测试spring是单例模式

阳光穿透心脏的1/2处 2021-09-18 07:48 237阅读 0赞

spring默认为singleton，在scope中配置

package com.zpc.tet.SchedulTest;
    
    /**
     * @Author timor
     * @Date 2019/2/26
     */
    public class Apple {
        private String name;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    }

package com.zpc.tet.SchedulTest;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Scope;
    
    /**
     * @Author timor
     * @Date 2019/2/26
     */
    public class MyBean {
        @Bean(name = "getName")
        @Scope("prototype")
        public Apple getName(){
            Apple apple = new Apple();
            apple.setName("appleName");
            System.out.println("getName()");
            return apple;
        }
    }

package com.zpc.tet.SchedulTest;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.AnnotationConfigApplicationContext;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.Scope;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import java.util.Date;
    
    /**
     * @Author timor
     * @Date 2019/2/26
     */
    @Configuration
    public class BeanTest {
    
    
        public static void main(String[] args) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
    
            ApplicationContext context = new AnnotationConfigApplicationContext(MyBean.class);
            Apple apple = (Apple) context.getBean("getName");
            Apple apple2 = (Apple) context.getBean("getName");
            System.out.println(apple == apple2);
    
            
        }
    }

结果为：true