Spring Boot 源码阅读初始化环境搭建

红太狼 2024-03-25 21:29 57阅读 0赞

在开始源码阅读之前，我们要有一个统一的Spring Boot 版本，不同的版本源码会略有差别，先搭建一个简易的SSM环境用于测试，这边简单的记录一下，阅读我专栏的读者可以下载我使用的Demo环境：

> demo环境地址：https://github.com/jujunchen/Spring-Boot-Demo.git

版本统一：

工具：IDEA
    
    JDK：jdk11
    
    Spring Boot 版本：3.1.0
    
    Mybatis Plus 版本：3.5.2

使用 `Spring Initializr` 创建一个项目

项目`pom.xml`文件如下

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>3.1.0</version>
            <relativePath/> 
        </parent>
    
        <groupId>com.springboot</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>Spring-Boot-Demo</name>
        <description>Spring-Boot-Demo</description>
    
        <properties>
            <java.version>11</java.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <optional>true</optional>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            <dependency>
                <groupId>com.h2database</groupId>
                <artifactId>h2</artifactId>
                <scope>runtime</scope>
            </dependency>
    
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>3.5.2</version>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <excludes>
                            <exclude>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                            </exclude>
                        </excludes>
                    </configuration>
                </plugin>
            </plugins>
        </build>
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </repository>
            <repository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
                <snapshots>
                    <enabled>false</enabled>
                </snapshots>
            </pluginRepository>
            <pluginRepository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/snapshot</url>
                <releases>
                    <enabled>false</enabled>
                </releases>
            </pluginRepository>
        </pluginRepositories>
    
    </project>

`application.yml`文件配置如下

# Mysql数据库
    spring:
      datasource:
        driver-class-name: org.h2.Driver
        url: jdbc:h2:./spring-boot-demo
        username: root
        password: 123456

启动项目，打印出如下日志

2023-06-16T13:29:22.124+08:00  INFO 23093 --- [  restartedMain] o.s.boot.SpringApplication               : 
      /$$$$$$   /$$$$$$  /$$$$$$$  /$$   /$$       /$$$$$$ /$$$$$$$$ /$$$$$$   /$$$$$$  /$$     /$$ /$$$$$$   /$$$$$$  /$$     /$$
     /$$__  $$ /$$__  $$| $$__  $$| $$$ | $$      |_  $$_/|__  $$__//$$__  $$ /$$__  $$|  $$   /$$//$$__  $$ /$$__  $$|  $$   /$$/
    | $$  \__/| $$  \__/| $$  \ $$| $$$$| $$        | $$     | $$  | $$  \__/| $$  \ $$ \  $$ /$$/| $$  \__/| $$  \ $$ \  $$ /$$/
    | $$      |  $$$$$$ | $$  | $$| $$ $$ $$ /$$$$$$| $$     | $$  |  $$$$$$ | $$$$$$$$  \  $$$$/ |  $$$$$$ | $$$$$$$$  \  $$$$/
    | $$       \____  $$| $$  | $$| $$  $$$$|______/| $$     | $$   \____  $$| $$__  $$   \  $$/   \____  $$| $$__  $$   \  $$/
    | $$    $$ /$$  \ $$| $$  | $$| $$\  $$$        | $$     | $$   /$$  \ $$| $$  | $$    | $$    /$$  \ $$| $$  | $$    | $$
    |  $$$$$$/|  $$$$$$/| $$$$$$$/| $$ \  $$       /$$$$$$   | $$  |  $$$$$$/| $$  | $$    | $$   |  $$$$$$/| $$  | $$    | $$
     \______/  \______/ |_______/ |__/  \__/      |______/   |__/   \______/ |__/  |__/    |__/    \______/ |__/  |__/    |__/
    
    ::Spring Boot Version:  (v3.1.0)

环境能正常启动后，就可以开始阅读源码了。  
有时候只是看最新的源码我们只能知道现在是怎么样的，但不知道为什么会演变成这样，比如有的类Spring Boot 2.X版本中有，3.X没有了，项目作者是怎么考虑的，这些就需要下载Spring Boot 的项目看Git提交记录。

