使用service&scope 进行注入

@service 声明该类为一个bean，bean的名称为类名首字母小写（customerService）

@Scope("prototype")则声明为一个原子类型，既每个getbean方法返回一个实例

package spring_service;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;

/**
 * Created by luozhitao on 2017/8/10.
 */
@Service
@Scope("prototype")
public class CustomerService {

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    private String message;

}

package spring_service;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * Created by luozhitao on 2017/8/10.
 */
public class service_app {

    public static void main(String [] args){

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

        CustomerService customerService=(CustomerService)context.getBean("customerService");

        customerService.setMessage("spring server method");

        System.out.println(customerService.getMessage());

    }

}

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:component-scan base-package="spring_service" />

</beans>

bean.xml看起来就非常简练。