Spring Collections (List, Set, Map, and Properties) example

Spring examples to show you how to inject values into collections type (List, Set, Map, and Properties). 4 major collection types are supported :

  • List – <list/>
  • Set – <set/>
  • Map – <map/>
  • Properties – <props/>

Spring beans




package collections;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class Customer {

	private List<String> phones;
	private Set<String> address ;
	private Map<String,String>course;
	private Properties pros;
	@Override
	public String toString() {
		return "Customer [phones=" + phones + ", address=" + address + ", course=" + course + ", pros=" + pros + "]";
	}
	public List<String> getPhones() {
		return phones;
	}
	public void setPhones(List<String> phones) {
		this.phones = phones;
	}
	public Set<String> getAddress() {
		return address;
	}
	public void setAddress(Set<String> address) {
		this.address = address;
	}
	public Map<String, String> getCourse() {
		return course;
	}
	public void setCourse(Map<String, String> course) {
		this.course = course;
	}
	public Properties getPros() {
		return pros;
	}
	public void setPros(Properties pros) {
		this.pros = pros;
	}
	public Customer(List<String> phones, Set<String> address, Map<String, String> course, Properties pros) {
		super();
		this.phones = phones;
		this.address = address;
		this.course = course;
		this.pros = pros;
	}
	public Customer() {
		super();
		// TODO Auto-generated constructor stub
	}

	
	
	
}

See different code snippets to declare collection in bean configuration file.

1. List example


	<property name="phones">

		<list>
	<value>1</value>
	<value>2</value>
	<value>3</value>
	<value>4</value>
	<value>5</value>
	</list>
	</property>

2. Set example



<property name="address">
		<set>
	<value>adsfd</value>
	<value>dsfv</value>
	<value>dsf</value>
	<value>df</value>
	<value>dvf</value>
	</set>
	</property>

3. Map example


	<property name="course">

<map>
<entry key="java" value="2month"></entry>
<entry key="c" value="1month"></entry>
<entry key="cpp" value="3month"></entry>
<entry key="python" value="1month"></entry>
<entry key="javasacript" value="2 month"></entry>

</map>

4. Properties example


	</property>	

	<!-- java.util.Properties -->
		<property name="pros">
			<props>
				<prop key="admin">admin@nospam.com</prop>
				<prop key="support">support@nospam.com</prop>
			</props>
		</property>

Full Spring’s bean configuration file.

<?xml version="1.0" encoding="UTF-8"?>
<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 class="collections.Customer" name="collection">
		
	<property name="phones">
		<list>
	<value>1</value>
	<value>2</value>
	<value>3</value>
	<value>4</value>
	<value>5</value>
	</list>
	</property>
	<property name="address">
		<set>
	<value>adsfd</value>
	<value>dsfv</value>
	<value>dsf</value>
	<value>df</value>
	<value>dvf</value>
	</set>
	</property>
	
<property name="course">
<map>
<entry key="java" value="2month"></entry>
<entry key="c" value="1month"></entry>
<entry key="cpp" value="3month"></entry>
<entry key="python" value="1month"></entry>
<entry key="javasacript" value="2 month"></entry>

</map>

</property>	
	<!-- java.util.Properties -->
		<property name="pros">
			<props>
				<prop key="admin">admin@nospam.com</prop>
				<prop key="support">support@nospam.com</prop>
			</props>
		</property>
	
	
	</bean>

</beans>

Run it…



package collections;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		ApplicationContext context = new ClassPathXmlApplicationContext("collections/collectionConfig.xml");

    	Customer cust = (Customer)context.getBean("collection");
    	System.out.println(cust.getAddress());
    	System.out.println(cust.getCourse());
    	System.out.println(cust.getPhones());
    	System.out.println(cust.getPros());
	}

}

Output



[adsfd, dsfv, dsf, df, dvf]
{java=2month, c=1month, cpp=3month, python=1month, javasacript=2 month}
[1, 2, 3, 4, 5]
{admin=admin@nospam.com, support=support@nospam.com}

] 

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