1.SpringBoot的起步练习

1.新建项目

1.新建一个SpringBoot的项目

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2.这边的包名可根据自己修改

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3.依赖可选可不选，尽量后期自己加

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4.核对名称

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5.建好之后左右如下图所示

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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>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </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
* @author张楠燕
 */
@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;
/*
*Spring Boot 的启动主类
 */
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@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

  
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• 之后在postman中运行，如图所示

  
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