Spring spel list map example

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Spring SpEL List/Map:

Spring spel provides the facility to get values from List or Map. It works same as in java.

Example:

MapListTest.java

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Component;

@Component("mapListTestBean")
public class MapListTest {
	private Map map;
	private List list;

	public MapListTest() {
		map = new HashMap();
		map.put("stu1", "Mahesh");
		map.put("stu2", "Vivek");
		map.put("stu3", "Bharat");

		list = new ArrayList();
		list.add("Nidhi");
		list.add("Prabhjot");
		list.add("Amani");

	}

	public Map getMap() {
		return map;
	}

	public void setMap(Map map) {
		this.map = map;
	}

	public List getList() {
		return list;
	}

	public void setList(List list) {
		this.list = list;
	}
}

Student.java

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

@Component("studentBean")
public class Student {
	@Value("#{mapListTestBean.map['stu1']}")
	private String stu1;	
	
	@Value("#{mapListTestBean.list[0]}")
	private String list;

	public String getStu1() {
		return stu1;
	}

	public void setStu1(String stu1) {
		this.stu1 = stu1;
	}

	public String getList() {
		return list;
	}

	public void setList(String list) {
		this.list = list;
	}
	
}

applicationContext.xml

Test.java

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

/**
 * Spring SPEL Lists, Maps 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("From Map: "+student.getStu1()); 
  System.out.println("From List: "+student.getList()); 
 }
}

Output: 

From Map: Mahesh
From List: Nidhi

 
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