Spring 使用静态工厂方式实例化Bean

操作步骤：
1、创建Speaker对象。

/**  * 静态工厂类  *  */ public class Speaker {   private String name ;  private String topic;  private int timeHour;    private static Speaker speaker = null;    private Speaker() {    this.name = "Jacke";   this.topic = "play football!";   this.timeHour = 2;       }    /**   * 工厂方法   * @return   */  public static Speaker getInstance() {    if(null==speaker){    speaker = new Speaker();   }   return speaker;  }    /**   * 演讲   */  public void speech() {   System.out.println(toString());  }    @Override  public String toString() {   return "Speaker [name=" + name + ", topic=" + topic + ", timeHour="     + timeHour + "]";  } }

2、创建Spring配置文件beanLearn03.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 03使用静态工厂方式实例化Bean -->  <!--使用有参数构造参数-->   <bean id="speaker03" class="com.mahaochen.spring.learn03.Speaker" factory-method="getInstance">  </bean>  </beans>

3、将Spring配置文件beanLearn03.xml引入到主配置文件beans.xml中。

<!-- Learn 03  使用静态工厂方式实例化Bean -->  <import resource="com/mahaochen/spring/learn03/beanLearn03.xml"/>

4、编写测试类TestSpring03.java。

public class TestSpring03 {   public static void main(String[] args) {   BeanFactory beanFactory = new ClassPathXmlApplicationContext("beans.xml");   //使用静态工厂方式实例化Bean   Speaker speaker03 = beanFactory.getBean("speaker03", Speaker.class);   speaker03.speech();  } }

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