HelloWorld

SpringBoot 2.x

# 文件夹结构是这样的

# pom.xml 这样写

<?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>2.5.14-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>SpringBootCase</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SpringBootCase</name>
    <description>SpringBootCase</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <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>

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# 主函数这样写

@SpringBootApplication
public class SpringBootCaseApplication {

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

}

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# 配置文件这样写

server:
  port: 8080

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# 再来个 Controller

package com.example.controller;

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

/**
 * @author xueliang
 * @description TODO
 * @date 2022-05-19 16:54
 */
@RestController
public class HelloWrold {

    @RequestMapping("/hello,world")
    public String hello() {
        return "hello,world";
    }
}

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# 跑起来

# 完事

← Spring Transaction 事务异常处理→