org.hibernate.AnnotationException: #OneToOne or #ManyToOne on ........ references unknown entity: - mysql

Question

I am new to Spring-Hibernate technology facing issue while integrating Spring MVC with Hibernate for relationship of two classes. Below are the code:
The User class:
package com.MVCHibernate.Model;
import java.util.List;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
#Entity
#Table(name = "EMP_USERS")
public class UserModel {
#Id
#GeneratedValue
private int id;
private String username;
private String password;
private String role;
#OneToMany(mappedBy="emp_users")
private List<PermanentEmployeeModel> permanentEmployeeModel;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public List<PermanentEmployeeModel> getPermanentEmployeeModel() {
return permanentEmployeeModel;
}
public void setPermanentEmployeeModel(List<PermanentEmployeeModel> permanentEmployeeModel) {
this.permanentEmployeeModel = permanentEmployeeModel;
}
}
The PermanentEmployeeModel class:
package com.MVCHibernate.Model;
import javax.persistence.*;
#Entity
#Table(name = "EMP_PERMANENT")
public class PermanentEmployeeModel{
#Id
#GeneratedValue
private int eid;
private int fname;
private int lname;
private int salary;
private String grade;
private int date;
// ManyToOne relationship
#ManyToOne
#JoinColumn(name = "id")
private UserModel emp_user;
public int getEid() {
return eid;
}
public void setEid(int eid) {
this.eid = eid;
}
public int getFname() {
return fname;
}
public void setFname(int fname) {
this.fname = fname;
}
public int getLname() {
return lname;
}
public void setLname(int lname) {
this.lname = lname;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
public String getGrade() {
return grade;
}
public void setGrade(String grade) {
this.grade = grade;
}
public int getDate() {
return date;
}
public void setDate(int date) {
this.date = date;
}
public UserModel getEmp_user() {
return emp_user;
}
public void setEmp_user(UserModel emp_user) {
this.emp_user = emp_user;
}
}
employee-servlet.xml:
<context:component-scan base-package="com.MVCHibernate" />
<mvc:annotation-driven />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/Files/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/EmployeeMVCHibernate" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.MVCHibernate.Model.UserModel</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>
<!-- PERMANENT EMPLOYEE -->
<bean id="sessionFactory1"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.MVCHibernate.Model.PermanentEmployeeModel</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="txManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- USER BEANS -->
<!-- <bean id="userDAOImpl" class="com.MVCHibernate.DAO.UserDAOImpl" /> -->
<bean id="userDAOImpl" class="com.MVCHibernate.DAO.UserDAOImpl">
<property name="sessionFactory" ref = "sessionFactory"></property>
</bean>
<bean id="userServiceImpl" class="com.MVCHibernate.Service.UserServiceImpl" />
<!-- EMPLOYEE BEANS -->
<!-- <bean id="pempDAOImpl" class="com.MVCHibernate.DAO.PermanentEmployeeDAOImpl" /> -->
<bean id="pempDAOImpl" class="com.MVCHibernate.DAO.PermanentEmployeeDAOImpl">
<property name="sessionFactory" ref = "sessionFactory1"></property>
</bean>
<bean id="pempServiceImpl" class="com.MVCHibernate.Service.PermanentEmployeeServiceImpl" />
While executing the code it shows the following error :
org.hibernate.AnnotationException: #OneToOne or #ManyToOne on ........
references unknown entity:......
No other solutions on stackoverflow worked for me so far.
Any idea whoat am i doing wrong?

Answer 1

This is working now.
Need to include the mapping resource into the employee-servlet.xml file
**<import resource="classpath*:hibernate.cfg.xml"/>**
hibernate.cfg.xml:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<mapping class="com.MVCHibernate.Model.UserModel"></mapping>
<mapping class="com.MVCHibernate.Model.PermanentEmployeeModel"></mapping>
</session-factory>
</hibernate-configuration>