基于XML的DI-异类抽象Bean

Love The Way You Lie 2023-10-17 12:07 1阅读 0赞

## Spring基于XML的DI-异类抽象Bean ##

**看一段配置**

<?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">
        <bean id="xiaoming" class="com.hk.spring.di12.Student">
            <property name="name" value="小明"/>
            <property name="age" value="18"/>
            <property name="school" value="九江学院"/>
            <property name="department" value="计算机科学与技术学院"/>
        </bean>
    
        <bean id="teacher" class="com.hk.spring.di12.Teacher">
            <property name="name" value="Mike"/>
            <property name="workAge" value="8"/>
            <property name="school" value="九江学院"/>
            <property name="department" value="计算机科学与技术学院"/>
        </bean>
    
    </beans>

**发现有冗余，不过类不一样，优化**

### 优化 ###

<?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">
         
         <bean id="baseBean" abstract="true">
            <property name="school" value="九江学院"/>
            <property name="department" value="计算机科学与技术学院"/>
         </bean>
        <bean id="xiaoming"  class="com.hk.spring.di12.Student" parent="baseBean">
            <property name="name" value="小明"/>
            <property name="age" value="18"/>
        </bean>
    
        <bean id="teacher" class="com.hk.spring.di12.Teacher" parent="baseBean">
            <property name="name" value="Mike"/>
            <property name="workAge" value="8"/>
        </bean>
    
    </beans>