Spring Set Util

Spring Util is another custom namespace utility for creating sets. You can also explicitly control the exact type of Set that will be instantiated and populated via the use of the util schema.

Following example demonstrates Spring Set Util:

First create a new Java Project and configure it as Maven Project. For Reference, Click Here

Add the following dependencies in pom.xml




Create Address Class as following.

package com.kruders.bean;

public class Address {
	private String city;
	private String country;
	public String getCity() {
		return city;
	public void setCity(String city) {
		this.city = city;
	public String getCountry() {
		return country;
	public void setCountry(String country) {
		this.country = country;

Now create Employee Class as following

package com.kruders.bean;

import java.util.Set;

public class Employee {
	private String name;
	private Set<Address> set;
	public String getName() {
		return name;
	public void setName(String name) {
		this.name = name;
	public Set<Address> getSet() {
		return set;
	public void setSet(Set<Address> set) {
		this.set = set;

2. Configuration

Create Spring-Bean.xml and write the following code

<?xml version="1.0" encoding="UTF-8"?>
<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-2.5.xsd">

	<bean id="employee" class="com.kruders.bean.Employee">
		<property name="name" value="Puneet" />
		<property name="set">
			<util:set set-class="java.util.HashSet">
				<bean class="com.kruders.bean.Address">
					<property name="city" value="Delhi" />
					<property name="country" value="India" />

3. Run Program

Create Main.java class that displays the employee details and run it as Java Application

package com.kruders.core;

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

import com.kruders.bean.Address;
import com.kruders.bean.Employee;

public class Main {
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("Spring-Beans.xml");
		Employee employee = (Employee) context.getBean("employee");

		System.out.println("Name " + employee.getName());
		System.out.println("\nPrinting Set");
		for(Address address : employee.getSet()) {
			System.out.print("City " + address.getCity());
			System.out.println(", Country " + address.getCountry());

When you run the above example you’ll get an output like:

Name Puneet

Printing Set
City Delhi, Country India
City Banglore, Country India

The folder structure of the example is shown below in Figure 39.1

Figure 39.1 Figure 39.1

You can download the source code of this example here.


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