Invoke static method from spring config

Question

Is it possible to invoke static method in Spring configuration file?

public MyClass {

   public static void staticMethod() {
       //do something
   }

}

<bean id="myBean" class="MyClass">
   <!-- invoke here -->
</bean>

In order for spring to invoke it automatically it must belong to some spring bean. There is no meaning to just calling it from the configuration. — Stav Saad, Dec 04 '14 at 14:18
I need to return a value from a static method and use the value as property value , can any one help please — Sayak Choudhury, Oct 23 '18 at 12:09
Use `@Value` annotation as shown in https://stackoverflow.com/a/60556247/839733 — Abhijit Sarkar, Mar 06 '20 at 01:17

score 23 · Answer 1 · edited Dec 04 '14 at 14:37

23

When the static method creates an instance of MyClass you an do it like this

config

<bean id="myBean" class="MyClass" factory-method="staticMethod">
   <!-- invoke here -->
</bean>

code

public static MyClass staticMethod() {
       //create and Configure a new Instance
}

If you want the method only to be called on bean instantiation spring can't do it this way.

config

<bean id="myBean" class="MyClass" init-method="init">
   <!-- invoke here -->
</bean>

code

public static void staticMethod() {
       //create and Configure a new Instance
}

public void init() {
     staticMethod();
}

edited Dec 04 '14 at 14:37

Xstian

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answered Dec 04 '14 at 14:33

Hank Lapidez

1,857
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23

2

Don't know why this answer was down-voted... it answers the question more accurately than the up-voted answer IMO. – John Rix Mar 30 '15 at 13:11
I need to return a value from a static method and use the value as property value , can any one help please – Sayak Choudhury Oct 23 '18 at 12:12
1

What if the static method requires arguments? how do you pass them? – Ghilteras Jan 29 '19 at 21:37
Method 1 won't work with params this way. With method 2 the params could be instance properties of MyClass and used int init() as args to staticMethod. more examples here https://www.javatpoint.com/dependency-injection-with-factory-method . May type 3 from the examples could help. – Hank Lapidez Feb 05 '19 at 10:09

Evgeniy Dorofeev · Answer 2 · 2014-12-04T14:52:01.170

17

try this

<bean id="b1" class="org.springframework.beans.factory.config.MethodInvokingBean">
    <property name="staticMethod" value="MyClass.staticMethod" />
</bean>

see http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/beans/factory/config/MethodInvokingBean.html

edited Dec 04 '14 at 14:52

answered Dec 04 '14 at 14:26

Evgeniy Dorofeev

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MethodInvokingFactoryBean also assumes the method has a return value. – Hank Lapidez Dec 04 '14 at 14:48
Is there a way to return a static value? – xetra11 Jun 12 '18 at 13:59

score 4 · Answer 3 · edited May 23 '17 at 12:02

Try something like this:

<!-- call static method -->
<bean id="test" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="targetClass" value="MyClass" />
    <property name="targetMethod" value="staticMethod" />
    <property name="arguments">
        <list>
            <value>anArgument</value>
        </list>
    </property>
</bean>

Remove arguments as you might not need them.

Taken from https://gist.github.com/bulain/1139874

I was needing to call a static method. The above code worked fine.

This might be useful as well: How to make spring inject value into a static field.

score 0 · Answer 4 · answered Sep 30 '16 at 10:23

If you are using annotations for spring configuration you can add the following method into your @Configuration class:

@Bean
public MethodInvokingFactoryBean methodInvokingFactoryBean() {
    MethodInvokingFactoryBean methodInvokingFactoryBean = new MethodInvokingFactoryBean();
    methodInvokingFactoryBean.setStaticMethod("MyClass.staticMethod");

    return methodInvokingFactoryBean;
}

Invoke static method from spring config

4 Answers4