The idref in Spring, The idref element in spring framework
In this tutorial you will learn about the idref element in spring framework.
In this tutorial you will learn about the idref element in spring framework.
The idref element in spring framework
The idref element allow you to pass the bean id (which is the string value
not the reference) of another bean in the container to a <property/> or
<constructor-arg/>. In the given example it is clearly shown how pass the bean
id to another bean and also display the bean id.
FirstBean.java
package idref.example;
public class FirstBean {
private String message = null;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
|
AnotherBean.java
package idref.example;
public class AnotherBean {
private String amessage = null;
public String getAmessage() {
return amessage;
}
public void setAmessage(String amessage) {
this.amessage = amessage;
}
public void display() {
System.out.println(amessage);
}
}
|
IDREFMain.java
package idref.example;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class IDREFMain {
public static void main(String[] args) {
BeanFactory beanfactory = new ClassPathXmlApplicationContext(
"context.xml");
AnotherBean bean = (AnotherBean) beanfactory.getBean("another");
bean.display();
}
}
|
context.xml
<bean id="first" class="idref.example.FirstBean">
<property name="message" value="Spring is simple."/>
</bean>
<bean id="another" class="idref.example.AnotherBean">
<property name="amessage" >
<idref bean="first"/>
</property>
</bean> |
When you run this application it will display output as shown below:
first
Download this example code
