spring jpa entitymanager example

Example 1: 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 2: spring boot hibernate entitymanager

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

Example 3: spring boot hibernate entitymanager

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
 
	<groupId>com.frugalis.entity</groupId>
	<artifactId>Entity-Manager-Example</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>
 
	<name>Entity Manager</name>
	<url>http://maven.apache.org</url>
 
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>
 
	<dependencies>
		<!-- MySQL connector -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>6.0.5</version>
		</dependency>
		<!-- Hibernate 5.2.6 Final -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>5.2.6.Final</version>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
 
	<build>
		<sourceDirectory>src/main/java</sourceDirectory>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.5.1</version>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

Example 4: spring boot hibernate entitymanager

// close the entity manager
 entityManager.close();
 entityManagerFactory.close();