Bean的作用域---singleton

1，Bean对象

package com.songyan.scope;

public class Bean4 {

}

2，配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="bean4" class="com.songyan.scope.Bean4" scope="singleton"></bean>
</beans>

3，测试类

package com.songyan.scope;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ScopeTest {
public static void main(String[] args) {
    ApplicationContext applicationContext=new ClassPathXmlApplicationContext("com/songyan/scope/Beans4.xml");
    Bean4 bean4=(Bean4)applicationContext.getBean("bean4");
    System.out.println(bean4);
    bean4=(Bean4)applicationContext.getBean("bean4");
    System.out.println(bean4);
}
}

4，结果

5，当作用域改为"prototype"

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="bean4" class="com.songyan.scope.Bean4" scope="prototype"></bean>
</beans>

6，输出结果