自动装配注入与集合装配注入

自动装配注入特征

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关键词 autowire

applicationContext.xml

<?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 class="dang.dao.impl.BookDaoImpl"/>
    <!--autowire属性：开启自动装配，通常使用按类型装配-->
    <bean id="bookService" class="dang.service.impl.BookServiceImpl" autowire="byType"/>

</beans>

---

集合装配注入

applicationContext.xml

<?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="bookDao" class="dang.dao.impl.BookDaoImpl">
        <!--数组注入-->
        <property name="array">
            <array>
                <value>100</value>
                <value>200</value>
                <value>300</value>
            </array>
        </property>
        <!--list集合注入-->
        <property name="list">
            <list>
                <value>itcast</value>
                <value>itheima</value>
                <value>boxuegu</value>
                <value>chuanzhihui</value>
            </list>
        </property>
        <!--set集合注入-->
        <property name="set">
            <set>
                <value>itcast</value>
                <value>itheima</value>
                <value>boxuegu</value>
                <value>boxuegu</value>
            </set>
        </property>
        <!--map集合注入-->
        <property name="map">
            <map>
                <entry key="country" value="china"/>
                <entry key="province" value="henan"/>
                <entry key="city" value="kaifeng"/>
            </map>
        </property>
        <!--Properties注入-->
        <property name="properties">
            <props>
                <prop key="country">china</prop>
                <prop key="province">henan</prop>
                <prop key="city">kaifeng</prop>
            </props>
        </property>
    </bean>
</beans>