Spring Autowiring byName

Spring autowiring byName means autowiring on the basis of name. If any bean property matches with exact one other bean’s name declaration then spring will automatically takes care of dependency.

Below diagram will make it clear:

For example:

I am taking example of autowire “byName” here.It will be almost same as Dependency injection via setter method with some changes in XML configuration file.

1.Country.java:

This is simple pojo class having some attributes so here country has name and object of Capital class.
Create Country.java under package org.arpit.java2blog.Copy following content into Country.java.

2.Capital.java

This is also simple pojo class having one attribute called “capitalName”.
Create Capital.java under package org.arpit.java2blog.java.Above Country class contains object of this class.Copy following content into Capital.java

3.BeanAutowiringByTypeMain.java

This class contains main function.Create BeanAutowiringByNameMain.java under package org.arpit.java2blog.Copy following content into BeanAutowiringByNameMain.java
You can note here that we have used ClassPathXmlApplicationContext for getting bean here.There are various ways for getting beans.In hello world example we have used XmlBeanFactory for getting beans.

4.ApplicationContext.xml


Here in ,we have used autowire attribute and set it to “byName”.So now spring container will match “capitalObj” reference in Country class with id or name of other beans in XML configuration file. So here you can see we have bean with id as “capitalObj”

5.Run it

When you will run above application,you will get following as output.

Add Comment