【springboot】从零开始-入门篇

水深无声 2022-05-25 11:18 223阅读 0赞

# 环境准备 #

jdk 1.8 maven eclipse(或idea) 需要安装STS(spring-tool-suite)插件

# 建一个maven项目 #

## 项目目录结构 ##

![20180515144526422][]

## pom.xml ##

<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.demo</groupId>
      <artifactId>spring-boot-hello</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>jar</packaging>
    
      <name>spring-boot-hello</name>
      <url>http://maven.apache.org</url>
     
    	
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.4.1.RELEASE</version>
    	</parent>
    	
      <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-web</artifactId>
    				
    		</dependency>
    		
      </dependencies>
    </project>

## HelloController.java ##

package com.demo;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * @author sms
     *
     */
    @RestController
    public class HelloController {
    
    	/**
    	 * @return
    	 */
    	@RequestMapping("/hello")
    	public String hello(){
    		return "helloWorld";
    	}
    }

## 启动类 ##

package com.demo;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * Hello world!
     *
     */
    @SpringBootApplication
    public class App 
    {
        public static void main( String[] args )
        {
           SpringApplication.run(App.class, args);
        }
    }

## 项目启动 ##

问题-启动后自动停止

![20180515145506508][]

解决方法

右击项目 -> debug as -> Maven build在Goals中输入：dependency:purge-local-repository（清理本地仓库）

等待运行完毕。

![20180515150202353][]

接下来输入路径访问就可以了。

# 小结 #

看着还是挺简单的。

[20180515144526422]: /images/20220525/0518c6677e47426095b4252cc8a4b0a5.png
[20180515145506508]: /images/20220525/e9290910f4a74c2b9c2adefce8ef6d4d.png
[20180515150202353]: /images/20220525/3fa3451a4d6644f981a7be43c043cdcb.png