Springboot 学习(一)：创建一个Springboot项目

- 日理万妓 2023-02-17 11:14 3阅读 0赞

# 一、需要引入的依赖：pom文件信息 #

<?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 https://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>2.2.2.RELEASE</version>
    		<relativePath/> 
    	</parent>
    	<groupId>com.example</groupId>
    	<artifactId>spring-boot</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<name>spring-boot</name>
    	<description>Demo project for Spring Boot</description>
    
    	<properties>
    		<java.version>1.8</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    
    </project>

# 二、创建启动类 #

package com.example.springboot;
    
    import java.util.Arrays;
    
    import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.Bean;
    
    @SpringBootApplication
    public class Application {
    
        public static void main(String[] args) {	        
            SpringApplication.run(Application.class, args);
        }
    
    }
    
    // @SpringBootApplication 注解包含了以下三个注解：
    // 1. @Configuration：表明这个类是个配置类
    // 2. @EnableAutoConfiguration：启用配置，告诉Spring Boot根据配置类来执行操作
    // 3. @ComponentScan：扫描其他的组件和配置
    
    /*  @Bean
        public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
    	return args -> {
    	    System.out.println("打印所有Spring Boot注入的Bean:");
    		String[] beanNames = ctx.getBeanDefinitionNames();
    		    Arrays.sort(beanNames);
    	           	for (String beanName : beanNames) {
    	        	    System.out.println(beanName);
    			}
                    };
        }*/

# 三、创建Web应用类 #

package com.example.springboot;
    
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @RestController
    public class HelloController {
    
    	@RequestMapping("/")
    	public String index() {
    		return "Greetings from Spring Boot!";
    	}
    
    }

# 四、启动程序并进行测试 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODA4NTc4Mw_size_16_color_FFFFFF_t_70][]

![20200613170750313.png][]

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本文是由作者个人学习所书写，未经允许请勿应用到其他领域，否则后果自负。编写过程中难免有疏漏，还望不吝赐教。

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[20200613170750313.png]: https://img-blog.csdnimg.cn/20200613170750313.png