I am trying to run a simple program for inputting a number in a form and displaying it using servlet.
This is the file structure of a simple Servlet program using TomCat10.0
web.xml which connects the 2 files
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4" >
<servlet>
<servlet-name>com.one.first</servlet-name>
<servlet-class>com.one.first</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>com.one.first</servlet-name>
<url-pattern>/first</url-pattern>
</servlet-mapping>
</web-app>
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="first">
<input type="text" name="num1" /><br>
<input type="Submit"/><br>
</form>
</body>
</html>
first.java
package com.one;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class first extends HttpServlet{
public void service(HttpServletRequest req, HttpServletResponse resp) {
int i = Integer.parseInt(req.getParameter("num1"));
System.out.println("Result is:" + i);
}
}
Error While I submit the index.html form
INFO: Server startup in [808] milliseconds
Aug 29, 2021 4:14:06 PM org.apache.catalina.core.ApplicationContext log
INFO: Marking servlet [one] as unavailable
Aug 29, 2021 4:14:06 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet [one]
java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet
