Dependency Injection – Java and Spring Examples

Example Spring 4 – Lifecycle Callback Methods

admin — Tue, 19 Feb 2019 16:55:16 +0000

This example presents the basic concept of using setter injection in Spring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.LifecycleCallbackMethods;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class A {
	@PostConstruct
	public void init() throws Exception {
		System.out.println("A @PostConstruct-init() method invoked");
	}

	@PreDestroy
	public void destroy() throws RuntimeException {
		System.out.println("A @PreDestroy-destroy() method invoked");
	}
}

package javaspringexamples.spring.ioc.LifecycleCallbackMethods;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class B implements InitializingBean, DisposableBean {

	@Override
	public void afterPropertiesSet() throws Exception {
		System.out.println("B InitializingBean-afterPropertiesSet() method invoked");
	}

	@Override
	public void destroy() throws Exception {
		System.out.println("B DisposableBean-destroy() method invoked");
	}

}

package javaspringexamples.spring.ioc.LifecycleCallbackMethods;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class C {
	public void init() throws Exception {
		System.out.println("C init-method=\"init\"-init() method invoked");
	}

	public void destroy() throws RuntimeException {
		System.out.println("C destroy-method=\"destroy\"-destroy() method invoked");
	}
}

package javaspringexamples.spring.ioc.LifecycleCallbackMethods;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"classpath:/applicationContext.xml");
		applicationContext.registerShutdownHook();
	}

}


	4.0.0

	javaspringexamples.spring
	Lifecycle-Callback-Methods
	0.0.1-SNAPSHOT
	jar

	example Lifecycle Callback Methods

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

The output is :
A @PostConstruct-init() method invoked
B InitializingBean-afterPropertiesSet() method invoked
C init-method= »init »-init() method invoked
C destroy-method= »destroy »-destroy() method invoked
B DisposableBean-destroy() method invoked
A @PreDestroy-destroy() method invoked

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Dependency Injection – Setter Injection

admin — Tue, 19 Feb 2019 14:25:58 +0000

This example presents the basic concept of using setter injection in Spring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.setterInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class A {
	private B b;
	private C c;

	public B getB() {
		return b;
	}

	public void setB(B b) {
		this.b = b;
	}

	public C getC() {
		return c;
	}

	public void setC(C c) {
		this.c = c;
	}

	@Override
	public String toString() {
		return b.toString() + " - " + c.toString();
	}
}

package javaspringexamples.spring.ioc.setterInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class B {
	private String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return name;
	}

}

package javaspringexamples.spring.ioc.setterInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class C {
	private String name;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return name;
	}
}

package javaspringexamples.spring.ioc.setterInjection.xml;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"/javaspringexamples/spring/ioc/setterInjection/xml/xmlConfiguration.xml");

		// Getting and printing objectA
		A objectA = (A) applicationContext.getBean("objectA");
		System.out.println(objectA);

	}

}


    4.0.0
 
    javaspringexamples.spring
    example-XML-Based-Setter-Injection
    0.0.1-SNAPSHOT
    jar
 
    example XML Based Setter Injection
 
    
        4.3.4.RELEASE
    
 
    
        
            org.springframework
            spring-context
            ${springframework.version}
        
    
 
    
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.6.0
                
                    1.8
                    1.8

The output is :
Object B – Object C

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Dependency Injection – Constructor Injection

admin — Mon, 18 Feb 2019 16:42:36 +0000

This example presents the basic concept of using constructor injection in Spring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.constructorInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class A {
	private B b;
	private C c;
	
	public A(B b, C c) {
		this.b = b;
		this.c = c;
	}

	public A(C c, B b) {
		this.b = b;
		this.c = c;
	}

	@Override
	public String toString() {
		return b.toString() + "-" + c.toString();
	}

}

package javaspringexamples.spring.ioc.constructorInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class B {
	private String name;

	public B(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return name;
	}

}

package javaspringexamples.spring.ioc.constructorInjection.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class C {
	private String name;

	public C(String name) {
		this.name = name;
	}

	@Override
	public String toString() {
		return name;
	}
}

package javaspringexamples.spring.ioc.constructorInjection.xml;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"/javaspringexamples/spring/ioc/constructorInjection/xml/xmlConfiguration.xml");

		// Getting and printing objectA_BC
		A objectA = (A) applicationContext.getBean("objectA_BC");
		System.out.println(objectA);

		// Getting and printing objectA_BC
		objectA = (A) applicationContext.getBean("objectA_CB");
		System.out.println(objectA);

	}

}


    4.0.0
 
    javaspringexamples.spring
    example-XML-Based-Constructor-Injection
    0.0.1-SNAPSHOT
    jar
 
    example XML Based Constructor Injection
 
    
        4.3.4.RELEASE
    
 
    
        
            org.springframework
            spring-context
            ${springframework.version}
        
