spring--Scope

 spring  之 Scope

Scope有两个值：singleton(默认)  prototype

                             singleton是单例的

                             prototype是非单例的

   

如：

   Person.java

package com;

public class Person {
  
}

//applicationContext.xml
<?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="p" class="com.Person" scope="singleton"></bean> -->
 <bean id="p" class="com.Person" scope="prototype"></bean> 
</beans>

测试：

package com;

import org.junit.Test;

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

import com.factory.BeanFactory;

public class TestDemo {

    @Test
    public void test01() {
        //启动spring容器，读取src下applicationContext.xml文件
       ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
       //调用spring容器创建对象
       Person p1 = (Person) ac.getBean("p");
       Person p2 = (Person) ac.getBean("p");
       Person p3 = (Person) ac.getBean("p");
       System.out.println(p1);
       System.out.println(p2);
       System.out.println(p3);
    }
    
    
}

如果scope=“prototype”

结果：

 

如果scope=“singleton”

结果：