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How to use <map> element in Spring XML configuration with Example
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Below is an example of "How to use element in Spring XML configuration with Example"
Step.1 Start a Java Project with required jars 
  1. Open Eclipse
  2. Click on menu New -> Others
  3. In wizards type "Java Project" and Select "Java Project"
  4. Click Next
  5. Enter project name as "InjectingMapPropertiesInBeanConfiguration", then click Next
  6. Goto Libraries tab, then click on Add External JARs, then select Spring's 21 Framework Jars and commons-logging-1.1.jar.
  7. Click Finish.
Step.2 Project Explorer Preview 
RunMyProgram.java
package com.springexample;

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

public class RunMyProgram {
	public static void main(String[] args) {
		ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
		StudentHolder studentHolder = (StudentHolder) context.getBean("studentHolder");
		
		for (String studentNoKey:studentHolder.getStudents().keySet()){
			Student student = studentHolder.getStudents().get(studentNoKey);
			
			System.out.println("Student Details");
			System.out.println("---------------");
			System.out.println("Student No: "+student.getStudentNo());
			System.out.println("Student Name: "+student.getStudentName());
			System.out.println();
		}
	}
}
StudentHolder.java
package com.springexample;

import java.util.HashMap;
import java.util.Map;

public class StudentHolder {
	Map students = new HashMap();

	public Map getStudents() {
		return students;
	}
	public void setStudents(Map students) {
		this.students = students;
	}
}
beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

	<bean id="student1" class="com.springexample.Student" p:studentNo="1001" p:studentName="John" />
	<bean id="student2" class="com.springexample.Student" p:studentNo="1002" p:studentName="Peter" />
	<bean id="student3" class="com.springexample.Student" p:studentNo="1003" p:studentName="Viva" />

	<bean id="studentHolder" class="com.springexample.StudentHolder">
		<property name="students">
			<map>
				<entry key="1001" value-ref="student1" />
				<entry key="1002" value-ref="student2" />
				<entry key="1003" value-ref="student3" />
			</map>
		</property>
	</bean>
</beans>
Student.java
package com.springexample;

public class Student {
	private int studentNo;
	private String studentName;
	
	public int getStudentNo() {
		return studentNo;
	}
	public void setStudentNo(int studentNo) {
		this.studentNo = studentNo;
	}
	public String getStudentName() {
		return studentName;
	}
	public void setStudentName(String studentName) {
		this.studentName = studentName;
	}	
}
Output 
Student Details
---------------
Student No: 1001
Student Name: John

Student Details
---------------
Student No: 1002
Student Name: Peter

Student Details
---------------
Student No: 1003
Student Name: Viva
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