    
 
    
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
                3.6.0
                
                    1.8
                    1.8

The output is :
Object B-Object C
Object B-Object C

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Annotation Based Autowiring

admin — Fri, 07 Dec 2018 15:33:52 +0000

This example presents the basic concept of using in Spring the Annotation based Autowiring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.autowiring.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.autowiring.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.autowiring.annotation;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Repository;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */

@Repository
@Qualifier("userDao")
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.autowiring.annotation;

import org.springframework.stereotype.Repository;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */

@Repository
public class UserDaoJdbcImpl implements UserDao {

	@Override
	public void insert(User user) {
		
	}

	@Override
	public void update(User user) {
		
	}

	@Override
	public void delete(int userId) {
		
	}

	@Override
	public User find(int userId) {
		return null;
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		
	}
}

package javaspringexamples.spring.ioc.autowiring.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.autowiring.annotation;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */

@Service
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	@Autowired
	@Qualifier("userDao")
	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}


	4.0.0

	javaspringexamples.spring
	example-Annotation-Based-Autowiring
	0.0.1-SNAPSHOT
	jar

	example Annotation Based Autowiring

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

package javaspringexamples.spring.ioc.autowiring.annotation;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"javaspringexamples/spring/ioc/autowiring/annotation/annotationConfiguration.xml");
		UserService userService = applicationContext.getBean(UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));

	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Java Based Autowiring

admin — Fri, 07 Dec 2018 15:24:33 +0000

This example presents the basic concept of using in Spring the Java based Autowiring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.autowiring.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.autowiring.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.autowiring.java;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.autowiring.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoJdbcImpl implements UserDao {

	@Override
	public void insert(User user) {
		
	}

	@Override
	public void update(User user) {
		
	}

	@Override
	public void delete(int userId) {
		
	}

	@Override
	public User find(int userId) {
		return null;
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		
	}
}

package javaspringexamples.spring.ioc.autowiring.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.autowiring.java;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	@Autowired
	@Qualifier
	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}

package javaspringexamples.spring.ioc.autowiring.java;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
@Configuration
public class JavaConfiguration {

	@Bean
	public UserService userService() {
		UserServiceImpl bean = new UserServiceImpl();
		return bean;
	}

	@Bean
	@Qualifier
	public UserDao userDao() {
		UserDaoInMemoryImpl bean = new UserDaoInMemoryImpl();
		return bean;
	}
	
	@Bean
	public UserDao userJdbcDao() {
		UserDaoJdbcImpl bean = new UserDaoJdbcImpl();
		return bean;
	}
}


	4.0.0

	javaspringexamples.spring
	example-Java-Based-Autowiring
	0.0.1-SNAPSHOT
	jar

	example Java Based Autowiring

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

package javaspringexamples.spring.ioc.autowiring.java;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(
				JavaConfiguration.class);
		UserService userService = applicationContext.getBean("userService", UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));
	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Xml Based Autowiring

admin — Fri, 07 Dec 2018 15:05:28 +0000

This example presents the basic concept of using in Spring the Xml based Autowiring.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.autowiring.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.autowiring.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.autowiring.xml;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.autowiring.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoJdbcImpl implements UserDao {

	@Override
	public void insert(User user) {
		
	}

	@Override
	public void update(User user) {
		
	}

	@Override
	public void delete(int userId) {
		
	}

	@Override
	public User find(int userId) {
		return null;
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		
	}
}

package javaspringexamples.spring.ioc.autowiring.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.autowiring.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}


	4.0.0

	javaspringexamples.spring
	example-XML-Based-autowiring
	0.0.1-SNAPSHOT
	jar

	example XML Based Autowiring

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

package javaspringexamples.spring.ioc.autowiring.xml;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"javaspringexamples/spring/ioc/autowiring/xml/XmlConfiguration.xml");
		UserService userService = applicationContext.getBean("userService", UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));
	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Annotation Based Configuration

admin — Thu, 29 Nov 2018 16:41:52 +0000

This example presents the basic concept of using in Spring the Annotation based configuration.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.configuration.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.configuration.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.configuration.annotation;

import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Repository;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */

@Repository
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.configuration.annotation;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.configuration.annotation;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */

@Service
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	@Autowired
	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}

package javaspringexamples.spring.ioc.configuration.annotation;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"/javaspringexamples/spring/ioc/configuration/annotation/configuration.xml");
		UserService userService = applicationContext.getBean(UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));
	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – Java Based Configuration

admin — Mon, 26 Nov 2018 09:00:42 +0000

This example presents the basic concept of using in Spring the Java based configuration.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.configuration.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.configuration.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.configuration.java;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.configuration.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.configuration.java;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}

package javaspringexamples.spring.ioc.configuration.java;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
@Configuration
public class JavaConfiguration {

