1 代码实现
1.1 创建Maven工程
使用idea工具创建一个maven工程，该工程为普通的java工程即可
1.2 添加SpringBoot的起步依赖
SpringBoot要求，项目要继承SpringBoot的起步依赖spring-boot-starter-parent
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.1.RELEASE</version> </parent>
SpringBoot要集成SpringMVC进行Controller的开发，所以项目要导入web的启动依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies>
2.1.3 编写SpringBoot引导类
要通过SpringBoot提供的引导类起步SpringBoot才可以进行访问
package com.weiwei; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class MySpringBootApplication { public static void main(String[] args) { SpringApplication.run(MySpringBootApplication.class); } }
2.1.4 编写Controller
在引导类MySpringBootApplication同级包或者子级包中创建QuickStartController
package com.weiwei.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller public class QuickStartController { @RequestMapping("/quick") @ResponseBody public String quick(){ return "springboot 访问成功!"; } }
2.1.5 测试
执行SpringBoot起步类的主方法，控制台打印日志如下：
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.0.1.RELEASE) 2018-05-08 14:29:59.714 INFO 5672 --- [ main] com.itheima.MySpringBootApplication : Starting MySpringBootApplication on DESKTOP-RRUNFUH with PID 5672 (C:\Users\muzimoo\IdeaProjects\IdeaTest\springboot_quick\target\classes started by muzimoo in C:\Users\muzimoo\IdeaProjects\IdeaTest) ... ... ... o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2018-05-08 14:30:03.126 INFO 5672 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2018-05-08 14:30:03.196 INFO 5672 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2018-05-08 14:30:03.206 INFO 5672 --- [ main] com.weiwei.MySpringBootApplication : Started MySpringBootApplication in 4.252 seconds (JVM running for 5.583)
通过日志发现，Tomcat started on port(s): 8080 (http) with context path ''
tomcat已经起步，端口监听8080，web应用的虚拟工程名称为空
打开浏览器访问url地址为：http://localhost:8080/quick
2.2.3 SpringBoot工程热部署
我们在开发中反复修改类、页面等资源，每次修改后都是需要重新启动才生效，这样每次启动都很麻烦，浪费了大量的时间，我们可以在修改代码后不重启就能生效，在 pom.xml 中添加如下配置就可以实现这样的功能，我们称之为热部署。
<!--热部署配置--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency>
注意：IDEA进行SpringBoot热部署失败原因
出现这种情况，并不是热部署配置问题，其根本原因是因为Intellij IEDA默认情况下不会自动编译，需要对IDEA进行自动编译的设置，如下：
勾选图中箭头所指
然后 Shift+Ctrl+Alt+/，选择Registry
点击箭头所指
选中箭头所指,我已经选中,没选中在中间位置
选中箭头所指应用
