Spring DI way to declare & Instaniate an Arraylist?

Question

Starting out with Spring. And, I heard someone say that it prevents the use of the 'new' keyword. So, I was curious to know how would one write the code below the Spring DI way?

private ArrayList<String> arrayMan;

public SpringDI() {
arrayMan = new ArrayList<String>();

}

See the link below http://stackoverflow.com/questions/2416056/how-to-define-a-list-bean-in-spring — Jabir, Mar 21 '13 at 12:59

score 3 · Accepted Answer · answered Mar 21 '13 at 13:05

This is how this can be done using spring.

<bean id="arrayMan" class="java.util.ArrayList">
    <constructor-arg>
        <list>
            <ref bean="one"/>
            <ref bean="two"/>                
        </list>
    </constructor-arg>
</bean>

Hope it helps

score 1 · Answer 2 · answered Mar 21 '13 at 12:59

1

This is perfectly ok, in terms of spring DI.

If it is the default value of the variable there is nothing wrong with initializing it with new.

But if you still want to inject a list you can use

<list>
    <value>...</value>
</list>

answered Mar 21 '13 at 12:59

Arun P Johny

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What is the preferred way to do this, when working on a real spring project? I mean as a "Java Developer"?. – AppSensei Mar 21 '13 at 13:01
1

If it is a simple list like what you have, what you have did is right – Arun P Johny Mar 21 '13 at 13:04

Spring DI way to declare & Instaniate an Arraylist?

2 Answers2