求解，关于spring装载bean时单例的疑惑

[tragedy]

程序如下
------------------------------------------------------------------------------------
public class Mother {

public Mother(){

System.out.println("Mother object has been instance");

}

}

--------------------------------------------------------------------------------------
public class People {

private Mother mother;

public People(){

System.out.println("People Object has been instance");

}

public static int sum = 0;

public void sayHello(){
System.out.println(sum);
sum ++;
}

public void setMother(Mother mother){

this.mother = mother;

}

}
-------------------------------------------------------------------

public static void main(String[] args){

ApplicationContext context = new ClassPathXmlApplicationContext("apptest.xml");

People people = (People)context.getBean("people");
people.sayHello();

ApplicationContext context2 = new FileSystemXmlApplicationContext("D://tempSpace//springPro//bin//apptest.xml");
people = (People)context2.getBean("people");
people.sayHello();
}

---------------------------------------------------------------------


<beans>

<bean id="people" class="com.springinaction.chapter02.applicationcontext.People" >
<property name="mother">
<ref bean="mother"/>
</property>
</bean>

<bean id="mother" class="com.springinaction.chapter02.applicationcontext.Mother" />

</beans>

-----------------------------------------------------------------
输出结果为：
People Object has been instance
Mother object has been instance
0
People Object has been instance
Mother object has been instance
1

我的问题是：
1.bean默认为单例，为什么不同的context装载会出现两次new的情况呢？
2.如果不同context装载是产生多个实例，那么为什么People的静态变量int会是不同的值？，不是应该都是0吗？

[liufeng0209]

你有2个ApplicationContext吧

[sustbeckham]

单例是在单容器下说的 你这启动了2个app。
ApplicationContext context = new ClassPathXmlApplicationContext("apptest.xml");

People people = (People)context.getBean("people");
people.sayHello();

ApplicationContext context2 = new FileSystemXmlApplicationContext("D://tempSpace//springPro//bin//apptest.xml");
people = (People)context2.getBean("people");
people.sayHello();

[tragedy]

对的，是有两个app，那么多个实例是可以理解的，但是为什么静态变量是累加，而不是都是0呢？打印的结果应该是
People Object has been instance
Mother object has been instance
0
People Object has been instance
Mother object has been instance
0

[liufeng0209]

静态是静态,单例是单例
静态变量是跟随class的,与类无关,无论你建立了几个object,静态变量还是一个.