How to fix java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet Exception – Spring MVC, Tomcat and 404 Error

How to fix HTTP Status 404 Error while running Spring MVC project?

I have been running Spring MVC projects since last ~8 years and created numerous professional and personal project in Java and Spring MVC combination.

On Crunchify we have more than ~50 Spring MVC tutorial for you to use for free. Today while running my old Hello World Spring MVC tutorial I got below error message while starting Tomcat in Eclipse IDE.

Jul 20, 2016 2:12:20 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet [crunchify] in web application [/CrunchifySpringMVCTutorial] threw load() exception
java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1142)
	at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:518)
	at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:499)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1102)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1038)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4997)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5289)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

Why this exception happened:

Most probably the necessary Spring MVC related jar files are not loaded and deployed on tomcat startup. But note: these files are in your classpath and hence you are not getting any error in Eclipse IDE during development time. Happens only during runtime.

How to fix this?

Step-1

• Right click on project
• Click on Properties

Step-2

• Click on Deployment Assembly Tab in the left
• Click Add...

Step-3

Click on Java Build Path Entries

Step-4

• Click on Maven Dependencies
• Click Finish button

Step-5

• Redeploy Spring MVC application to Tomcat again
• Restart Tomcat
• Try accessing URL again and you shouldn’t see any error now

Here is a complete Video Steps just in case you need

The post How to fix java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet Exception – Spring MVC, Tomcat and 404 Error appeared first on Crunchify.

Author: App Shah