spring源码解析--基础容器XmlBeanFactory 加载过程

青旅半醒 2022-05-23 02:56 255阅读 0赞

# 一、demo示例 #

## 1、实体类 ##

package cn.jin.test;
    
    public class MyTestBean {
    	
    	private String str = "this is test";
    
    	public String getStr() {
    		return str;
    	}
    
    	public void setStr(String str) {
    		this.str = str;
    	}
    	
    }

## 2、配置beanFactoryTest.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"
    	xmlns:p="http://www.springframework.org/schema/p"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
        <bean id="testBean" class="cn.jin.test.MyTestBean"></bean>
    </beans>

## 3、读取 ##

@SuppressWarnings("deprecation")
    	public static void main(String[] args) {
    		XmlBeanFactory xmlBean = new XmlBeanFactory(new ClassPathResource("beanFactoryTest.xml"));
    		MyTestBean bean = (MyTestBean)xmlBean.getBean("testBean");
    		System.out.println(bean.getStr());
    		//SpringApplication.run(Application.class, args);
    	}

# 二、读取配置文件解析 #

## 1、封装资源文件 ##

在读取到这个类XmlBeanDefinitionReader对参数编码，如果设置编码，spring会使用相应的编码作为输出流的编码

![70][]

## 2、获取输入流并构造InputSource ##

![70 1][]

## 3、调用函数doLoadBeanDefinitions核心部分 ##

![70 2][]

## 4、注册Bean，然后返回注册的条数 ##

![70 3][]

## 5、把source转成XmlBeanFactory ##

![70 4][]

[70]: /images/20220523/31a1df0ed0f04be4b8ed780fa6effe49.png
[70 1]: /images/20220523/b5b5bd2c018741b8854b6eab08c20088.png
[70 2]: /images/20220523/72d6a3bdefca47a39a6b4c79de8a815b.png
[70 3]: /images/20220523/784fe6d0198d4a5b9e8dd25375014f8e.png
[70 4]: /images/20220523/25832ff972514a4496396212dde417b0.png