Spring基础(2)：bean顺序创建

public class Person{
    public Person(){
        System.out.println("Person person person ...");
    }
}

public class Leader {
    public Leader(){
        System.out.println("leader leader leader ...");
    }
}

public class Group {
    public Group(){
        System.out.println("Group group...");
    }
}

public class Main {
    public static void main(String[] args){
        ApplicationContext context = new ClassPathXmlApplicationContext("a.xml");
    }
}


 <bean id="p" class="com.Person" />
    <bean id="leader" class="com.Leader" depends-on="p"/>
    <bean id="grouop" class="com.Group" depends-on="leader"/>

打印：

Person person person ...
leader leader leader ...
Group group...

使用depends-on可以设置bean依赖，只有depends-on列表中的bean才会被创建。