Nearby lessons

7 of 19

Hibernate - MySQL Integration Hibernate - Struts Integration Hibernate - Configuration Hibernate - Composite Keys Hibernate - Schema Generation

Hibernate - Configuration Approaches

📌 What You Will Learn

Understand Hibernate - Configuration Approaches
See working code examples
Learn from common mistakes and Q&A

Learn Hibernate - Configuration Approaches step by step — simple explanations, complete programs with their output, common beginner mistakes, and exam-style MCQs.

ANS

Yes, it is possible to run Hibernate applications without using configuration file.

In Hibernate Applications, we are able to provide configuration details in the following two

approaches.

ANS

a) By using properties file

b) By Using XML file

Example02

JCode Cell

1
2	Programmatic Approach
3	Declarative Approach
4

ANS

In Programmatic approach, to provide configuration details, first we have to create Configuration

class object then we have to set all hibernate properties to Configuration class object explicitly by

using the following method.

public void setProperty(String prop_Name, String prop_Val)

To add mapping file name and location to Configuration file we have to use the following method.

public void addResource(String mapping_File_Name)

Note: If we are using annotations in place of mapping file then we have to use the following

method to add annotated class.

public void addAnnotatedClass(Class class)

Example on without configuration File and with mapping file in Programmatic Approach:

Employee.java

Example03

JCode Cell

1
2	Programmatic Approach
3

ANS

Example04

JCode Cell

1
2	package com.durgasoft.hbn.pojo;
3

ANS

Example05

JCode Cell

1
2	public class Employee {
3	private int eno;
4	private String ename;
5	private float esal;
6	private String eaddr;
7

ANS

Example06

JCode Cell

1
2	public int getEno() {
3	return eno;
4	}
5	public void setEno(int eno) {
6	this.eno = eno;
7	}
8	public String getEname() {
9	return ename;
10	}
11	public void setEname(String ename) {
12	this.ename = ename;
13	}
14	public float getEsal() {
15	return esal;
16	}
17	public void setEsal(float esal) {
18	this.esal = esal;
19	}
20	public String getEaddr() {
21	return eaddr;
22	}
23	public void setEaddr(String eaddr) {
24	this.eaddr = eaddr;
25	}
26

ANS

Employee.hbm.xml

Example07

JCode Cell

1
2	}
3

ANS

ClientApp.java

Example08

JCode Cell

1
2	<?xml version="1.0" encoding="UTF-8"?>
3	<!DOCTYPE hibernate-mapping PUBLIC
4	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
5	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
6	<hibernate-mapping>
7	<class name="com.durgasoft.hbn.pojo.Employee" table="emp1">
8	<id name="eno" column="ENO"/>
9	<property name="ename" column="ENAME"/>
10	<property name="esal" column="ESAL"/>
11	<property name="eaddr" column="EADDR"/>
12	</class>
13	</hibernate-mapping>
14

ANS

Example09

JCode Cell

1
2	package com.durgasoft.hbn.test;
3

ANS

Example10

JCode Cell

1
2	import org.hibernate.Session;
3	import org.hibernate.SessionFactory;
4	import org.hibernate.cfg.AnnotationConfiguration;
5	import org.hibernate.cfg.Configuration;
6

ANS

Example11

JCode Cell

1
2	import com.durgasoft.hbn.pojo.Employee;
3

ANS

Example12

JCode Cell

1
2	public class ClientApp {
3

ANS

Example13

JCode Cell

1
2	public static void main(String[] args) {
3	SessionFactory sessionFactory = null;
4	Session session = null;
5	try {
6	// Configuration cfg = new AnnotationConfiguration();
7	Configuration cfg = new Configuration();
8	cfg.setProperty("hibernate.connection.driver_Class","oracle.jdbc.OracleDriver");
9	cfg.setProperty("hibernate.connection.url","jdbc:oracle:thin:@localhost:1521:xe");
10	cfg.setProperty("hibernate.connection.username", "system");
11	cfg.setProperty("hibernate.connection.password", "durga");
12	cfg.setProperty("hibernate.dialect", "org.hibernate.dialect.OracleDialect");
13	cfg.addResource("Employee.hbm.xml");
14	//cfg.addAnnotatedClass(com.durgasoft.hbn.pojo.Employee.class);
15	sessionFactory = cfg.buildSessionFactory();
16	session = sessionFactory.openSession();
17	Employee emp = (Employee) session.get(Employee.class, 222);
18	if (emp == null) {
19	System.out.println("Employee Not Existed");
20	} else {
21	System.out.println("Employee Details");
22	System.out.println("====================");
23	System.out.println("Employee Number :" + emp.getEno());
24	System.out.println("Employee Name :" + emp.getEname());
25	System.out.println("Employee Salary :" + emp.getEsal());
26	System.out.println("Employee Address :" + emp.getEaddr());
27	}
28	} catch (Exception e) {
29	e.printStackTrace();
30	} finally {
31

ANS

Example14

JCode Cell

1
2	session.close();
3	sessionFactory.close();
4

ANS

Example on without configuration file and without mapping file in Programmatic approach:

