Here the below code will show you how to inject the Map in Spring using the spring.xml file. By using that we will inject the Map object in spring. -

Person.java

package com.evon;

public class Person {

    String name;
    String address;
    int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

}

Customer.java

package com.evon;
import java.util.Map;

public class Customer {


    private Map<Object, Object> map;



    public Map<Object, Object> getMap() {
        return map;
    }

    public void setMap(Map<Object, Object> map) {
        this.map = map;
    }

}

spring.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="person" class="com.evon.Person">
        <property name="name" value="Manish" />
        <property name="address" value="New Delhi" />
        <property name="age" value="25" />
    </bean>

    <bean id="customer" class="com.evon.Customer">

        <!-- java.util.Map -->
         <property name="map">
            <map>
                <entry key="val1" value="1" />
                <entry key="val2" value-ref="person" />
            </map>
        </property> 



    </bean>

</beans>

App.java

package com.evon;

import java.util.Iterator;

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

public class App {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext(
                "spring.xml");

        Customer cust = (Customer) context.getBean("customer");

        System.out.println(cust.getMap());

    }
}