AutoWire and AutoWire)

AutoWire and AutoWire)

Select an Assembly policy based on autowire Configuration

ByName: select the bean with the same name as the property name for assembly;

ByType is selected based on the type. If the corresponding type matches multiple beans, an error is returned, as shown in the following Configuration:

 1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4        xsi:schemaLocation="http://www.springframework.org/schema/beans 5            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 6  7   <bean name="userDAO1" class="com.bjsxt.dao.impl.UserDAOImpl"> 8       <property name="daoId" value="1"></property> 9   </bean>10   11   <bean name="userDAO2" class="com.bjsxt.dao.impl.UserDAOImpl">12       <property name="daoId" value="2"></property>13   </bean>14 15   <bean id="userService" class="com.bjsxt.service.UserService" scope="singleton" autowire="byType">16       <!-- <property name="userDAO">17           <ref bean="userDAO1"/>18       </property> -->19   </bean>20   21 </beans>

Error:

You can also configure the Assembly policy of the entire configuration file under the beans label. The values in the configuration file are the same.

Code link: http://pan.baidu.com/s/1slPPUzz password: 1d9e

Jar package link: http://pan.baidu.com/s/1pKAKAQB password: fjc3