Why i am getting a "1 bean exception" [duplicate] - spring

Question

This question already has an answer here:
What is a NoSuchBeanDefinitionException and how do I fix it?
(1 answer)
Closed 2 years ago.
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.home.dao.ProductDao' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
package com.home.dao;
#Repository
#Transactional
#Service
public class ProductDao implements proDaoInterface{
#Autowired
private SessionFactory sessionFactory;
public void addProduct(ProductModel product)
{
Session session= sessionFactory.getCurrentSession();
session.saveOrUpdate(product);
session.flush();
}
public ProductModel getProductByID(String ID)
{
Session session = sessionFactory.getCurrentSession();
ProductModel product = (ProductModel)session.get(ProductModel.class,ID);
session.flush();
return product;
}
#SuppressWarnings("unchecked")
public List<ProductModel> getProductList()
{
Session session= sessionFactory.getCurrentSession();
List<ProductModel> listProduct;
listProduct = session.createQuery("from ProductModel").getResultList();
session.flush();
return listProduct;
}
public void deleteProuct(String ID)
{
Session session = sessionFactory.getCurrentSession();
session.delete(getProductByID(ID));
session.flush();
}
}
controller class
#EnableWebMvc
#Controller
public class homeController {
#Autowired
private ProductDao dao;
#RequestMapping("/test")
public String home(Model model) {
List<ProductModel> productList = dao.getProductList();
model.addAttribute("productList", productList);
return "home";
}
#RequestMapping("/view/{productID}")
public String viewProduct(#PathVariable String productID, Model model) throws IOException {
ProductModel product = dao.getProductByID(productID);
model.addAttribute(product);
return "viewProduct";
}
}
Spring Configuration file
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"
value="oracle.jdbc.driver.OracleDriver"></property>
<property name="url"
value="jdbc:oracle:thin:#localhost:1521:xe"></property>
<property name="username" value="system"></property>
<property name="password" value="admin"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>
<prop key="hbm2ddl.auto">update</prop>
<prop key="dialect">org.hibernate.dialect.OracleDialect</prop>
<prop key="connection.pool_size">1</prop>
<prop key="show_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.home.controllers</value>
<value>com.home.dao</value>
<value>com.home.model</value>
</list>
</property>
</bean>
<bean id="hibernateTransactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
</beans>
Dispatcher -Servlet.xml
<context:component-scan base-package="com.home.controllers"></context:component-scan>
<mvc:annotation-driven/>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
<mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />
<mvc:resources mapping="/images/**" location="/WEB-INF/resources/images/" />
<mvc:resources mapping="/css/**" location="/WEB-INF/resources/css/" />
<mvc:resources mapping="/fonts/**" location="/WEB-INF/resources/fonts/" />
<mvc:resources mapping="/js/**" location="/WEB-INF/resources/js/" />
<mvc:resources mapping="/view/**" location="/view/" />
<tx:annotation-driven />
</beans>
web
<display-name>Product</display-name>
<listener>
<listener-class>
*org.springframework.web.context.ContextLoaderListener*
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/ApplicationConfig.xml,
/WEB-INF/DispatcherServlet.xml
</param-value>
</context-param>
<servlet>
<servlet-name>dad-frontController</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dad-frontController</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

Answer 1

I believe your error is coming in fact you are restricting your component scan on dispatcher-servlet.xml.
Change the following:
<context:component-scan base-package="com.home.controllers"></context:component-scan>
To:
<context:component-scan base-package="com.home.*"></context:component-scan>
Checkout the official doc: https://docs.spring.io/spring/docs/3.0.x/spring-framework-reference/html/beans.html#beans-annotation-config
One more thing, your ProductDao has #Service and #Repository. Both say the same to Spring, so leave only #Repository.
Besides that, I would advise you to use Spring Boot, or, make those configurations via programmatically, it's way more clear =)