factory-method in Spring XML Configuration
March 09, 2023
factory-method property of <bean> element, is used to configure factory method. Factory method is used to create an instance of the class.
Find the XML Configuration for
factory-method.
<bean id="userService" class="com.concretepage.UserService" factory-method="createInstance"> </bean>
Complete Example
spring-config.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<bean id="userService" class="com.concretepage.UserService" factory-method="createInstance">
</bean>
</beans>
package com.concretepage;
public class UserService {
private static UserService userService = new UserService();
private UserService() {
System.out.println("Initialising UserService.");
}
public static UserService createInstance() {
return userService;
}
}
package com.concretepage;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringDemo {
public static void main(String... args) {
ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
context.getBean("userService");
}
}
Initialising UserService.
