为了提高可重用性和最小化开发工作量，spring支持bean定义继承。
下面的示例代码解释了该过程。在java配置文件中写入

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class AppConfig {
    @Bean
    public Employee employee() {
        Employee employee = new Employee();
        initCompany(employee);
        employee.setLocation("XYZ");
        return employee;
    }
    private void initCompany(Company company) {
        company.setName("abc");
        company.setAge(30);
    }
}

在主类中运行write

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class SpringDemo {

    public static void main(String[] args) {

        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
        ctx.register(AppConfig.class);
        ctx.refresh();
        Employee employee = ctx.getBean(Employee.class);
        System.out.println(employee.getName());
        System.out.println(employee.getLocation());
        System.out.println(employee.getAge());
            ctx.registerShutdownHook();
    }
} 

Output

abc 
  XYZ
  30