一、SpringBoot 创建

1、创建maven项目

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2、导入Maven依赖

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

3、编写SpringBoot代码

package com.mystudy;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @SpringBootApplication 标注springboot主程序类
 */
@SpringBootApplication
public class HelloMainApplication {

    // SpringBoot 启动方法
    public static void main(String[] args) {
        SpringApplication.run(HelloMainApplication.class);
    }

}

package com.mystudy.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloController {

    @RequestMapping("/hello")
    @ResponseBody
    public String hello(){
        return "first springBoot application";
    }
}

4、运行SpringBoot项目

1.启动SpringBoot的main()方法

image.png

2.程序运行成功，默认端口8080

image.png
3.测试

image.png

二、SpringBoot项目打包可执行jar包

1、导入maven依赖

 <!--这个插件可以将springboot应用打包成可执行jar包-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>