spring 自动装配 一、spring 自动装配 default-autowire="byName" byName,按变量名称,与id名称一样,若不一样,就报错。 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" default-autowire="byName"> <bean id="bean1" class="com.zd.bean.Bean1" > <!-- 配了default-autowire="byName" ,可以注释 <property name="bean2"> <ref bean="bean2" /> </property> <property name="bean3" ref="bean3" /> <property name="bean4"> <bean class="com.zd.bean.Bean4"> <property name="age" value="16" /> </bean> </property> --> </bean> 二、spring 自动装配 default-autowire="byType" byType,按类型自动装配,若变量与id不匹配,也没关系 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" default-autowire="byName"> <bean id="bean1" class="com.zd.bean.Bean1" > <!-- 配了default-autowire="byType" ,可以注释 <property name="bean2"> <ref bean="bean2" /> </property> <property name="bean3" ref="bean3" /> <property name="bean4"> <bean class="com.zd.bean.Bean4"> <property name="age" value="16" /> </bean> </property> --> </bean> 三、默认配置是no,推荐用这种,因以上自动装配,对维护不是太好。 </pre><br> <br> <pre></pre>