Spring 初试 对象数组，LIST,SET

如一个类中包含另一个类的数组,LIST,SET,MAP 在Spring中配置会是怎样呢？例子如下

一个Stu类
public class Stu {
private String stuName;
private Integer stuAge;
public Integer getStuAge() {
    return stuAge;
}
public void setStuAge(Integer stuAge) {
    this.stuAge = stuAge;
}
public String getStuName() {
    return stuName;
}
public void setStuName(String stuName) {
    this.stuName = stuName;
}
}
//一个USER类
public class User {
private String userName;
private Integer age;
private Stu[] stus1;
private List stus2;
private Set stus3;
private Map stus4;
public Integer getAge() {
    return age;
}
public void setAge(Integer age) {
    this.age = age;
}
public String getUserName() {
    return userName;
}
public void setUserName(String userName) {
    this.userName = userName;
}
public Stu[] getStus1() {
    return stus1;
}
public void setStus1(Stu[] stus1) {
    this.stus1 = stus1;
}
public List getStus2() {
    return stus2;
}
public void setStus2(List stus2) {
    this.stus2 = stus2;
}
public Set getStus3() {
    return stus3;
}
public void setStus3(Set stus3) {
    this.stus3 = stus3;
}
public Map getStus4() {
    return stus4;
}
public void setStus4(Map stus4) {
    this.stus4 = stus4;
}

}
//spring配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>

<bean id="astu" class="org.nieweiguo.Stu" abstract="false"
    singleton="true" lazy-init="default" autowire="constructor"
    dependency-check="default">
    <property name="stuName">
     <value>阿猫</value>
    </property>
    <property name="stuAge">
     <value>18</value>
    </property>
</bean>
<bean id="astu2" class="org.nieweiguo.Stu" abstract="false"
    singleton="true" lazy-init="default" autowire="constructor"
    dependency-check="default">
    <property name="stuName">
     <value>阿狗</value>
    </property>
    <property name="stuAge">
     <value>28</value>
    </property>
</bean>

<bean id="user" class="org.nieweiguo.User" abstract="false"
    singleton="true" lazy-init="default" autowire="constructor"
    dependency-check="default">
    <property name="userName">
     <value>nieweiguo</value>
    </property>
    <property name="age">
     <value>25</value>
    </property>
    <property name="stus1">
     <list>
      <ref bean="astu" />
      <ref bean="astu" />
      <ref bean="astu" />
     </list>
    </property>
    <property name="stus2">
     <list>
      <ref bean="astu2" />
      <ref bean="astu2" />
      <ref bean="astu2" />
     </list>
    </property>
    <property name="stus3">
     <set>
      <ref bean="astu" />
      <ref bean="astu2" />
     </set>
    </property>
    <property name="stus4">
     <map>
      <entry key="stu1">
       <ref bean="astu" />
      </entry>
      <entry key="stu2">
       <ref bean="astu2" />
      </entry>
     </map>
   
    </property>
</bean>
</beans>
//TEST类
public class testSpring {
/**
    * @param args
    */
public static void main(String[] args) {
    ApplicationContext context =new FileSystemXmlApplicationContext("src/applicationContext.xml");
    User user=(User)context.getBean("user");
//对象数组得到显示
    Stu[] stus1=(Stu[])user.getStus1();
    for(int i=0;i<stus1.length;i++)
    {
     System.out.println(stus1.getStuName());
    }
    //LIST得到显示
    List stus2=user.getStus2();
    for(int i=0;i<stus2.size();i++)
    {
     System.out.println(((Stu)stus2.get(i)).getStuName());
    }
    //Set 得到显示
    Set stus3=user.getStus3();
    Object stuso3[]=(Object[])stus3.toArray();
    for(int i=0;i<stuso3.length;i++)
    {
     Stu a=(Stu)stuso3;
     System.out.println(a.getStuName());
    }
    //Map得到显示
    Map stus4=user.getStus4();
    Stu a=(Stu)stus4.get("stu1");
    Stu b=(Stu)stus4.get("stu2");
    System.out.println(a.getStuName()+"aaaa");
    System.out.println(a.getStuName()+"bbb");
  
}
}
输出结果如下：
log4j:WARN No appenders could be found for logger (org.springframework.core.CollectionFactory).
log4j:WARN Please initialize the log4j system properly.
阿猫
阿猫
阿猫
阿狗
阿狗
阿狗
阿猫
阿狗
阿猫aaaa
阿猫bbb

还可以定义一个类的 初始化方法。
<bean id="user" class="org.nieweiguo.User" abstract="false"
   singleton="true" lazy-init="default" autowire="constructor"
   dependency-check="default" init-method="init">
</bean>
在类中 可以这样写 
public void init()
{
   this.userName="anie";
   this.age=25;
}