# 实验二 利用Spring boot的自动装配特性实现动态注册组件

**Repository Path**: y1ip/springboot-experiment-2

## Basic Information

- **Project Name**: 实验二 利用Spring boot的自动装配特性实现动态注册组件
- **Description**: No description available
- **Primary Language**: Java
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-10-25
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## <p align = "center"> **东莞理工学院网络空间安全学院**  </p>
#####  **课程名称** ：企业级开发框架专题</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**学期：2020秋季**   
  

`实验名称`：实验二 利用Spring boot的自动装配特性实现动态注册组件&emsp;&nbsp;&nbsp;&nbsp;`实验序号`：二<br>
`姓名`：叶薰馥 &nbsp;&nbsp;&nbsp;&nbsp;`学号`：201841413237&nbsp;&nbsp;&nbsp;&nbsp;`班级`：18网工2班 <br> 
`实验地址`：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`实验日期`：2020-10-19&nbsp;&nbsp;&nbsp;&nbsp;`同组同学`：无 <br>
`指导老师`：黎志雄 &nbsp;&nbsp; `教师评语`：&nbsp;&nbsp;&nbsp;&nbsp;`实验成绩`：&nbsp;&nbsp;&nbsp;&nbsp;

# 实验二 利用Spring boot的自动装配特性实现动态注册组件


#### 一、实验目的

1、 掌握Spring Boot的自动配置原理；<br>
2、 掌握Spring框架动态注册Bean的原理；<br>
3、 掌握自动生成元数据文件。<br>
4、 掌握spring框架的事件模型。<br>

#### 二、实验环境

1、 JDK 1.8或更高版本  
2、 Maven 3.6+  
3、 IntelliJ IDEA  

#### 三、实验任务
1、通过IntelliJ IDEA的Spring Initializr向导创建Spring Boot项目；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/230325_77b524b9_8167141.png"/>
</div>
<p align=center >创建项目</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/230417_51399b30_8167141.png"/>
</div>
<p align=center >添加 Spring Configuration Processor 依赖</p>
<br>

2、创建一个自定义的CommandLineRunner接口的实现类；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/230602_31d7eae1_8167141.png"/>
</div>
<p align=center >创建CustomCommandLineRunner类，实现CommandLineRunner</p>
<br>

3、创建一个自定义的自动配置类；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/230910_16f6aa79_8167141.png"/>
</div>
<p align=center >创建AutoConfig自动配置类</p>
<br>

4、创建spring.factories文件；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231205_c7c19d92_8167141.png"/>
</div>
<p align=center >创建spring.factories文件，并指定它的值为刚才自定义的自动配置类的全限定类路径的类名</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231411_372a58dd_8167141.png"/>
</div>
<p align=center >测试运行程序，运行结果显示我们自定义的自动配置类已经生效</p>
<br>

5、给自动配置类添加有效条件；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231545_543defda_8167141.png"/>
</div>
<p align=center >利用@ConditionalOnProperty注解，添加属性条件</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231649_c52a2fbe_8167141.png"/>
</div>
<p align=center >在application.properties属性文件中添加一个自定义的属性</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231740_5645385d_8167141.png"/>
</div>
<p align=center >切换属性值为true，自动装配的配置类生效</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231844_a156164d_8167141.png"/>
</div>
<p align=center >切换属性值为false，自动装配的配置类失效</p>
<br>

6、自定义的一个Bean，绑定属性值，并生成spring配置类的元数据文件；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/231941_331073c1_8167141.png"/>
</div>
<p align=center >创建一个CustomProperties类，并在类上加@ConfigurationProperties注解，设置注解的prefix属性指定绑定的属性的前缀。</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/232128_0cfe243a_8167141.png"/>
</div>
<p align=center >在AutoConfig配置类上添加@EnableConfigurationProperties，并指定装配的属性Bean。</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/232332_495e06fa_8167141.png"/>
</div>
<p align=center >编译打包项目。观察target目录下的元数据文件</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/232422_4f9dfb8e_8167141.png"/>
</div>
<p align=center >回去编辑属性文件时，只要输入属性的部分关键字，idea会自动提示</p>
<br>

7、根据阅读框架源码，我们可以自定义一个事件发布器，并设置线程池，实现异步发布事件；
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/232909_8f37e13d_8167141.png"/>
</div>
<p align=center >自定义的事件发布器</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/232953_3b690e19_8167141.png"/>
</div>
<p align=center >自定义事件类</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/233022_bfa99822_8167141.png"/>
</div>
<p align=center >自定义事件监听器</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/233118_45f5091d_8167141.png"/>
</div>
<p align=center >编写一个测试用例，检查发布事件时，是否使用了多线程异步处理</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/233209_ca575b43_8167141.png"/>
</div>
<p align=center >运行单元测试结果，显示成功使用了多线程异步处理</p>
<br>

8、自定义 ApplicationReadyEvent 的事件监听器。
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/233345_5cec44c8_8167141.png"/>
</div>
<p align=center >自定义一个ApplicationReadyEvent的事件监听器</p>
<br>
<div align=center>
    <img width = '50%' height ='50%' src ="https://images.gitee.com/uploads/images/2020/1025/233418_66ba58a5_8167141.png"/>
</div>
<p align=center >终端显示输出的指定信息是在CommandLineRunner的输出信息之后</p>
<br>