java.lang.ClassNotFoundException: com.springhibernatemvc.dao.PersonDAOImpl

Question

I am having an error in my servlet-context.xml. It is saying that it can find the below classes but there actually exist in the projecct folder.

<beans:bean id="personDAO" class="com.springhibernatemvc.dao.PersonDAOImpl">
        <beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
    </beans:bean>
    <beans:bean id="personService" class="com.springbibernate.services.PersonServiceImpl">
        <beans:property name="personDAO" ref="personDAO"></beans:property>
    </beans:bean>

It is saying that this class is not found

- Class 'com.springbibernate.services.PersonServiceImpl'

My servlet-context file is also defined in my web.xml file

<servlet>
        <servlet-name>appServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

I have adding servlet-context.xml to the root folder of my web app but still the error exists.

Complete stacktrace

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0': Invocation of init method failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.springhibernatemvc.dao.PersonDAOImpl] for bean with name 'personDAO' defined in ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml]; nested exception is java.lang.ClassNotFoundException: com.springhibernatemvc.dao.PersonDAOImpl
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.springhibernatemvc.dao.PersonDAOImpl] for bean with name 'personDAO' defined in ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml]; nested exception is java.lang.ClassNotFoundException: com.springhibernatemvc.dao.PersonDAOImpl

What could be wrong?

score 1 · Answer 1 · answered Apr 21 '16 at 19:03

1

from Java Docs

Thrown when an application tries to load in a class through its string name using:

The forName method in class Class.

The findSystemClass method in class ClassLoader .

The loadClass method in class ClassLoader.

but no definition for the class with the specified name could be found.

The problem here is not with the servlet-context.xml but the beans defined in there. make sure that the full cannonical class names are correct and respective class files are present under WEB-INF or some library under that .

From a first high level look it seems that you are defining bean with class as 'com.springbibernate.services.PersonServiceImpl'

where the correct name appears to be 'com.springhibernate.services.PersonServiceImpl'

So the xml content should be like :

<beans:bean id="personDAO" class="com.springhibernatemvc.dao.PersonDAOImpl">
        <beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
    </beans:bean>
    <beans:bean id="personService" class="com.springhibernate.services.PersonServiceImpl">
        <beans:property name="personDAO" ref="personDAO"></beans:property>
    </beans:bean>

answered Apr 21 '16 at 19:03

Akash Yadav

2,411
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The classes are present in WEB-INF folder – Blaze Apr 21 '16 at 19:12
Confirm this is what you are looking for WEB-INF/classes/com/springhibernatemvc/dao/PersonDAOImpl.class and also can you paste the latest error message . – Akash Yadav Apr 21 '16 at 19:19
How can I get this class PersonDAOImpl.class – Blaze Apr 21 '16 at 19:21
It is only defined in the package with .java extension – Blaze Apr 21 '16 at 19:22
This class is generated when you compile you source java classes, and export a war out of the source project . – Akash Yadav Apr 21 '16 at 19:22
So how do I add it because I have done a Maven build but the error still persists – Blaze Apr 21 '16 at 19:25
when you do a maven build on the project, it will generate a war under {Project_folder}/target look for the war and extract that should have packaged your classes correctly, – Akash Yadav Apr 21 '16 at 19:26
I have added complete stack trace – Blaze Apr 21 '16 at 19:38

score 0 · Answer 2 · edited May 23 '17 at 12:09

Make an entry of the below tags in your spring-context xml file:

<context:annotation-config />
<context:component-scan base-package="com.springhibernate.services, com.springhibernatemvc.dao" />

if you are getting the java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener then, follow the below link:

java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

java.lang.ClassNotFoundException: com.springhibernatemvc.dao.PersonDAOImpl

2 Answers2