SpringBoot开发入门（一）Hello World

矫情吗；* 2022-06-09 06:07 215阅读 0赞

SpringBoot 官方文档地址（[点击这里][Link 1]）

## 搭建环境 ##

首先创建一个maven项目SpringBootDemo，pom.xml文件如下

<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/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.example</groupId>
      <artifactId>SpringBootDemo</artifactId>
      <packaging>war</packaging>
      <version>0.0.1-SNAPSHOT</version>
    
       
      <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>1.5.2.RELEASE</version>
      </parent>
    
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
      </properties>
    
      <dependencies>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
      </dependencies>
    
      <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>  
                    <jvmArguments>-Dfile.encoding=UTF-8</jvmArguments>  
                </configuration> 
            </plugin>
        </plugins>
      </build>
    
    </project>

新建一个Application启动类

package com.example.demo;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /** * * @author jiangqk * @data 2017年8月29日 下午4:54:18 */
    @SpringBootApplication
    public class Application { 
    
        public static void main(String[] args) {
            SpringApplication app = new SpringApplication(Application.class);
            app.run(args);
        }
    }

新建一个HelloController,

package com.example.demo.controller;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /** * * @author jiangqk * @data 2017年8月29日 下午4:57:03 */
    @RestController
    public class HelloController { 
    
        @RequestMapping("/sys")
        public String sysHello() {
            return "Hello World";
        }
    }

项目结构如图所示  
![这里写图片描述][SouthEast]

执行Application启动类的main方法  
访问地址[http://localhost:8080/sys][http_localhost_8080_sys]

运行结果如图所示  
![这里写图片描述][SouthEast 1]

demo完成

[Link 1]: https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/
[SouthEast]: /images/20220609/aad62a745cf64512b6d7ed23e35bb64e.png
[http_localhost_8080_sys]: http://localhost:8080/sys
[SouthEast 1]: /images/20220609/1cad5fc5a23a474f9d0705530291413a.png