'javax.servlet.ServletException: Error instantiating servlet class org.springframework.web.servlet.DispatcherServlet

Here the directory hierarchy

The errors

I am learning Spring MVC and I am following a tutorial on Youtube:https://www.youtube.com/watch?v=g2b-NbR48Jo&ab_channel=Telusko.I wanted to display a page that can multiply 2 numbers and return the result. Before that, I just want to print something to see whether these is an error. I have done exactly same as the tutorial but I still got the errors. I have been searching for the solution for many hours yet I can't find a way to solve my problem.

I am using Eclipse IDE ,apache tomcat 8.0

Here the web.xml

 <!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  
  <servlet>

      <servlet-name>viktor</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>


  </servlet>

  <servlet-mapping>

    <servlet-name>viktor</servlet-name>
    <url-pattern>/</url-pattern>

  </servlet-mapping>

</web-app>

index.jsp

<html>
<body>

<form action="multiply">
   <input type="text" name="n1"><br>
   <input type="text" name="n2"><br>
   <input type="submit">
</form>

</body>
</html>

viktor-servlet.xml

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


<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:ctx="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
">

<ctx:annotation-config></ctx:annotation-config>
<ctx:component-scan base-package="com.viktor"></ctx:component-scan>
</beans>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.viktor</groupId>
  <artifactId>DemoMVC</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>DemoMVC Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
    
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.8.RELEASE</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.8.RELEASE</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.36</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
    
  </dependencies>
  <build>
    <finalName>DemoMVC</finalName>
  </build>
</project>

MultiplyController.java

package com.viktor;

import org.springframework.stereotype.Controller
import org.springframework.web.bind.annotation.RequestMapping

@Controller
public class MultiplyController {
    
    @RequestMapping("/multiply")
    public String cnm() {
        
        //System.out.println("adsasd");
        return "display.jsp";
    }

}

display.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
  im here
</body>
</html>
javaspringservlets


Solution 1:[1]

Add this dependency in pom.xml

<dependency>
     <groupId>org.slf4j</groupId>
     <artifactId>jcl-over-slf4j</artifactId>
</dependency>

After adding slf4j if the problem is not resolved, then add Maven Dependency in Deployment Assembly.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Ayush Yadav

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