HTTP status 404 - not found java servlet

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the servlet is 

<pre>import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class ServletWriteHtml extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws IOException
{
    PrintWriter out = response.getWriter();
    java.util.Date today = new java.util.Date();
    out.println("html" +
                "<body>" +
                "<h1 align = center>Write Html<h1>"
                + "<br>" + today + "<body>" + "</html>");                        
        }
}

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="file-upload" 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>And</servlet-name>
        <servlet-class>ServletWriteHtml</servlet-class>
    </servlet>  
    <servlet-mapping>
        <servlet-name>ServletWriteHtml</servlet-name>
        <url-pattern>/Alfa</url-pattern>
    </servlet-mapping>
        <welcome-file-list>
            <welcome-file>index.html</welcome-file>
        </welcome-file-list>
</web-app>

compiled the servlet and put at WEB-INF folder

the url of the servlet is

[^]

HTTP Status 404 - Not Found
type Status report
messageNot Found
descriptionThe requested resource is not available.
GlassFish Server Open Source Edition 4.1.1

What I have tried:

ran the application from ide , compiled the servlet and tried the url through web browser

Posted 25-Dec-17 1:30am

four systems

Updated 15-May-19 6:04am

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ThilinaMD 25-Dec-17 10:26am

For glassfish server you have to deploy the application to access the servlets

3 solutions

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ThilinaMD · Answer 1 · 2017-12-26T16:07:00

In your web xml <servlet-name>. value is different in <servlet> tag and <servlet-mapping> tag. So server cannot map to correct servlet. You have to use same servlet-name value for both servlet and servlet-mapping tags

[^Read oracle docs for more info]

<servlet>
    <servlet-name>And</servlet-name>
    <servlet-class>ServletWriteHtml</servlet-class>
</servlet>  
<servlet-mapping>
    <servlet-name>And</servlet-name>
    <url-pattern>/Alfa</url-pattern>
</servlet-mapping>

tip: reply to the comments in reply section and not as an answer.

four systems · Answer 2 · 2017-12-26T02:03:00

Solution 1

the ide is netbeans, glassfish server has been deployed and the application is launched from web console, .class file has been created and is at web-inf directory still the error is 404 not found

Posted 26-Dec-17 2:03am

four systems

four systems · Answer 3 · 2017-12-26T20:02:00

Solution 3

<servlet>
		<servlet-name>And</servlet-name>
		<servlet-class>Javas.ServletWriteHtml</servlet-class>
	</servlet>	
	<servlet-mapping>
		<servlet-name>And</servlet-name>
		<url-pattern>/Alfa</url-pattern>
	</servlet-mapping>

changed the servlet name and added ServletWriteHtml at Javas package still 404 not found

Posted 26-Dec-17 20:02pm

four systems

Comments

ThilinaMD 27-Dec-17 4:52am

create a new servlet using new servelt wizard. Do not click on finish at first. click next and there you can add servlet info to the web.xml (check the check box) then open web xml file and examine the auto generated code about servlet mapping. Again you are posting replies as solutions. please avoid that. It will mislead other readers.

four systems 27-Dec-17 5:55am

that was so good it works now thanks

ThilinaMD 29-Dec-17 0:18am

welcome and happy coding

HTTP status 404 - not found java servlet

3 solutions

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Solution 1

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