Unable to find class: Java.lang.ClassNotFoundException:com.tt.javaweb.HttpServletRequest Problem Resolution

The problem is as follows:

Critical: Allocate exception for servlet LoginServlet3

java.lang.ClassNotFoundException:HttpServletRequest
At Org.apache.catalina.loader.WebappClassLoaderBase.loadClass (webappclassloaderbase.java:1333)
At Org.apache.catalina.loader.WebappClassLoaderBase.loadClass (webappclassloaderbase.java:1167)
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:1091)
At org.apache.catalina.core.StandardWrapper.allocate (standardwrapper.java:817)
At Org.apache.catalina.core.StandardWrapperValve.invoke (standardwrappervalve.java:135)
At Org.apache.catalina.core.StandardContextValve.invoke (standardcontextvalve.java:106)
At Org.apache.catalina.authenticator.AuthenticatorBase.invoke (authenticatorbase.java:502)
At Org.apache.catalina.core.StandardHostValve.invoke (standardhostvalve.java:141)
At Org.apache.catalina.valves.ErrorReportValve.invoke (errorreportvalve.java:79)
At Org.apache.catalina.valves.AbstractAccessLogValve.invoke (abstractaccesslogvalve.java:616)
At Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:88)
At Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:528)
At org.apache.coyote.http11.AbstractHttp11Processor.process (abstracthttp11processor.java:1100)
At org.apache.coyote.abstractprotocol$abstractconnectionhandler.process (abstractprotocol.java:687)
At Org.apache.tomcat.util.net.aprendpoint$socketprocessor.dorun (aprendpoint.java:2508)
At Org.apache.tomcat.util.net.aprendpoint$socketprocessor.run (aprendpoint.java:2497)
At Java.util.concurrent.ThreadPoolExecutor.runWorker (threadpoolexecutor.java:1142)
At Java.util.concurrent.threadpoolexecutor$worker.run (threadpoolexecutor.java:617)
At Org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run (taskthread.java:61)
At Java.lang.Thread.run (thread.java:745)

Resolution: The HttpServlet corresponding class was not found because of a lack of httpservlet jar packages. Go to Tomcat's Lib directory to find Servlet-api.jar, put it in the path web-inf/lib inside the line.

Unable to find class: Java.lang.ClassNotFoundException:com.tt.javaweb.HttpServletRequest Problem Resolution