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spring | 注入原理「简易版本」
source link: https://benpaodewoniu.github.io/2023/01/03/spring29/
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spring | 注入原理「简易版本」
例子来源于 spring | 什么是注入
spring5项目java 1.8
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.4.RELEASE</version>
</dependency>
基本原理还是使用反射。
<?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="person" class="com.rhino.Person">
<property name="id"> <!--name 指向属性名字-->
<value>10</value>
</property>
<property name="name">
<value>小明</value>
</property>
</bean>
</beans>
当 spring 检测到 bean 标签的时候，进行反射创建
<bean id="person" class="com.rhino.Person">- 等于
Person p = new Person()
- 等于
<property name="name"> <value>小明</value> </property>- 等于
p.setName("小明")
- 等于
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