学习记录

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四种：No,byName,byType,constructor

byName：

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"         default-autowire="byName"        >                <bean id="autoWiringService" class="com.imooc.autowiring.AutoWiringService" ></bean>                <bean id="autoWiringDAO" class="com.imooc.autowiring.AutoWiringDAO"></bean> </beans>

AutoWiringService.java

package com.imooc.autowiring;public class AutoWiringService {private AutoWiringDAO autoWiringDAO;public AutoWiringService(AutoWiringDAO autoWiringDAO) {System.out.println("AutoWiringService");this.autoWiringDAO = autoWiringDAO;}public void setAutoWiringDAO(AutoWiringDAO autoWiringDAO) {System.out.println("setAutoWiringDAO");this.autoWiringDAO = autoWiringDAO;}public void say(String word) {this.autoWiringDAO.say(word);}}

通过名字直接寻找对应的类装配

2.byType

上面蓝色部分对应来装配

3.constructor

在IOC容器中查找有无和构造方法传入参数的类型一致的Bean

上面紫色部分和XML蓝色部分

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