	@Bean
	public UserService userService() {
		UserServiceImpl bean = new UserServiceImpl();
		bean.setUserDao(userDao());
		return bean;
	}

	@Bean
	public UserDao userDao() {
		UserDaoInMemoryImpl bean = new UserDaoInMemoryImpl();
		return bean;
	}
}


	4.0.0

	javaspringexamples.spring
	example-Java-Based-Configuration
	0.0.1-SNAPSHOT
	jar

	example Java Based Configuration

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

package javaspringexamples.spring.ioc.configuration.java;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(JavaConfiguration.class);
		UserService userService = applicationContext.getBean("userService", UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));
	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file

Example Spring 4 – XML Based Configuration

admin — Fri, 23 Nov 2018 15:14:49 +0000

This example presents the basic concept of using in Spring the XML based configuration.

The technologies used are :
– Spring 4.3.4
– JDK 1.8
– Maven 3.3.9

You can convert this example to an Eclipse IDE project by going to folder where is the pom.xml is, and use the command :

mvn eclipse:eclipse

package javaspringexamples.spring.ioc.configuration.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class User {

	private int id;
	private String fisrtName;
	private String lastName;
	private boolean Accountlocked;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getFisrtName() {
		return fisrtName;
	}

	public void setFisrtName(String fisrtName) {
		this.fisrtName = fisrtName;
	}

	public String getLastName() {
		return lastName;
	}

	public void setLastName(String lastName) {
		this.lastName = lastName;
	}

	public boolean isAccountlocked() {
		return Accountlocked;
	}

	public void setAccountlocked(boolean accountlocked) {
		Accountlocked = accountlocked;
	}
}

package javaspringexamples.spring.ioc.configuration.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserDao {

	User find(int userId);

	void insert(User user);

	void update(User user);

	void delete(int userId);

	void lockAccount(int userId, boolean locked);

}

package javaspringexamples.spring.ioc.configuration.xml;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserDaoInMemoryImpl implements UserDao {

	private Map usersMap = new HashMap<>();

	{
		User user1 = new User();
		user1.setId(1);
		user1.setFisrtName("FirstName 1");
		user1.setLastName("LastName 1");
		user1.setAccountlocked(false);

		User user2 = new User();
		user2.setId(2);
		user2.setFisrtName("FirstName 2");
		user2.setLastName("LastName 2");
		user2.setAccountlocked(false);

		usersMap.put(user1.getId(), user1);
		usersMap.put(user2.getId(), user2);

	}

	@Override
	public void insert(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void update(User user) {
		usersMap.put(user.getId(), user);
	}

	@Override
	public void delete(int userId) {
		usersMap.remove(userId);
	}

	@Override
	public User find(int userId) {
		return usersMap.get(userId);
	}

	@Override
	public void lockAccount(int userId, boolean locked) {
		User user = usersMap.get(userId);
		user.setAccountlocked(locked);
		update(user);
	}
}

package javaspringexamples.spring.ioc.configuration.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public interface UserService {

	String getUserinformation(int userId);

	void lockAccountUser(int userId);

	void unlockAccountUser(int userId);
}

package javaspringexamples.spring.ioc.configuration.xml;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class UserServiceImpl implements UserService {
	private UserDao userDao;

	public void setUserDao(UserDao userDao) {
		this.userDao = userDao;
	}

	@Override
	public void lockAccountUser(int userId) {
		userDao.lockAccount(userId, true);
	}

	@Override
	public void unlockAccountUser(int userId) {
		userDao.lockAccount(userId, false);
	}

	@Override
	public String getUserinformation(int userId) {
		User user = userDao.find(userId);
		return user.getFisrtName() + " - " + user.getLastName() + " - " + user.isAccountlocked();
	}
}


	4.0.0

	javaspringexamples.spring
	example-XML-Based-Configuration
	0.0.1-SNAPSHOT
	jar

	example XML Based Configuration

	
		4.3.4.RELEASE
	

	
		
			org.springframework
			spring-context
			${springframework.version}
		
	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.6.0
				
					1.8
					1.8

package javaspringexamples.spring.ioc.configuration.xml;

import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 
 * @author mounir.sahrani@gmail.com
 *
 */
public class Main {

	public static void main(String[] args) {
		ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
				"/javaspringexamples/spring/ioc/configuration/xml/XmlConfiguration.xml");
		UserService userService = applicationContext.getBean("userService", UserService.class);

		System.out.println("User1 Informations: " + userService.getUserinformation(1));
		System.out.println("User2 Informations: " + userService.getUserinformation(2));

		System.out.println("Locking User1 account");
		userService.lockAccountUser(1);
		System.out.println("User1 Informations: " + userService.getUserinformation(1));
	}

}

Get the sources of the example from the following GitHub url

Or Download a .zip file