Example of @Configuration in Spring
March 11, 2013
In spring @Configuration can be used for XML free coding. @Configuration belongs to the package org.springframework.context.annotation. @Configuration is annotation based. Find the code snippet for how to use @Configuration.
XMLFreeBeanTestConfig.java
package com.concretepage;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class XMLFreeBeanTestConfig {
@Bean
public City getCity() {
City city= new City();
city.setCityName("Varanasi");
city.setArea(500);
return city;
}
@Bean
public Student getStudent(){
Student student=new Student();
student.setCity(getCity());
return student;
}
}
<bean id="city" class="com.concretepage.City"> <property name="cityName" value="Varanasi"/> <property name="area" value="500"/> </bean> <bean id="student" class="com.concretepage. Student "> <property name="city"> <ref bean=" city" /> </property> </bean>
City.java
package com.concretepage;
public class City {
private String cityName;
private int area;
public String getCityName() {
return cityName;
}
public void setCityName(String cityName) {
this.cityName = cityName;
}
public int getArea() {
return area;
}
public void setArea(int area) {
this.area = area;
}
}
Student.java
package com.concretepage;
public class Student {
private City city;
public City getCity() {
return city;
}
public void setCity(City city) {
this.city = city;
}
}
XMLFreeBeanTest.java
package com.concretepage;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class XMLFreeBeanTest {
public static void main(String[] args) {
AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
ctx.register(XMLFreeBeanTestConfig.class);
ctx.refresh();
Student student = ctx.getBean(Student.class);
System.out.println(student.getCity().getCityName());
System.out.println(student.getCity().getArea());
}
}
