Spring Hibernate get tuple by id - spring

Question

I am trying to create a simple "teacher" database. I was able to create a method for adding a new teacher to database, now I need to be able to get one and delete one by "Id". I would like some help, of how should I implement it. I have added following code files: AppConfig, Teacher (entity class), ITeacherDao (interface), TeacherDao(implementation of interface) and class with main method TimeStarApplication.
AppConfig
package com.superum.timestar;
import javax.sql.DataSource;
import org.apache.commons.dbcp.BasicDataSource;
import org.hibernate.SessionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.hibernate4.HibernateTemplate;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBuilder;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import com.superum.timestar.dao.ITeacherDao;
import com.superum.timestar.dao.TeacherDao;
import com.superum.timestar.entity.Teacher;
#Configuration
#EnableTransactionManagement
public class AppConfig {
#Bean
public ITeacherDao teacherDao() {
return new TeacherDao();
}
#Bean
public HibernateTemplate hibernateTemplate() {
return new HibernateTemplate(sessionFactory());
}
#Bean
public SessionFactory sessionFactory() {
return new LocalSessionFactoryBuilder(getDataSource())
.addAnnotatedClasses(Teacher.class)
.buildSessionFactory();
}
#Bean
public DataSource getDataSource() {
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/time_star");
dataSource.setUsername("root");
dataSource.setPassword("password");
return dataSource;
}
#Bean
public HibernateTransactionManager hibTransMan(){
return new HibernateTransactionManager(sessionFactory());
}
}
Teacher
package com.superum.timestar.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="teachers")
public class Teacher {
#Id#GeneratedValue
#Column(name="t_id")
private int Id;
#Column(name="t_name")
private String name;
#Column(name="t_lastname")
private String lastname;
#Column(name="t_phone")
private String phone;
#Column(name="t_age")
private int age;
public int getId() {
return Id;
}
public void setId(int id) {
Id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
ITeacherDAO
package com.superum.timestar.dao;
public interface ITeacherDao {
public void addTeacher(String name, String lastname, String phone, int age);
// public void getTeacher(int id);
`` // public void deleteTeacher();
}
TeacherDao
package com.superum.timestar.dao;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate4.HibernateTemplate;
import com.superum.timestar.entity.Teacher;
#Transactional
public class TeacherDao implements ITeacherDao{
#Autowired
private HibernateTemplate hibernateTemplate;
public void addTeacher(String name, String lastname, String phone, int age){
Teacher teacher = new Teacher();
teacher.setName(name);
teacher.setLastname(lastname);
teacher.setPhone(phone);
teacher.setAge(age);
hibernateTemplate.save(teacher);
}
// I need to create get by Id
// public void getTeacher(int Id){
//
// }
I hope the question is not entirely horrible.
}

Answer 1

ITeacherDAO
package com.superum.timestar.dao;
public interface ITeacherDao {
public void addTeacher(String name, String lastname, String phone, int age);
public Teacher getTeacher(int id); //Method to get the teacher by id
public void deleteTeacher(int id); //Method to delete the teacher by id
}
TeacherDao
package com.superum.timestar.dao;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate4.HibernateTemplate;
import com.superum.timestar.entity.Teacher;
#Transactional
public class TeacherDao implements ITeacherDao{
#Autowired
private HibernateTemplate hibernateTemplate;
public void addTeacher(String name, String lastname, String phone, int age){
Teacher teacher = new Teacher();
teacher.setName(name);
teacher.setLastname(lastname);
teacher.setPhone(phone);
teacher.setAge(age);
hibernateTemplate.save(teacher);
}
public Teacher getTeacher(int id){
Teacher teacher = (Teacher)hibernateTemplate.get(Teacher.class, id);
return teacher;
}
public void deleteTeacher(int id){
Teacher teacher = (Teacher)hibernateTemplate.get(Teacher.class, id);
hibernateTemplate.delete(teacher);
}