but in getAllStudents() they are throwing error


spring config file:

<?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:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- Add support for component scanning -->
    <context:component-scan base-package="com.srinivas" />

    <!-- Add support for conversion, formatting and validation support -->
    <mvc:annotation-driven />

    <!-- Define Spring MVC view resolver -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <bean id="myDataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url"
            value="jdbc:mysql://localhost:3306/hb_student_tracker" />
        <property name="username" value="hbstudent" />
        <property name="password" value="hbstudent" />
    </bean>

    <bean id="mySessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <property name="dataSource" ref="myDataSource" />
        <property name="annotatedClasses">
            <list>
                <value>com.srinivas.entity.Student</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <!--  <prop key="hibernate.hbm2ddl.auto">create</prop> -->
            </props>
        </property>
    </bean>


    <bean id="template" class="org.springframework.orm.hibernate5.HibernateTemplate">
        <property name="sessionFactory" ref="mySessionFactory"></property>
    </bean>

    <bean id="studentDAOImpl" class="com.srinivas.DAO.StudentDAOImpl">
        <property name="hibernateTemplate" ref="template" />
    </bean>
</beans>

StudentDaoImpl class:

{

    private HibernateTemplate hibernateTemplate;

    public void setHibernateTemplate(HibernateTemplate hibernate) {

        this.hibernateTemplate = hibernate;

        //hibernateTemplate.clear();
        List<Student> students = new ArrayList<>();
        students = hibernateTemplate.loadAll(Student.class);
        for(Student s:students) {

            System.out.println(s);
        }
        System.out.println(this.hibernateTemplate);
    }

    @Override
    public List<Student> getAllStudents() {
        // TODO Auto-generated method stub

        List<Student> students = new ArrayList<>();
        //hibernateTemplate.clear();

        students = hibernateTemplate.loadAll(Student.class);

        for(Student s:students) {

            System.out.println(s);
        }
        return students;
    }

    @Override
    public Student getStudent(int id) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void updateStudent(Student student) {
        // TODO Auto-generated method stub

    }

    @Override
    public void deleteStudent(Student student) {
        // TODO Auto-generated method stub

    }

}






hibernateTemplate methods are working fine in setHibernateTemplate() setter method

but in getAllStudents() they are throwing error

Excepiion stacktrace :