> Spring Boot 项目地址：https://github.com/spring-projects/spring-boot

--------------------

> 作者其他要推荐的文章，欢迎来学习：  
> Prometheus 系列文章
> 
> 1.  [Prometheus 的介绍和安装][Prometheus]
> 2.  [直观感受PromQL及其数据类型][PromQL]
> 3.  [PromQL之选择器和运算符][PromQL 1]
> 4.  [PromQL之函数][PromQL 2]
> 5.  [Prometheus 告警机制介绍及命令解读][Prometheus 1]
> 6.  [Prometheus 告警模块配置深度解析][Prometheus 2]
> 7.  [Prometheus 配置身份认证][Prometheus 3]
> 8.  [Prometheus 动态拉取监控服务][Prometheus 4]
> 9.  [Prometheus 监控云Mysql和自建Mysql][Prometheus _Mysql_Mysql]
> 
> --------------------
> 
> Grafana 系列文章，版本：OOS v9.3.1
> 
> 1.  [Grafana 的介绍和安装][Grafana]
> 2.  [Grafana监控大屏配置参数介绍（一）][Grafana 1]
> 3.  [Grafana监控大屏配置参数介绍（二）][Grafana 2]
> 4.  [Grafana监控大屏可视化图表][Grafana 3]
> 5.  [Grafana 查询数据和转换数据][Grafana 4]
> 6.  [Grafana 告警模块介绍][Grafana 5]
> 7.  [Grafana 告警接入飞书通知][Grafana 6]
> 
> --------------------
> 
> Spring Boot Admin 系列
> 
> 1.  [Spring Boot Admin 参考指南][Spring Boot Admin]
> 2.  [SpringBoot Admin服务离线、不显示健康信息的问题][SpringBoot Admin]
> 3.  [Spring Boot Admin2 @EnableAdminServer的加载][Spring Boot Admin2 _EnableAdminServer]
> 4.  [Spring Boot Admin2 AdminServerAutoConfiguration详解][Spring Boot Admin2 AdminServerAutoConfiguration]
> 5.  [Spring Boot Admin2 实例状态监控详解][Spring Boot Admin2]
> 6.  [Spring Boot Admin2 自定义JVM监控通知][Spring Boot Admin2 _JVM]
> 7.  [Spring Boot Admin2 自定义异常监控][Spring Boot Admin2 1]
> 8.  [Spring Boot Admin 监控指标接入Grafana可视化][Spring Boot Admin _Grafana]

[Prometheus]: https://itsaysay.blog.csdn.net/article/details/128993876
[PromQL]: https://itsaysay.blog.csdn.net/article/details/128697766
[PromQL 1]: https://itsaysay.blog.csdn.net/article/details/128725788
[PromQL 2]: https://itsaysay.blog.csdn.net/article/details/128734102
[Prometheus 1]: https://itsaysay.blog.csdn.net/article/details/129035181
[Prometheus 2]: https://itsaysay.blog.csdn.net/article/details/129115894
[Prometheus 3]: https://itsaysay.blog.csdn.net/article/details/128741317
[Prometheus 4]: https://itsaysay.blog.csdn.net/article/details/128748383
[Prometheus _Mysql_Mysql]: https://itsaysay.blog.csdn.net/article/details/129248268
[Grafana]: https://itsaysay.blog.csdn.net/article/details/128260639
[Grafana 1]: https://itsaysay.blog.csdn.net/article/details/128280232
[Grafana 2]: https://blog.csdn.net/weixin_40972073/article/details/128292597
[Grafana 3]: https://itsaysay.blog.csdn.net/article/details/128309734
[Grafana 4]: https://itsaysay.blog.csdn.net/article/details/128379173
[Grafana 5]: https://itsaysay.blog.csdn.net/article/details/128586826
[Grafana 6]: https://itsaysay.blog.csdn.net/article/details/128665497
[Spring Boot Admin]: https://itsaysay.blog.csdn.net/article/details/125567451
[SpringBoot Admin]: https://itsaysay.blog.csdn.net/article/details/125302909
[Spring Boot Admin2 _EnableAdminServer]: https://itsaysay.blog.csdn.net/article/details/127986764
[Spring Boot Admin2 AdminServerAutoConfiguration]: https://itsaysay.blog.csdn.net/article/details/127990150
[Spring Boot Admin2]: https://itsaysay.blog.csdn.net/article/details/127992400
[Spring Boot Admin2 _JVM]: https://itsaysay.blog.csdn.net/article/details/128029153
[Spring Boot Admin2 1]: https://itsaysay.blog.csdn.net/article/details/128046695?spm=1001.2014.3001.5502
[Spring Boot Admin _Grafana]: https://itsaysay.blog.csdn.net/article/details/128089324?spm=1001.2014.3001.5502