1.新建一个SpringBoot模块

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1.1项目名可以根据自己需要，我这里是默认

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1.2注意这里什么都不需要勾选(自己添加依赖包)

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1.3完成新模块的创建

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1.4建好之后如图

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2.SpringBoot起步练习

• pom.xml添加依赖

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.springboot</groupId>
    <artifactId>quickstart</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>quickstart</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
   <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

• HelloController类

package com.springboot.quickstart.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 *SpringBoot的第一个RESTful请求
 */
@RestController
public class HelloController {

    @RequestMapping(value = "/hello",method = RequestMethod.GET)
    public String getHello(){
        return "Hello,Spring Boot";
    }
}

• Application启动主类

package com.springboot.quickstart;

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

/**
 * SpringBoot的启动主类
 */
@SpringBootApplication
public class QuickstartApplication {

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

}

• 运行结果(出现这两行运行成功)

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• postman运行结果

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