Spring 使用实例工厂方法实例化Bean

public class Speaker {   //使用实例工厂方法实例化Bean  private String speakerName;   public Speaker(String speakerName) {   this.speakerName = speakerName;  }   /**   * 演讲   */  public void speech() {   System.out.println(toString());  }    @Override  public String toString() {   return "Speaker [speakerName=" + speakerName + "]";  } }

2、创建SpeakerFactory对象。

public class SpeakerFactory {   /**   * 工厂方法   * @param speakerName   * @return   */  public Speaker newInstance() {   String speakerName = "Lucy And Lily";   return new Speaker(speakerName);  } }

3、创建Spring配置文件beanLearn04.xml。

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="https://www.springframework.org/schema/beans"  xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">    <!-- Learn 04 使用实例工厂方法实例化Bean -->  <!-- 定义实例工厂Bean -->  <bean id="speakerFactory" class="com.mahaochen.spring.learn04.SpeakerFactory" />  <!-- 使用实例工厂Bean创建Bean -->  <bean id="speaker04" class="com.mahaochen.spring.learn04.Speaker"   factory-bean="speakerFactory" factory-method="newInstance" >  </bean>  </beans>

4、将Spring配置文件beanLearn04.xml引入到主配置文件beans.xml中。

<!-- Learn 04  使用实例工厂方式实例化Bean -->  <import resource="com/mahaochen/spring/learn04/beanLearn04.xml"/>

5、 编写测试类TestSpring04.java。

public class TestSpring04 {   public static void main(String[] args) {   BeanFactory beanFactory = new ClassPathXmlApplicationContext("beans.xml");   //使用实例工厂方法实例化Bean   Speaker speaker04 = beanFactory.getBean("speaker04", Speaker.class);   speaker04.speech();  } }

【转载使用，请注明出处：https://blog.csdn.net/mahoking】