter out = response.getWriter();

      // Write the response message, in an HTML page
      try {
         out.println("<html>");
         out.println("<head><title>Hello, World</title></head>");
         out.println("<body>");
         out.println("<h1>Hello, world!</h1>");  // says Hello
         // Echo client's request information
         out.println("<p>Request URI: " + request.getRequestURI() + "</p>");
         out.println("<p>Protocol: " + request.getProtocol() + "</p>");
         out.println("<p>PathInfo: " + request.getPathInfo() + "</p>");
         out.println("<p>Remote Address: " + request.getRemoteAddr() + "</p>");
         // Generate a random number upon each request
         out.println("<p>A Random Number: <strong>" + Math.random() + "</strong></p>");
         out.println("</body></html>");
      } finally {
         out.close();  // Always close the output writer
      }
   }
}

i then hit: http://localhost:8080/myWebApp/sayhello
and get a 404 error. any ideas as to what i am doing wrong?