asked on

servlet example issue

Hi,

I am trying below servlet on eclipse and tomcat 9

https://www.tutorialspoint.com/servlets/servlets-first-example.htm

package com.servlet;
// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

// Extend HttpServlet class
public class HelloWorld extends HttpServlet {
 
  private String message;

  public void init() throws ServletException
  {
      // Do required initialization
      message = "Hello World";
  }

  public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
            throws ServletException, IOException
  {
      // Set response content type
      response.setContentType("text/html");

      // Actual logic goes here.
      PrintWriter out = response.getWriter();
      out.println("<h1>" + message + "</h1>");
  }
  
  public void destroy()
  {
      // do nothing.
  }
}

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http://localhost:65535/TestServlets/servlet/com.servlet.HelloWorld

when i execute
i am getting wrong result
HTTP Status 404 - /TestServlets/servlet/com.servlet.HelloWorld

typeStatus report

message/TestServlets/servlet/com.servlet.HelloWorld

descriptionThe requested resource is not available.

Apache Tomcat/9.0.0.M15

please advise how to fix and run this servlet. please advise

gudii9

ASKER

servlet code under Java Resources-->src then com.servlet package

package com.servlet;
// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

// Extend HttpServlet class
public class HelloWorld extends HttpServlet {
 
  private String message;

  public void init() throws ServletException
  {
      // Do required initialization
      message = "Hello World";
  }

  public void doGet(HttpServletRequest request,
                    HttpServletResponse response)
            throws ServletException, IOException
  {
      // Set response content type
      response.setContentType("text/html");

      // Actual logic goes here.
      PrintWriter out = response.getWriter();
      out.println("<h1>" + message + "</h1>");
  }
  
  public void destroy()
  {
      // do nothing.
  }
}

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web.xml is

<?xml version="1.0" encoding="UTF-8"?>
<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">

	 <servlet>
   <servlet-name>HelloWorld</servlet-name>
   <servlet-class>HelloWorld</servlet-class>
</servlet>

<servlet-mapping>
   <servlet-name>HelloWorld</servlet-name>
   <url-pattern>/HelloWorld</url-pattern>
</servlet-mapping>
 
</web-app>

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gudii9

ASKER

@WebServlet(
      description = "sss",
      urlPatterns = { "/HelloServlet1" },
      initParams = {
                  @WebInitParam(name = "aaa", value = "bbb", description = "ccc")
      })

if i give above on top of servlet class no need of web,xml entry looks like

gudii9

ASKER

package com.gp.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class OneServlet
 */
@WebServlet("/OneServlet")
public class OneServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public OneServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

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above when i ran on tomcat 9 within eclipise by right clicking on serlvet and run on server
http://localhost:60000/TestServletProject2/OneServlet
i got below output
Served at: /TestServletProject2

addding below
@WebServlet("/OneServlet")

seems enough and no need to make web.xml entry
servletsq.png

mccarl

So can you please clarify what your question is?

gurpsbassi

Another guddi9 goose chase.
I wish EE had emoji's to express what im feeling right now.

ASKER CERTIFIED SOLUTION

rrz

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