Spring案例打印机的实现过程详解

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd">
  <!--注入bean
    id相当于当前bean唯一标识
    class是bean 的全路径
    property注入bean中的属性     必须封装
  -->
  <!--注入墨盒-->
  <bean id="colorInk" class="cn.spring.print.ink.ColorInk"></bean>
  <bean id="blackWhiteInk" class="cn.spring.print.ink.BlackWhiteInk"></bean>
  <!--注入纸张-->
  <bean id="a4Paper" class="cn.spring.print.paper.A4Paper"></bean>
  <bean id="b5Paper" class="cn.spring.print.paper.B5Paper"></bean>
  <!--打印机-->
  <bean id="printer" class="cn.spring.print.printer.Printer">
    <!--将墨盒纸张组合起来-->
    <property name="paper" ref="b5Paper"></property>
    <property name="ink" ref="colorInk"></property>
  </bean>
</beans>