1、SpringBoot的起步练习

1、新建一个SpringBoot的项目

第一步.png 第二步.png

• 这边的包名可根据自己修改

  
  第三步.png

• 依赖可选可不选，尽量后期自己加

  
  第四步.png

• 核对名称

  
  第五步.png

• 建好之后左右如下图所示

  
  第六步.png

2、起步小练习

• 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);
    }

}

• 看到这两行代表运行成功

  
  Snipaste_2019-03-18_17-28-31.png

• 之后在postman中运行，如图所示

  
  Snipaste_2019-03-18_17-30-43.png