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Spring Constructor arg type

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In this example you will see how to inject the arguments into your bean by matching the constructor arguments type.

Constructor argument type matching

In this example you will see how to inject the arguments into your bean by matching the constructor arguments type.

ConstructorInjection.java

package net.roseindia;

public class ConstructorInjection {
  private String name = null;
  private int roll;

  public ConstructorInjection(String name, int roll) {
    this.name = name;
    this.roll = roll;
  }

  public String getMessage() {
    return name;
  }
  
  public int getValue() {
    return roll;
  }
}

ConstructorInjectionTest
.java

package net.roseindia;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ConstructorInjectionTest {
  public static void main(String[] args) {
    BeanFactory beanfactory = new ClassPathXmlApplicationContext(
        "context.xml");
    ConstructorInjection bean = (ConstructorInjectionbeanfactory
        .getBean("springMessage");
    System.out.println(bean.getMessage());
    System.out.println(bean.getValue());
  }
}

context.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:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
>
<bean id="springMessage" class="net.roseindia.ConstructorInjection">
   <constructor-arg type="java.lang.String" value="Rakesh Pandey" />
   <constructor-arg type="int" value="101" />
  </bean>
</beans>

When you run this application it display output as shown below:

Rakesh Pandey
101

Download this example code

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Posted on: August 2, 2010 If you enjoyed this post then why not add us on Google+? Add us to your Circles

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