Spring Boot 3.7 Web 入门开发 HelloWorld入门案例_springboot3 简单的web示例-优快云博客

环境说明

开发环境：Windows11 + JDK17 + Maven3.8 + IntelliJ IDEA 2024.3

Maven3.8配置

settings.xml（C:\Users\admin\.m2）

<?xml version="1.0" encoding="UTF-8"?>


<settings xmlns="http://maven.apache.org/SETTINGS/1.2.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.2.0 https://maven.apache.org/xsd/settings-1.2.0.xsd">
  
	<localRepository>D:\Apps\Java\Maven\Repository</localRepository>
  
	<profiles>
		<profile>     
			<id>JDK-1.8</id>       
			<activation>       
				<activeByDefault>true</activeByDefault>       
				<jdk>1.8</jdk>       
			</activation>       
			<properties>       
				<maven.compiler.source>1.8</maven.compiler.source>       
				<maven.compiler.target>1.8</maven.compiler.target>       
				<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>       
			</properties>
		</profile>
	</profiles>

	<mirrors>
		<!--阿里云公共仓库是central仓和jcenter仓的聚合仓-->
		<mirror>
			<id>aliyunmaven</id>
			<mirrorOf>*</mirrorOf>
			<name>阿里云公共仓库</name>
			<url>https://maven.aliyun.com/repository/public</url>
		</mirror>
		<mirror>
			<id>aliyunmaven</id>
			<mirrorOf>*</mirrorOf>
			<name>阿里云谷歌仓库</name>
			<url>https://maven.aliyun.com/repository/google</url>
		</mirror>
		<mirror>
			<id>aliyunmaven</id>
			<mirrorOf>*</mirrorOf>
			<name>阿里云阿帕奇仓库</name>
			<url>https://maven.aliyun.com/repository/apache-snapshots</url>
		</mirror>
		<mirror>
			<id>aliyunmaven</id>
			<mirrorOf>*</mirrorOf>
			<name>阿里云spring仓库</name>
			<url>https://maven.aliyun.com/repository/spring</url>
		</mirror>
		<mirror>
			<id>aliyunmaven</id>
			<mirrorOf>*</mirrorOf>
			<name>阿里云spring插件仓库</name>
			<url>https://maven.aliyun.com/repository/spring-plugin</url>
		</mirror>
		<mirror>
			<id>maven</id>
			<mirrorOf>*</mirrorOf>
			<name>maven仓库</name>
			<url>https://mvnrepository.com/</url>
		</mirror>
	</mirrors>

</settings>

Idea创建SpringBoot项目

pom.xml

<?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>3.3.7</version>
        <relativePath/>
    </parent>

    <groupId>org.springboot.admin</groupId>
    <artifactId>springboot-admin</artifactId>
    <version>1.0.0</version>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>17</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>

MyApplication.java

package org.springboot.admin;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }

}

DemoController.java

package org.springboot.admin.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController()
@RequestMapping("/demo")
public class DemoController {

    @GetMapping("/index")
    public String index(){
        return "hello world~!";
    }

}

运行： MyApplication -> 右键 -> Run MyApplication.main()

访问：http://127.0.0.1:8080/demo/index