Spring spel bean reference tutorial

Spring SpEL Bean Reference:

Spring spel provides the facility to refer a bean and nested properties using a dot (.) symbol.

Syntax:

#{beanName.propertyName}

Example:

Address.java

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component("addressBean")
public class Address {
	@Value("Sec-A")
	private String street;
	@Value("122001")
	private int postcode;
	@Value("India")
	private String country;
	
	public String getStreet() {
		return street;
	}
	public void setStreet(String street) {
		this.street = street;
	}
	public int getPostcode() {
		return postcode;
	}
	public void setPostcode(int postcode) {
		this.postcode = postcode;
	}
	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}
}

Student.java

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component("studentBean")
public class Student {
	@Value("Jai")
	private String name;	
	
	@Value("#{addressBean.street}")
	private String street;
	
	@Value("#{addressBean.country}")
	private String country;
	
	@Value("#{addressBean.postcode}")
	private String postcode;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
	public String getStreet() {
		return street;
	}
	public void setStreet(String street) {
		this.street = street;
	}

	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}

	public String getPostcode() {
		return postcode;
	}
	public void setPostcode(String postcode) {
		this.postcode = postcode;
	}	
	
}

applicationContext.xml

Test.java

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

/**
 * Spring SPEL bean reference example.
 * @author W3schools360
 */
public class Test {
   public static void main(String args[]){	
	 //Get application context object.
	 ApplicationContext context = 
	   new ClassPathXmlApplicationContext("applicationContext.xml");
		
	 //Get studentBean.
	 Student student = (Student) context.getBean("studentBean");
		
	 //Print student properties.
	 System.out.println("Name: "+student.getName()); 
	 System.out.println("Street: "+student.getStreet()); 
	 System.out.println("Postal: "+student.getPostcode()); 
  	 System.out.println("Country: "+student.getCountry()); 
   }
}

Output:

Name: Jai
Street: Sec-A
Postal: 122001
Country: India

 
Download this example.
 

Alex Martin