Spring instantiates javabeans in three ways

The first is to configure the javabean file directly

XML beans.

<bean id="sayhello" class="test.service.impl.HelloBean"/>

PersonDao. Java

package springdao;
public class personDao {
 private String name;
 private String dep;
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getDep() {
  return dep;
 }
 public void setDep(String dep) {
  this.dep = dep;
 }

 public void Test(){  
  System.out.println("hello,spring");
 }
}
springtest.java
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  ApplicationContext ctx = new ClassPathXmlApplicationContext(new String[]{"beans.xml"});
  personDao pe=(personDao)ctx.getBean("persondao");//By configuring javabeans & NBSP;      
 }

The second: XML configuration +factory class, instantiated using static factory methods

XML beans.

<bean id="productCreator" class="serviceImpl.productCreator" factory-method="createPersonDao"></bean> 

ProductCreator. Java

package serviceImpl;
import springdao.personDao;
public class productCreator {
  public static personDao createPersonDao(){
   return new personDao();
  }

  public personDao productAcreate(){
   return new personDao();
  }
}
 
springtest.java 
personDao pe=(personDao)ctx.getBean("productCreator"); 
pe.test(); 

PersonDao, Java same method one file

@note: the red part must be defined with the static keyword

3. XML configuration +factory class, instantiated using the instance factory method

XML beans.

<bean id="productCreator" class="serviceImpl.productCreator"/> 
<bean id="productAcreate" factory-bean="productCreator" factory-method="productAcreate"/> 

Springtest. Java

personDao pe=(personDao)ctx.getBean("productAcreate");//Instantiate the bean file by configuring the instance factory method
pe.test();

The productCreator. Java and persondao.java files are the same as above