二、SpringBoot快速入门
2.1 代码实现
2.1.1 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
2.1.2 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.itheima;
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.itheima.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.itheima.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
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