创建一个maven工程（jar）

1、新建一个项目

2、导入spring boot相关的依赖

springboot创建工程官网参考地址：

https://start.spring.io/

https://spring.io/quickstart

pom.xml文件

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.stu</groupId>
    <artifactId>springboot-helloword</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>
</project>

3、编写一个主程序，启动Spring Boot应用

HelloWordApplication主程序

@SpringBootApplication 来标注一个主程序类，说明这是一个Spring Boot应用

package com.stu;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class HelloWordApplication {

    public static void main(String[] args) {
        SpringApplication.run(HelloWordApplication.class, args);
    }
}

4、编写相关的Controller

5、启动HelloWordApplication类里的main方法，访问游览器http://localhost:8080/hello