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I am creating a sample website for College last time when i ran the code it was running fine but when i ran it after some time I got this Error
"HTTP Status 500 - Servlet.init() for servlet spring-dispatcher threw exception"

Error Messages -

type Exception report

message Servlet.init() for servlet spring-dispatcher threw exception

description The server encountered an internal error that prevented it
from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet
spring-dispatcher threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

java.lang.Thread.run(Thread.java:748)

Following are the classes which i am working on

spring-dispatcher-servlet.xml -

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:mvc="http://www.springframework.org/schema/mvc"
 xsi:schemaLocation="http://www.springframework.org/schema/beans 
 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-3.0.xsd
 http://www.springframework.org/schema/mvc 
 http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">


 <context:component-scan base-package="com.newseries.hecontroller" />
 <mvc:annotation-driven/> 

 <bean id="viewResolver"
 class="org.springframework.web.servlet.view.InternalResourceViewResolver">
 <property name="prefix">
 <value>/WEB-INF/</value>
 </property>
 <property name="suffix">
 <value>.jsp</value>
 </property>
 </bean>

</beans>

studentAdmissionController -

package com.newseries.hecontroller;

import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Map;
import java.text.DateFormat;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class studentAdmissionController 

 @InitBinder
 public void initBinder(WebDataBinder binder) 
 //binder.setDisallowedFields(new String[] "mobileNumber");
 SimpleDateFormat sdf = new SimpleDateFormat("yyyy****MM**dd");
 binder.registerCustomEditor(Date.class, "newDate", new CustomDateEditor(sdf, false));
 //binder.registerCustomEditor(String.class, "firstName", new StudentNameEditor());
 

 @RequestMapping(value="/admissionForm.html", method = RequestMethod.GET)
 public ModelAndView getAdmissionForm() 
 ModelAndView model = new ModelAndView("AdmissionForm");
 return model;
 

 @ModelAttribute
 public void addcommonmethod(Model model) 
 model.addAttribute("headermessage", "SIT college of Engineering India");
 

 @RequestMapping(value="/submitAdmissionForm.html", method = RequestMethod.POST)
 public ModelAndView submitAdmissionForm(@ModelAttribute("student1") Student student1, BindingResult result) 

 if(result.hasErrors()) 
 ModelAndView model1 = new ModelAndView("AdmissionForm");
 return model1;
 

 ModelAndView model = new ModelAndView("AdmissionSuccess");
 return model;
 

AdmissionForm.jsp -

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<html>
<body>
 <h1>$headermessage</h1>
 <h2>College Admission Courses</h2>

 <form:errors path="student1.*"/>

 <form action="/FirstSpringMVCApplication02/submitAdmissionForm.html"
 method="post">
<table>
<tr> <td>Student's FirstName : </td> <td> <input type="text" name="firstName" /> </td> </tr>
<tr> <td>Student's LastName : </td> <td> <input type="text" name="lastName" /> </td> </tr>
<tr> <td>Student's Hobby : </td> <td> <input type="text" name="studentHobby" /> </td> </tr>
<tr> <td>Student's MobileNumber : </td> <td> <input type="text" name="mobileNumber" /> </td> </tr>
<tr> <td>Student DOB : </td> <td> <input type="text" name="newDate" /> </td> </tr>
<tr> <td>Student skillSet : </td> <td> <select name="studentSkills" multiple>
 <option value="CoreJava">Core Java</option>
 <option value="SpringMVC">SpringMVC</option>
 <option value="SpringIOC">SpringIOC</option>
 <option value="SpringAOP">SpringAOP</option>
 <option value="SpringDAO">SpringDAO</option>
 <option value="SpringBoot">SpringBoot</option>
 <option value="Multithreading">Multithreading</option>
 <option value="Collection">Collection</option>
 <option value="Oops">Oops</option>
 <option value="Hibernate">Hibernate</option> 
 </select></td> </tr>
</table>
 <table>
 <tr>
 <td>Student's Address :</td>
 </tr>

 <tr>
 <td>Country: <input type="text" name="studentAddress.country" /></td>
 <td>City : <input type="text" name="studentAddress.city" /></td>
 <td>Street : <input type="text" name="studentAddress.city" /></td>
 <td>pinCode: <input type="text" name="studentAddress.pinCode" /></td>
 </tr>

 </table>

 <input type="submit" value="Submit" />
 </form>

</body>
</html>

web.xml -

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
 <display-name>FirstSpringMVCApplication02</display-name>

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

 <servlet-mapping>
 <servlet-name>spring-dispatcher</servlet-name>
 <url-pattern>/</url-pattern>
 </servlet-mapping>
</web-app>

AdmisssionSuccess.jsp -

<html>
<body>

 <h1>$headermessage</h1>

 <h2>Congrats!! The Engineering college has processed the
 application Successfully</h2>

 <h3>Details submitted by you are: :</h3>

 <table>

 <tr>
 <td>Student_FirstName : </td>
 <td>$student1.firstName</td>
 </tr>

 <tr>
 <td>Student_LastName : </td>
 <td>$student1.lastName</td>
 </tr>

 <tr>
 <td>Students_Hobby : </td>
 <td>$student1.studentHobby</td>
 </tr>

 <tr>
 <td>Student's_MobileNumber : </td>
 <td>$student1.mobileNumber</td>
 </tr>

 <tr>
 <td>Student's_DOB : </td>
 <td>$student1.newDate</td>
 </tr>

 <tr>
 <td>Student's_skills : </td>
 <td>$student1.studentSkills</td>
 </tr>

 <tr>
 <td>Student's Address : </td>
 <td>country : $student1.studentAddress.country
 city : $student1.studentAddress.city
 street : $student1.studentAddress.street
 pincode : $student1.studentAddress.pinCode</td>
 </tr>


 </table>


</body>
</html>

add this param into web.xml file

<context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>/WEB-INF/spring-dispatcher-servlet.xml</param-value>
</context-param>