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入门案例之向导版
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Spring Boot是由Pivotal团队开发的全新框架，意在简化Spring应用程序的初始搭建和开发过程。

1 创建项目

IDEA
    新建项目
        空项目
            项目名称：springboot

IDEA
    文件
        项目结构...
            模块
                +新建模块
                    Spring Initializr
                        名称：springboot_01_01_quickstart
                        组：cn.tedu
                        软件包名称：cn.tedu.springboot
                    依赖项
                        Web
                            Spring Web

2 REST风格控制器

在/src/main/java/cn/tedu/springboot/controller目录下创建BookController.java文件：

@RestController
@RequestMapping("/books")
public class BookController {
    @GetMapping
    public String getBooks() {
        System.out.println("Spring Boot is running ...");
        return "Spring Boot is running ...";
    }
}

3 运行

Springboot0101QuickstartApplication右键
    运行

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.6.4)

2022-03-03 13:43:43.786  INFO 56996 --- [           main] .t.s.Springboot0101QuickstartApplication : Starting Springboot0101QuickstartApplication using Java 16.0.2 on VOYO-MINWEI with PID 56996 (C:\Users\Administrator\Projects\SpringBoot\code\springboot\springboot_01_01_quickstart\target\classes started by Administrator in C:\Users\Administrator\Projects\SpringBoot\code\springboot)
2022-03-03 13:43:43.789  INFO 56996 --- [           main] .t.s.Springboot0101QuickstartApplication : No active profile set, falling back to 1 default profile: "default"
2022-03-03 13:43:44.873  INFO 56996 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2022-03-03 13:43:44.882  INFO 56996 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2022-03-03 13:43:44.882  INFO 56996 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.58]
2022-03-03 13:43:44.956  INFO 56996 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2022-03-03 13:43:44.956  INFO 56996 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1100 ms
2022-03-03 13:43:45.314  INFO 56996 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2022-03-03 13:43:45.323  INFO 56996 --- [           main] .t.s.Springboot0101QuickstartApplication : Started Springboot0101QuickstartApplication in 2.062 seconds (JVM running for 4.219)

- Tomcat版本：9.0.58
- 访问端口号：8080
- 内容路径空：用“/”访问
- 浏览器访问：http://localhost:8080/books
              Spring Boot is running ...
- 服务器日志：Spring Boot is running ...

4 关键步骤

Spring Initializr -> Spring Web -> MVC控制器 -> 运行

5 关键文件

pom.xml

Springboot0101QuickstartApplication.java

6 开发对比

_________________________________________________
    不用Spring Boot     |     使用Spring Boot
------------------------|------------------------
  手动添加依赖(pom.xml) |       勾选添加依赖
           |            |             |
           v            |             |
 配置Spring和Spring MVC |             |
           |            |             |
           v            |             |
 配置Web服务器(web.xml) |             |
           |            |             |
           v            |             v
      编写控制器        |        编写控制器
________________________|________________________

7 注意事项

基于IDEA向导开发Spring Boot项目必须联网。

开发Spring Boot项目需要JDK8以上版本。

Spring Boot项目中用到的技术需要勾选。

Spring Boot项目的运行入口在Application类中。

例程：springboot_01_01_quickstart