Getting HTTP Status 404 error when trying to run servlet

Question

I have a problem with my simple servlet that I am trying to run, Hello.java. I made it in eclipse, then placed the file it in the webapps/ServletTest/WEB-INF/classes folder and compiled it, creating the file Hello.class in the same folder. I then modified my web.xml file to map the servlet and tried to run it through the following address

http://localhost:8080/ServletTest/Hello

However, this did not work, giving the following error

HTTP Status 404 -

type Status report

message

description The requested resource is not available. Apache Tomcat/7.0.42

The mapping in the web.xml file looks like this:

<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>Main.Hello</servlet-class>
</servlet>  

<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/Hello</url-pattern>
</servlet-mapping>

The code of the servlet:

package Main;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/Hello")
public class Hello extends HttpServlet {
private static final long serialVersionUID = 1L;
public Hello() {
super();
 }

protected void doGet(HttpServletRequest request, HttpServletResponse                   

response)  throws ServletException, IOException {
    PrintWriter out = response.getWriter();
    response.setContentType("text/html");
    String path = request.getContextPath();
    String ip = request.getRemoteAddr();
    out.print("<html>" +
    "<title>Hello</title>" +
            "Hello World"+ "<br>" +
    "Your ip is: " + ip + "<br>" +
    "Your path is: " + path
    + "</html>");       
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)   

throws     ServletException, IOException {

}

}

I tried removing the mapping from web.xml and it did not work. How do I use this mapping: @WebServlet("/Hello")? — Darbininkai Broliai, Jan 01 '14 at 18:54
@DarbininkaiBroliai You need to declare in your `web.xml` that your application is using Servlet 3.0. — Sotirios Delimanolis, Jan 01 '14 at 18:55
Delimanolis is correct and stick to web.xml few days as you are new. That gives an strong understanding. :) A personal suggestion. — Suresh Atta, Jan 01 '14 at 18:57

score 9 · Accepted Answer · answered Jan 01 '14 at 18:38

The compiled Hello.class file should be in the folder

webapps/ServletTest/WEB-INF/classes/Main

since it's declared to be in package Main.

Also, you can see Tomcat's startup logs in /logs/catalina.out or /logs/catalina.log, depending.

Also, Suresh is right in the comments, use either a <servlet> declaration or @WebServlet. Don't use both.

score 2 · Answer 2 · answered Dec 04 '14 at 21:35

2

Try to delete web.xml. Annotation @WebServlet("/Hello") is enough for Tomcat 7+

answered Dec 04 '14 at 21:35

Max Chernopolsky

617
6
17

You can keep both. Just removing the entry from web.xml and using annotations will do. – Sorter Apr 14 '15 at 08:55

score 1 · Answer 3 · answered Dec 21 '15 at 05:17

1

If the root folder not having proper permission you will face this issue. So please check the root folder property and remove read only permission and add user to full access permission in security tab.

answered Dec 21 '15 at 05:17

Arun Attukal

11
1

This should be comment. – ketan Dec 21 '15 at 05:36
there was perission issue – Ganesh Jogam Jun 04 '16 at 04:32

Getting HTTP Status 404 error when trying to run servlet

3 Answers3

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