Spring基础(3) : 静态工厂和实例工厂创建bean

public class Factory {
    public static Person staticCreate(){
        Person p = new Person();
        p.name="staticCreate";
        return p;
    }

    public Person instanceCreate(){
        Person p = new Person();
        p.name="instanceCreate";
        return p;
    }
}

  public static void main(String[] args){
        ApplicationContext context = new ClassPathXmlApplicationContext("a.xml");
        Person p1 = context.getBean("p1",Person.class);
        Person p2 =context.getBean("p2",Person.class);
        System.out.println(p1.getName()+" "+p2.getName());
    }


   配置：
    <bean id="p1" class="com.Factory" factory-method="staticCreate"/>
    <bean id="fac" class="com.Factory"/>
    <bean id="p2" factory-bean="fac" factory-method="instanceCreate"/>

通过工厂创建bean。

 

运行打印：

staticCreate instanceCreate

 

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注解方式：

@Configuration
public class Factory {
    @Bean("p1")
    public static Person staticCreate(){
        Person p = new Person();
        p.name="staticCreate";
        return p;
    }
    @Bean("p2")
    public Person instanceCreate(){
        Person p = new Person();
        p.name="instanceCreate";
        return p;
    }
}

 public static void main(String[] args){
        ApplicationContext context = new AnnotationConfigApplicationContext(Factory.class);
        Person p1 = context.getBean("p1",Person.class);
        Person p2 = context.getBean("p2",Person.class);
        System.out.println(p1.getName());
        System.out.println(p2.getName());
    }

输出：

staticCreate
instanceCreate