Apr 16, 2017 12:56:37 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:RigProject' did not find a matching property.
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server version:        Apache Tomcat/8.0.35
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server built:          May 11 2016 21:57:08 UTC
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server number:         8.0.35.0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Name:               Windows 10
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Version:            10.0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Architecture:          amd64
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Java Home:             C:Program FilesJavajre1.8.0_91
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Version:           1.8.0_91-b15
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Vendor:            Oracle Corporation
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_BASE:         G:springhb.metadata.pluginsorg.eclipse.wst.server.coretmp0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_HOME:         C:Program FilesApache Software FoundationTomcat 8.0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.base=G:springhb.metadata.pluginsorg.eclipse.wst.server.coretmp0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.home=C:Program FilesApache Software FoundationTomcat 8.0
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dwtp.deploy=G:springhb.metadata.pluginsorg.eclipse.wst.server.coretmp0wtpwebapps
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.endorsed.dirs=C:Program FilesApache Software FoundationTomcat 8.0endorsed
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dfile.encoding=Cp1252
Apr 16, 2017 12:56:37 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:Program FilesJavajre1.8.0_91bin;C:WINDOWSSunJavabin;C:WINDOWSsystem32;C:WINDOWS;C:/Program Files/Java/jre1.8.0_91/bin/server;C:/Program Files/Java/jre1.8.0_91/bin;C:/Program Files/Java/jre1.8.0_91/lib/amd64;C:ProgramDataOracleJavajavapath;c:MinGWbin;c:MinGWlibexecgccx86_64-pc-mingw326.2.0;C:Userssrinivasgccbin;C:Userssrinivasgcclibexecgccx86_64-pc-mingw326.2.0;C:appsrinivasproduct11.2.0dbhome_1bin;C:Program FilesJavajdk1.7.0_05bin;C:Program Files (x86)MySQLMySQL Fabric 1.5 & MySQL Utilities 1.5;C:Program Files (x86)MySQLMySQL Fabric 1.5 & MySQL Utilities 1.5Doctrine extensions for PHP;C:Program Files (x86)Windows Kits8.1Windows Performance Toolkit;C:Program FilesMicrosoft SQL Server110ToolsBinn;C:WINDOWSsystem32;C:WINDOWS;C:WINDOWSSystem32Wbem;C:WINDOWSSystem32WindowsPowerShellv1.0;C:Program Filesnodejs;C:WindowsSystem32cmd.exe;C:Program FilesJavajdk1.8.0_91bin;C:Program FilesRR-3.2.2bin;C:UserssrinivasAppDataLocalMicrosoftWindowsApps;C:UserssrinivasAppDataRoamingnpm;C:apache-maven-3.3.9bin;C:UserssrinivasDesktop;;.
Apr 16, 2017 12:56:37 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-9000"]
Apr 16, 2017 12:56:37 AM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Apr 16, 2017 12:56:37 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-nio-8009"]
Apr 16, 2017 12:56:37 AM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
Apr 16, 2017 12:56:37 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1027 ms
Apr 16, 2017 12:56:37 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Apr 16, 2017 12:56:37 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.0.35
Apr 16, 2017 12:56:37 AM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom
INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [122] milliseconds.
Apr 16, 2017 12:56:40 AM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Apr 16, 2017 12:56:40 AM org.apache.catalina.core.ApplicationContext log
INFO: No Spring WebApplicationInitializer types detected on classpath
Apr 16, 2017 12:56:40 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'dispatcher'
Apr 16, 2017 12:56:40 AM org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'dispatcher': initialization started
Apr 16, 2017 12:56:40 AM org.springframework.web.context.support.XmlWebApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'dispatcher-servlet': startup date [Sun Apr 16 00:56:40 IST 2017]; root of context hierarchy
Apr 16, 2017 12:56:41 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/spring-mvc-crud-demo-servlet.xml]
Apr 16, 2017 12:56:42 AM org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor <init>
INFO: JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
Apr 16, 2017 12:56:42 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping register
INFO: Mapped "{[/hello]}" onto public java.lang.String com.srinivas.controller.RigController.HelloRig()
Apr 16, 2017 12:56:42 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'dispatcher-servlet': startup date [Sun Apr 16 00:56:40 IST 2017]; root of context hierarchy
Apr 16, 2017 12:56:42 AM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
INFO: Looking for @ControllerAdvice: WebApplicationContext for namespace 'dispatcher-servlet': startup date [Sun Apr 16 00:56:40 IST 2017]; root of context hierarchy
Apr 16, 2017 12:56:43 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.1.Final}
Apr 16, 2017 12:56:43 AM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Apr 16, 2017 12:56:43 AM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Apr 16, 2017 12:56:43 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
Sun Apr 16 00:56:43 IST 2017 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Sun Apr 16 00:56:43 IST 2017 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
Apr 16, 2017 12:56:43 AM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
Apr 16, 2017 12:56:45 AM org.hibernate.internal.SessionImpl createCriteria
WARN: HHH90000022: Hibernate's legacy org.hibernate.Criteria API is deprecated; use the JPA javax.persistence.criteria.CriteriaQuery instead
Hibernate: select this_.id as id1_0_0_, this_.gender as gender2_0_0_, this_.hobies as hobies3_0_0_, this_.language as language4_0_0_, this_.name as name5_0_0_ from student this_
Student [id=1, name=Srinivas, gender=m, language=Telugu, hobies=cricket]
Student [id=2, name=ABC, gender=m, language=Engilish, hobies=cricket]
org.springframework.orm.hibernate5.HibernateTemplate@3c940b65
Apr 16, 2017 12:56:45 AM org.springframework.web.servlet.DispatcherServlet initServletBean
INFO: FrameworkServlet 'dispatcher': initialization completed in 4442 ms
Apr 16, 2017 12:56:45 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-nio-9000"]
Apr 16, 2017 12:56:45 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-nio-8009"]
Apr 16, 2017 12:56:45 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 7949 ms
before gas
Apr 16, 2017 12:56:48 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/RigProject] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
    at com.srinivas.DAO.StudentDAOImpl.getAllStudents(StudentDAOImpl.java:37)
    at com.srinivas.controller.RigController.HelloRig(RigController.java:17)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    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:1099)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)