Initializing collections in spring

Table of Contents

Tutorial Content: Spring tutorial for beginners
1.Country.java:
2.ApplicationContext.xml
3.InitializingCollectionsMain.java
4.Run it

This is 9 of 16 parts of tutorial series

Tutorial Content: Spring tutorial for beginners

In previous posts we have seen how to initialize any string or reference via property’s value tag or ref tag.In this post we will see how to initialize any collections in spring.
For configuring spring in your eclipse ide please refer hello world example

1.Country.java:

This is simple pojo class having some attributes so here country has name and list of states.

Create Country.java under package org.arpit.javapostsforlearning.Copy following content into Country.java.

package org.arpit.javapostsforlearning;

import java.util.List;

public class Country {

String countryName;

List listOfStates;

public String getCountryName() {

return countryName;

}

public void setCountryName(String countryName) {

this.countryName = countryName;

}

public List getListOfStates() {

return listOfStates;

}

public void setListOfStates(List listOfStates) {

this.listOfStates = listOfStates;

}

public void printListOfStates()

{

System.out.println("Some of states in india are:");

for(String state:listOfStates)

{

System.out.println(state);

}

2.ApplicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

<list>

<value>Maharastra</value>

<value>Madhya Pradesh</value>

<value>Rajasthan</value>

</list>

</property>

</bean>

</beans>

here for initializing collectios(list) i.e. listofStates attribute of country class, we have used list tag.

In tag ,you can have tag or tag for adding values in list.

3.InitializingCollectionsMain.java

This class contains main function.Create InitializingCollectionsMain.java under package org.arpit.javapostsforlearning.Copy following content into InitializingCollectionsMain.java

package org.arpit.javapostsforlearning;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class InitializingCollectionsMain{

public static void main(String[] args) {

ApplicationContext appContext = new ClassPathXmlApplicationContext("ApplicationContext.xml");

Country countryObj = (Country) appContext.getBean("CountryBean");

countryObj.printListOfStates();

}

You can note here that we have used ClassPathXmlApplicationContext for getting bean here.There are various ways for getting beans.In hello world example we have used XmlBeanFactory for getting beans.

4.Run it

When you will run above application,you will get following as output.

Some of states in india are:

Maharastra

Madhya Pradesh

Rajasthan

That’s all about Initializing collections in spring.
In next post,we will see beans autowiring in spring.

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spring security database authentication example

Spring NamedParameterJdbcTemplate example

Spring JdbcTemplate example

Spring @RestController example

Spring Rest Hibernate example

Spring MVC @RequestMapping annotation example

Spring MVC angularjs example

Spring Restful web services xml example

Spring Restful client – RestTemplate example

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Initializing collections in spring

Tutorial Content: Spring tutorial for beginners

1.Country.java:

2.ApplicationContext.xml

3.InitializingCollectionsMain.java

4.Run it

You may also like:

Spring init-method and destroy-method example

spring security database authentication example

Spring NamedParameterJdbcTemplate example

Spring JdbcTemplate example

Spring @RestController example

Spring Rest Hibernate example

Spring MVC @RequestMapping annotation example

Spring MVC angularjs example

Spring Restful web services xml example

Spring Restful client – RestTemplate example

Author

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Tutorial Content: Spring tutorial for beginners

1.Country.java:

2.ApplicationContext.xml

3.InitializingCollectionsMain.java

4.Run it

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Related Posts

No qualifying bean of type in Spring or Spring Boot

Spring XML configuration example

Injecting Prototype bean into a Singleton bean in Spring

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Spring init-method and destroy-method example

Prefix “context” for element “context:component-scan” or “context:annotation-config” is not bound : Spring error

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