entitymanagerfactory spring boot code example

Example 1: spring boot entitymanager example

entityManager.getTransaction().begin();
		entityManager.remove(emp);
		entityManager.getTransaction().commit();

Example 2: spring boot entitymanager example

EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("persistence");
		EntityManager entityManager = entityManagerFactory.createEntityManager();
 
		entityManager.getTransaction().begin();
		Employee employee = new Employee();
		employee.setName("Sanjay");
 
                // Save Entity
		entityManager.persist(employee);
		entityManager.getTransaction().commit();
		System.out.println("Generated Employee ID = " + employee.getEmployeeId());

Example 3: spring boot entitymanager example

package com.frugalis.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 = "EMPLOYEE")
public class Employee {
	private int employeeId;
 
	private String name;
 
	@Id
	@Column(name = "EMPLOYEE_ID")
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	public int getEmployeeId() {
		return employeeId;
	}
 
	public void setEmployeeId(int employeeId) {
		this.employeeId = employeeId;
	}
 
	@Column(name = "EMPLOYEE_NAME")
	public String getName() {
		return name;
	}
 
	public void setName(String name) {
		this.name = name;
	}
 
	@Override
	public String toString() {
		return "Employee [ID=" + employeeId + ", Name=" + name + "]";
	}
 
}

Example 4: spring boot hibernate entitymanager

<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
             http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
	version="2.1">
 
	<persistence-unit name="persistence">
		<description>JPA Entity Manager</description>
		<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
 
		<properties>
			<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
			<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/test" />
			<property name="hibernate.hbm2ddl.auto" value="update" />
			<property name="javax.persistence.jdbc.user" value="root" />
			<property name="javax.persistence.jdbc.password" value="root" />
			<property name="hibernate.show_sql" value="true" />
		</properties>
 
	</persistence-unit>
 
</persistence>