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How to use BeanFactory interface[IoC Container] methods? | Spring Tutorial | Spring Framework |
How to use BeanFactory interface[IoC Container] methods? | Spring Tutorial | Spring Framework |
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%20http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ram.core</groupId>
<artifactId>SpringDemo</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>SpringDemo</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>5.0.2.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring 5 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
</project>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0%20http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ram.core</groupId>
<artifactId>SpringDemo</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>SpringDemo</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>5.0.2.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring 5 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
</project>
Employee.java
package com.ram.core;
/**
* Spring bean
*
*/
public class Employee
{
private String name;
public void setName(String name)
{
this.name = name;
}
public void employeeDetails()
{
System.out.println("Employee Name = " + name);
}
}
/**
* Spring bean
*
*/
public class Employee
{
private String name;
public void setName(String name)
{
this.name = name;
}
public void employeeDetails()
{
System.out.println("Employee Name = " + name);
}
}
applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">
<bean id="employee" class="com.ram.core.Employee">
<property name="name" value="Peter" />
</bean>
</beans>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">
<bean id="employee" class="com.ram.core.Employee">
<property name="name" value="Peter" />
</bean>
</beans>
App.java
package com.ram.core;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class App
{
public static void main(String[] args)
{
Resource resource = new ClassPathResource("applicationContext.xml");
BeanFactory factory = new XmlBeanFactory(resource);
System.out.println("---------------------------------------");
// 1 st way of getting employee bean
Object object = factory.getBean("employee");
Employee employee = (Employee) object;
System.out.println(
"Got employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
// 2nd way of getting employee bean
employee = factory.getBean("employee", Employee.class);
System.out.println(
"\nGot employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
// 3rd way of getting employee bean
employee = factory.getBean(Employee.class);
System.out.println(
"\nGot employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
boolean result = factory.containsBean("employee");
System.out.println("\nis employee bean available? = " + result);
boolean isSingleton = factory.isSingleton("employee");
System.out.println(
"\nis employee bean Singleton[always return the same instance]? = "
+ isSingleton);
boolean isPrototype = factory.isPrototype("employee");
System.out.println(
"\nis employee bean isPrototype[always return independent instances]? = "
+ isPrototype);
}
}
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class App
{
public static void main(String[] args)
{
Resource resource = new ClassPathResource("applicationContext.xml");
BeanFactory factory = new XmlBeanFactory(resource);
System.out.println("---------------------------------------");
// 1 st way of getting employee bean
Object object = factory.getBean("employee");
Employee employee = (Employee) object;
System.out.println(
"Got employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
// 2nd way of getting employee bean
employee = factory.getBean("employee", Employee.class);
System.out.println(
"\nGot employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
// 3rd way of getting employee bean
employee = factory.getBean(Employee.class);
System.out.println(
"\nGot employee object from the BeanFactory(Spring Container)");
employee.employeeDetails();
boolean result = factory.containsBean("employee");
System.out.println("\nis employee bean available? = " + result);
boolean isSingleton = factory.isSingleton("employee");
System.out.println(
"\nis employee bean Singleton[always return the same instance]? = "
+ isSingleton);
boolean isPrototype = factory.isPrototype("employee");
System.out.println(
"\nis employee bean isPrototype[always return independent instances]? = "
+ isPrototype);
}
}
Output
Apr 07, 2018 10:14:54 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
is employee bean available? = true
is employee bean Singleton[always return the same instance]? = true
is employee bean isPrototype[always return independent instances]? = false
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
---------------------------------------
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
Got employee object from the BeanFactory(Spring Container)
Employee Name = Peter
is employee bean available? = true
is employee bean Singleton[always return the same instance]? = true
is employee bean isPrototype[always return independent instances]? = false
Refer:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_BeanFactory.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_BeanFactory
Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/a1d5b66cf948298a0bb7c33e9b2c0967275f5a95/Spring_2018/SpringDemo_BeanFactory/?at=master
See also:
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