How use java config to create a inner bean? - spring

Question

Spring Boot version:2.1.3.RELEASE,Spring Framework version:5.1.5.RELEASE.
Simple xml config like this:
<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="CustomerBean" class="io.github.ctlove0523.Customer">
<property name="person">
<bean class="io.github.ctlove0523.Person">
<property name="name" value="stackoverflow" />
<property name="address" value="address1" />
<property name="age" value="15" />
</bean>
</property>
</bean>
</beans>
how the java config would like?

Answer 1

Person.java
import org.springframework.beans.factory.annotation.Value;
public class Person {
#Override
public String toString() {
return "Person [name=" + name + ", address=" + address + ", age=" + age + "]";
}
private String name;
private String address;
private Integer age;
public String getName() {
return name;
}
#Value("stackoverflow")
public void setName(String name) {
this.name = name;
}
#Value("address1")
public void setAddress(String address) {
this.address = address;
}
#Value("15")
public void setAge(Integer age) {
this.age = age;
}
}
CustomerBean.java
import org.springframework.beans.factory.annotation.Autowired;
public class CustomerBean {
Person person;
public Person getPerson() {
return person;
}
#Autowired
public void setPerson(Person person) {
this.person = person;
}
}
App.java
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class App
{
public static void main( String[] args )
{
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
context.registerShutdownHook();
CustomerBean customerBean = context.getBean(CustomerBean.class);
System.out.println(customerBean.getPerson());
}
}
AppConfig.java
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
#Configuration
public class AppConfig {
#Bean
public CustomerBean customerBean() {
return new CustomerBean();
}
#Bean
public Person person() {
return new Person();
}
}
Output :
Person [name=stackoverflow, address=address1, age=15]
Edit: Is this what you are looking for ??
Create beans from inner class using spring

Answer 2

Check the Spring documentation on Java configuration : https://docs.spring.io/spring-javaconfig/docs/1.0.0.M4/reference/html/ch02s02.html
Depending on the code of your Person class, it would look something like this :
import io.github.ctlove0523.Customer;
#Configuration
public class AppConfig {
#Bean
public Customer customerBean() {
Customer myBean = new Customer();
// constructor or setter methods for Person
return myBean;
}
}