The ‘ListFactoryBean‘ class provides developer a way to create a concrete List collection class (ArrayList and LinkedList) in Spring’s bean configuration file.
Here’s a ListFactoryBean example, it will instantiate an ArrayList at runtime, and inject it into a bean property.
package com.mkyong.common;
import java.util.List;
public class Customer
{
private List lists;
//...
}
Spring’s bean configuration file.
<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-2.5.xsd">
<bean id="CustomerBean" class="com.mkyong.common.Customer">
<property name="lists">
<bean class="org.springframework.beans.factory.config.ListFactoryBean">
<property name="targetListClass">
<value>java.util.ArrayList</value>
</property>
<property name="sourceList">
<list>
<value>1</value>
<value>2</value>
<value>3</value>
</list>
</property>
</bean>
</property>
</bean>
</beans>
Alternatively, you also can use util schema and <util:list> to achieve the same thing.
<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-2.5.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd">
<bean id="CustomerBean" class="com.mkyong.common.Customer">
<property name="lists">
<util:list list-class="java.util.ArrayList">
<value>1</value>
<value>2</value>
<value>3</value>
</util:list>
</property>
</bean>
</beans>
Remember to include the util schema, else you will hit the following error
Caused by: org.xml.sax.SAXParseException:
The prefix "util" for element "util:list" is not bound.
Run it…
package com.mkyong.common;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class App {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext(
"SpringBeans.xml");
Customer cust = (Customer) context.getBean("CustomerBean");
System.out.println(cust);
}
}
Ouput
Customer [lists=[1, 2, 3]] Type=[class java.util.ArrayList]
You have instantiated ArrayList and injected it into Customer’s lists property at runtime.
Download Source Code
Download It – Spring-ListFactoryBean-Example.zip (5KB)
good………
Great, short, easy to learn tutorials. Well done.
instead of value tag use ref tag in list tag
Hi i do enjoy these tutorial very much. How can i set a project of this tutorial in eclipse indigo? where do i get the necessary jars? in wich folder the jar files must be in ?
Most projects are developed under Eclipse + Maven. Download the source and compile it with Maven.
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I need to set the list of class object to array list, can you give example.
below one is not working–
Instead of tag in tag,use tag and add the values
use ref tag instead of value tag in list tag