spring 源码解析——第一篇(ioc xml方式)

我不是女神ヾ 2021-09-21 00:38 273阅读 0赞

一、环境搭建

1.pom文件

<properties>
        
        <spring.version>4.0.2.RELEASE</spring.version>
        
        <mybatis.version>3.2.6</mybatis.version>
    </properties>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
    </dependencies>

2.xml配置：

<?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-3.1.xsd">
    
        <bean id="myTestBean" class="com.jd.xq.bean.MyTestBean"/>
    
    </beans>

3.代码

BeanFactory beanFactory=new XmlBeanFactory(new ClassPathResource("beanFactory.xml"));
    MyTestBean myTestBean=(MyTestBean) beanFactory.getBean("myTestBean");
    System.out.println(myTestBean.getName());

ApplicationContext applicationContext=new ClassPathXmlApplicationContext("beanFactory.xml");
    MyTestBean myTestBean=(MyTestBean) applicationContext.getBean("myTestBean");
    System.out.println(myTestBean.getName());

思考：

(1)读取xml文件，解析xml文件

(2)通过反射实例化类

UML类图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI5MTA1NQ_size_16_color_FFFFFF_t_70][]

参考：

[https://github.com/shiyujun/spring-framework][https_github.com_shiyujun_spring-framework]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzI5MTA1NQ_size_16_color_FFFFFF_t_70]: /images/20210920/45ff1866d0e14136895a204c1239b5b1.png
[https_github.com_shiyujun_spring-framework]: https://github.com/shiyujun/spring-framework