I am getting an error while accessing the web page. here is my code -
web.xml file -
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
dispatcher servlet with name - "dispatcher-servlet.xml"
<context:annotation-config />
<context:component-scan base-package="com.webProject.controller"></context:component-scan>
<!-- <context:component-scan base-package="com.webProject">
<context:include-filter type="aspectj" expression="com.webProject.*" />
</context:component-scan>
-->
<bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="mysqlDataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/school" />
<property name="username" value="root" />
<property name="password" value="test" />
</bean>
<bean id="mySessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="mysqlDataSource" />
<property name="annotatedClasses">
<list>
<value>com.webProject.model.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>
<prop key="javax.persistence.validation.mode">none</prop>
<prop key="connection.autocommit">true</prop>
</props>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="mySessionFactory" />
</bean>
<!-- <bean id="studentDao" class="com.webProject.dao.StudentDaoImpl"></bean>-->
</beans>
Student controller class -
package com.webProject.controller;
@Controller
@RequestMapping("/Student")
public class StudentController {
@Autowired
private IStudentDao studentDao;
//List<Student> students;
/*public StudentController() {
students = new ArrayList<Student>();
}*/
public IStudentDao getStudentDao() {
return studentDao;
}
public void setStudentDao(IStudentDao studentDao) {
this.studentDao = studentDao;
}
@RequestMapping(value="details/{number}",method=RequestMethod.GET)
public String studentDetails(@PathVariable("number") int studentNumber, Model model){
//Student student = this.students.get(studentNumber);
Student student = (Student) getStudentDao().load(new Long(studentNumber));
model.addAttribute("student",student);
model.addAttribute("studentNumber", Integer.toString(studentNumber));
return "studentDetails";
}
@RequestMapping(value="addStudent", method=RequestMethod.POST)
public String addStudent(@ModelAttribute("student") Student student, Model model){
if(student != null){
getStudentDao().save(student);
//this.students.add(student);
model.addAttribute("student", student);
model.addAttribute("studentNumber", Integer.toString(getStudentDao().count()));
return "studentAddSuccess";
}else{
throw new NullPointerException();
}
}
@RequestMapping(value="studentRegistration")
public String sendStudentForm(Model model){
Student student = new Student();
model.addAttribute("student", student);
return "studentForm";
}
@RequestMapping(value="delete/{studentNumber}")
public String deleteStudent(@PathVariable("studentNumber") int studentNumber, Model model){
Student student = (Student) getStudentDao().load(new Long(studentNumber));
model.addAttribute("std", student);
getStudentDao().deleteById(new Long(studentNumber));
return "deleteStudent";
}
}
studentform.jsp
<body>
<form:form method="post" modelAttribute="student" action="addStudent">
<table>
<tr>
<td>Student Name</td>
<td>form:input path="studentName"</td>
</tr>
<tr>
<td>Department</td>
<td>form:input path="department"</td>
</tr>
<tr>
<td>College</td>
<td>form:input path="collegeName"</td>
</tr>
<tr>
<td colspan="3"><input type="submit" /></td>
</tr>
</table>
</form:form>
</body>
when i mention - this i get an error as "Resource not found". so i tried including all my packages as-
<context:component-scan base-package="com.webProject.controller"></context:component-scan>
<context:component-scan base-package="com.webProject.dao"></context:component-scan>
<context:component-scan base-package="com.webProject.model"></context:component-scan> but then also i get same "resource not found" error. i tried another way as mentioned in another thread - http://stackoverflow.com/questions/7914363/injection-of-autowired-dependencies-failed
<context:component-scan base-package="com.webProject">
<context:include-filter type="aspectj" expression="com.webProject.*" />
</context:component-scan>
but then also same result - "Resource not found".
so only when i give this base-package="com.webProject.controller", then i dont get "Resource not found error", but then it get another error -
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentController': Injection of autowired dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.webProject.dao.IStudentDao
com.webProject.controller.StudentController.studentDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching
bean of type [com.webProject.dao.IStudentDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.
Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
then i tried to inject the studentDao as , then i also i get an error.
I am using Tomcat to deploy this artifact. and using maven to build this project. i am not sure how it spring+ hibernate+ maven project works in tomcat?
I have recently started programming using spring and hibernate and this is my first project using these technologies. so please pardon me if i am making some basic mistake.
can you please help me with some solution.
student Dao -
package com.webProject.dao;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.HibernateTemplate;
import com.webProject.model.*;
public abstract class AbstractHibernateDAOImpl implements AbstractDao {
@Autowired
private HibernateTemplate hibernateTemplate;
public HibernateTemplate getHibernateTemplate() {
return hibernateTemplate;
}
public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
this.hibernateTemplate = hibernateTemplate;
}
protected Class domainClass = getDomainClass();
/**
* Method to return the class of the domain object
*/
protected abstract Class getDomainClass();
@SuppressWarnings("unchecked")
public PersistentObject load(Long id) {
return (PersistentObject) getHibernateTemplate().load(domainClass, id);
}
public void update(PersistentObject t) {
getHibernateTemplate().update(t);
}
public void save(PersistentObject t) {
getHibernateTemplate().save(t);
}
public void delete(PersistentObject t) {
getHibernateTemplate().delete(t);
}
@SuppressWarnings("unchecked")
public List<PersistentObject> getList() {
return (getHibernateTemplate().find("from " + domainClass.getName()
+ " x"));
}
public void deleteById(Long id) {
Object obj = load(id);
getHibernateTemplate().delete(obj);
}
@SuppressWarnings("unchecked")
public void deleteAll() {
getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException {
String hqlDelete = "delete " + domainClass.getName();
int deletedEntities = session.createQuery(hqlDelete)
.executeUpdate();
return null;
}
});
}
public int count() {
List list = getHibernateTemplate().find(
"select count(*) from " + domainClass.getName() + " x");
Integer count = (Integer) list.get(0);
return count.intValue();
}
}
student dao interface -
package com.webProject.dao;
public interface IStudentDao extends AbstractDao{
}
student dao implementation -
package com.webProject.dao;
import org.springframework.stereotype.Repository;
import com.webProject.model.Student;
@Repository ("studentDao")
public class StudentDaoImpl extends AbstractHibernateDAOImpl implements IStudentDao{
@Override
protected Class getDomainClass() {
return Student.class;
}
}
