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Spring ORM – Update Project ”; Previous Next Let”s add the following classes in the project in the relevant packages. Employee class to be persisted in database. Employee.java package com.tutorialspoint.jpa.entity; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name = “Employees”) public class Employee { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private int id; @Column(name = “NAME”) private String name; @Column(name = “SALARY”) private double salary; @Column(name = “DESIGNATION”) private String designation; public Employee( ) { } public Employee(String name, double salary, String designation) { this.name = name; this.salary = salary; this.designation = designation; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public double getSalary() { return salary; } public void setSalary(double salary) { this.salary = salary; } public String getDesignation() { return designation; } public void setDesignation(String designation) { this.designation = designation; } } Employee DAO class to do operations on database. EmployeeDao.java package com.tutorialspoint.jpa.dao; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Root; import org.springframework.stereotype.Repository; import com.tutorialspoint.jpa.entity.Employee; @Repository public class EmployeeDao { @PersistenceContext private EntityManager em; public void add(Employee employee) { em.persist(employee); } public List<Employee> listEmployees() { CriteriaQuery<Employee> criteriaQuery = em.getCriteriaBuilder().createQuery(Employee.class); @SuppressWarnings(“unused”) Root<Employee> root = criteriaQuery.from(Employee.class); return em.createQuery(criteriaQuery).getResultList(); } } Employee Service class to use Employee DAO class. EmployeeService.java package com.tutorialspoint.jpa.service; import java.util.List; import javax.transaction.Transactional; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.tutorialspoint.jpa.dao.EmployeeDao; import com.tutorialspoint.jpa.entity.Employee; @Service public class EmployeeService { @Autowired private EmployeeDao employeeDao; @Transactional public void add(Employee employee) { employeeDao.add(employee); } @Transactional() public List<Employee> listEmployees() { return employeeDao.listEmployees(); } } Application Configuration to be used by Spring framework. AppConfig.java package com.tutorialspoint.jpa; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.ComponentScans; import org.springframework.context.annotation.Configuration; import org.springframework.orm.jpa.JpaTransactionManager; import org.springframework.orm.jpa.LocalEntityManagerFactoryBean; import org.springframework.transaction.annotation.EnableTransactionManagement; @Configuration @EnableTransactionManagement @ComponentScans(value = { @ComponentScan(“com.tutorialspoint.jpa.dao”), @ComponentScan(“com.tutorialspoint.jpa.service”) }) public class AppConfig { @Bean public LocalEntityManagerFactoryBean geEntityManagerFactoryBean() { LocalEntityManagerFactoryBean factoryBean = new LocalEntityManagerFactoryBean(); factoryBean.setPersistenceUnitName(“Hibernate_JPA”); return factoryBean; } @Bean public JpaTransactionManager geJpaTransactionManager() { JpaTransactionManager transactionManager = new JpaTransactionManager(); transactionManager.setEntityManagerFactory(geEntityManagerFactoryBean().getObject()); return transactionManager; } } Main Application to run and test the functionalities. MainApp.java package com.tutorialspoint.jpa; import java.sql.SQLException; import java.util.List; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import com.tutorialspoint.jpa.entity.Employee; import com.tutorialspoint.jpa.service.EmployeeService; public class MainApp { public static void main(String[] args) throws SQLException { AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class); EmployeeService employeeService = context.getBean(EmployeeService.class); employeeService.add(new Employee(“Julie”, 10000, “Technical Manager”)); employeeService.add(new Employee(“Robert”, 20000, “Senior Manager”)); employeeService.add(new Employee(“Anil”, 5000, “Software Engineer”)); // Get Persons List<Employee> employees = employeeService.listEmployees(); for (Employee employee : employees) { System.out.println(“Id : “+employee.getId()); System.out.println(“Name : “+employee.getName()); System.out.println(“Salary = “+employee.getSalary()); System.out.println(“Designation = “+employee.getDesignation()); System.out.println(); } context.close(); } } Print Page Previous Next Advertisements ”;