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对于复杂对象，bean 声明是可以继承的，下面是一个简单的例子。

package shangbo.spring.example42;public class Person {	protected String name;	protected int age;	public String getName() {		return name;	}	public void setName(String name) {		this.name = name;	}	public int getAge() {		return age;	}	public void setAge(int age) {		this.age = age;	}	public String toString() {		return "[name=" + name + ", age=" + age + "]";	}}

package shangbo.spring.example42;public class Student extends Person {	private String school;	public String getSchool() {		return school;	}	public void setSchool(String school) {		this.school = school;	}		public String toString() {		return "[school=" + name + ", age=" + age + ", school=" + school + "]";	}	}

package shangbo.spring.example42;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class App {    public static void main( String[] args )    {		// 实例化 Spring IoC 容器		ApplicationContext context = new ClassPathXmlApplicationContext("example.xml", Student.class);				// 从容器中获得 Person 对象		Person p = context.getBean("student", Person.class);				// 使用对象		System.out.println(p);    }}

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