Create the Maven project add mysql , hibernate , lombok dependencies as belows in pom.xml
Directory Structure
pom.xml
<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.test</groupId>
<artifactId>TimeStamp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>TimeStamp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.6.8.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.22</version>
</dependency>
</dependencies>
</project>
Address.java
package com.test.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@Entity
@Table(name = "addrtab")
public class Address {
@Id
@Column(name="aid")
private int addrId;
private String loc;
private String pin;
}
*Employee
*
package com.test.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@Entity
@Table(name = "emptab")
public class Employee {
@Id
@Column(name = "eid")
private int empId;
@Column(name = "ename")
private String empName;
@Column(name = "esal")
private double empSal;
@ManyToOne
@JoinColumn(name = "adiFk")//fk column
private Address addr;
}
HibernateUtil.java
package com.test.util;
import java.util.Properties;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import com.test.entity.Address;
import com.test.entity.Employee;
public class HibernateUtil {
static SessionFactory factory = null;
static {
Configuration cfg = new Configuration();
Properties props = new Properties();
props.put(Environment.URL, "jdbc:mysql://localhost:3306/new");
props.put(Environment.USER, "root");
props.put(Environment.PASS, "root");
props.put(Environment.SHOW_SQL, true);
props.put(Environment.FORMAT_SQL, true);
props.put(Environment.HBM2DDL_AUTO, "update");
cfg.setProperties(props);
cfg.addAnnotatedClass(Employee.class);
cfg.addAnnotatedClass(Address.class);
factory = cfg.buildSessionFactory();
}
public static SessionFactory getSessionFactory() {
return factory;
}
public static Session getSession() {
return factory.openSession();
}
}
Test.java
package com.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.test.entity.Address;
import com.test.entity.Employee;
import com.test.util.HibernateUtil;
public class Test {
public static void main(String[] args) {
Transaction tx = null;
//get the SessionFactory
SessionFactory factory = HibernateUtil.getSessionFactory();
//get the Session
Session ses = HibernateUtil.getSession();
try(factory;ses){
//begin the tx
tx = ses.beginTransaction();
Address addr = new Address();
addr.setAddrId(101);
addr.setLoc("pune");
addr.setPin("431605");
//emp objects
Employee e1 = new Employee();
e1.setEmpId(1);
e1.setEmpName("Sam");
e1.setEmpSal(4000.0);
e1.setAddr(addr);
Employee e2 = new Employee();
e2.setEmpId(2);
e2.setEmpName("Jhon");
e2.setEmpSal(5000.0);
e2.setAddr(addr);
Employee e3 = new Employee();
e3.setEmpId(3);
e3.setEmpName("Brock");
e3.setEmpSal(6000.0);
e3.setAddr(addr);
ses.save(addr);
ses.save(e1);
ses.save(e2);
ses.save(e3);
//commit the tx
tx.commit();
}catch(Exception e) {
e.printStackTrace();
}
}
}
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