[Spirng]4.c命名空间和p命名空间
作者:互联网
摘自官网:https://docs.spring.io/spring-framework/docs/current/reference/html/core.html#beans-p-namespace
p命名空间
p命名空间可以使用bean的属性,而不是嵌套的property来进行注入。优化了set注入。
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--正常set注入-->
<bean name="john-classic" class="com.example.Person">
<property name="name" value="John Doe"/>
<property name="spouse" ref="jane"/>
</bean>
<!--p命名空间注入-->
<bean name="john-modern"
class="com.example.Person"
p:name="John Doe"
p:spouse-ref="jane"/>
<bean name="jane" class="com.example.Person">
<property name="name" value="Jane Doe"/>
</bean>
</beans>
注意添加 xmlns:p="http://www.springframework.org/schema/p"
c命名空间
c命名空间用于优化构造器注入
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:c="http://www.springframework.org/schema/c"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="beanTwo" class="x.y.ThingTwo"/>
<bean id="beanThree" class="x.y.ThingThree"/>
<!-- 传统的由参数名注入 -->
<bean id="beanOne" class="x.y.ThingOne">
<constructor-arg name="thingTwo" ref="beanTwo"/>
<constructor-arg name="thingThree" ref="beanThree"/>
<constructor-arg name="email" value="something@somewhere.com"/>
</bean>
<!--c命名空间注入-->
<bean id="beanOne" class="x.y.ThingOne" c:thingTwo-ref="beanTwo"
c:thingThree-ref="beanThree" c:email="something@somewhere.com"/>
</beans>
注意添加 xmlns:c="http://www.springframework.org/schema/c"
标签:www,Spirng,spring,空间,html,命名,schema 来源: https://www.cnblogs.com/xzjava/p/15593579.html