Employee.java

Example15

JCode Cell

1
2	}
3	}
4	}
5

ANS

Example16

JCode Cell

1
2	package com.durgasoft.hbn.pojo;
3

ANS

Example17

JCode Cell

1
2	import javax.persistence.Column;
3	import javax.persistence.Entity;
4	import javax.persistence.Id;
5	import javax.persistence.Table;
6

ANS

Example18

JCode Cell

1
2	@Entity
3	@Table(name="emp1")
4	public class Employee {
5	@Id
6	@Column(name="ENO")
7	private int eno;
8	@Column(name="ENAME")
9	private String ename;
10	@Column(name="ESAL")
11	private float esal;
12	@Column(name="EADDR")
13	private String eaddr;
14

ANS

Example19

JCode Cell

1
2	public int getEno() {
3	return eno;
4	}
5	public void setEno(int eno) {
6	this.eno = eno;
7	}
8	public String getEname() {
9	return ename;
10	}
11	public void setEname(String ename) {
12	this.ename = ename;
13	}
14	public float getEsal() {
15	return esal;
16	}
17	public void setEsal(float esal) {
18	this.esal = esal;
19	}
20	public String getEaddr() {
21	return eaddr;
22	}
23	public void setEaddr(String eaddr) {
24	this.eaddr = eaddr;
25	}
26

ANS

ClientApp.java

Example20

JCode Cell

1
2	}
3

ANS

Example21

JCode Cell

1
2	package com.durgasoft.hbn.test;
3

ANS

Example22

JCode Cell

1
2	import org.hibernate.Session;
3	import org.hibernate.SessionFactory;
4	import org.hibernate.cfg.AnnotationConfiguration;
5	import org.hibernate.cfg.Configuration;
6

ANS

Example23

JCode Cell

1
2	import com.durgasoft.hbn.pojo.Employee;
3

ANS

Example24

JCode Cell

1
2	public class ClientApp {
3

ANS

Example25

JCode Cell

1
2	public static void main(String[] args) {
3	SessionFactory sessionFactory = null;
4	Session session = null;
5	try {
6	// Configuration cfg = new AnnotationConfiguration();
7	Configuration cfg = new Configuration();
8	cfg.setProperty("hibernate.connection.driver_Class","oracle.jdbc.OracleDriver");
9	cfg.setProperty("hibernate.connection.url","jdbc:oracle:thin:@localhost:1521:xe");
10	cfg.setProperty("hibernate.connection.username", "system");
11	cfg.setProperty("hibernate.connection.password", "durga");
12	cfg.setProperty("hibernate.dialect", "org.hibernate.dialect.OracleDialect");
13	//cfg.addResource("Employee.hbm.xml");
14	cfg.addAnnotatedClass(com.durgasoft.hbn.pojo.Employee.class);
15	sessionFactory = cfg.buildSessionFactory();
16	session = sessionFactory.openSession();
17	Employee emp = (Employee) session.get(Employee.class, 222);
18	if (emp == null) {
19	System.out.println("Employee Not Existed");
20	} else {
21	System.out.println("Employee Details");
22	System.out.println("====================");
23	System.out.println("Employee Number :" + emp.getEno());
24	System.out.println("Employee Name :" + emp.getEname());
25	System.out.println("Employee Salary :" + emp.getEsal());
26	System.out.println("Employee Address :" + emp.getEaddr());
27	}
28	} catch (Exception e) {
29	e.printStackTrace();
30	} finally {
31	session.close();
32	sessionFactory.close();
33

ANS

Example26

JCode Cell

1
2	}
3

ANS

In Programatic approach, if we want to change configuration details like connection properties or

database properties,.... then we have to perform modifications in JAVA code, if we perform

modifications in JAVA code then we must recompile the java application , it is not suggestible in

enterprise applications. To overcome the problem we have to use Declarative approach.

Example27

JCode Cell

1
2	}
3	}
4

2) Declarative approach

In Declarative approach, we will provide all configuration details in either properties file or in XML

file then we will send configuration details to Hibernate application.

There are two ways to provide configuration details to Hibernate Applications in Declarative

Approach.

2) Declarative approach

Example29

JCode Cell

1
2	By using properties file.
3	By Using XML file.
4

📝 Key Takeaways

Key ideas of Hibernate - Configuration Approaches explained simply
Ready-to-use code examples
Exam-style questions at the end

🧠 Test Your Knowledge

3 Questions

Progress: 0 / 3

Hibernate

Nearby lessons

Hibernate - Configuration Approaches

01ANS

02ANS

03ANS

04ANS

05ANS

06ANS

07ANS

08ANS

09ANS

10ANS

11ANS

12ANS

13ANS

14ANS

15ANS

16ANS

17ANS

18ANS

19ANS

20ANS

21ANS

22ANS

23ANS

24ANS

25ANS

26ANS

27ANS

282) Declarative approach

292) Declarative approach

🧠 Test Your Knowledge

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

ANS

2) Declarative approach

2) Declarative approach