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章节导航

创建 SpringBoot 项目 ​

两种创建方式都可以

初始化项目的工具 ​

项目初始化 ​

Flie --> new --> Project

填写项目基础信息 ​

选择基础包 ​

以 Maven 的方式创建 ​

创建 Maven 项目 ​

Flie --> new --> Project

创建 Maven 项目, 项目包名 groupId, 有自己的域名, 就写成自己的域名, 没有建议写成 com.github.xxx, xxx 是自己名字的拼音

依赖管理 ​

在 pom 文件中添加项目依赖

xml
<dependencyManagement>
        <dependencies>
            <!-- spring boot 依赖 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>2.6.11</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

引入 web 启动容器 ​

xml
<dependencies>
        <!-- 启动容器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-undertow</artifactId>
        </dependency>
        
    </dependencies>

完整的 pom 文件 ​

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>

    <groupId>com.github.itdachen</groupId>
    <artifactId>spring-boot-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>12</java.version>
        <maven.compiler.source>${java.version}</maven.compiler.source>
        <maven.compiler.target>${java.version}</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <spring.boot.dependencies.version>2.6.11</spring.boot.dependencies.version>

    </properties>


    <dependencyManagement>
        <dependencies>
            <!-- spring boot 依赖 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.dependencies.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <dependencies>
        <!-- 启动容器 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-undertow</artifactId>
        </dependency>
        
    </dependencies>
    
</project>

创建项目启动类 ​

添加 SpringBootDemoBootstrap 类, 添加 @SpringBootApplication 注解

@SpringBootApplication
public class SpringBootDemoBootstrap {

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

}

Hello Spring Boot ​

编写 HelloSpringBootController 类

@Controller
@RequestMapping("/hello")
public class HelloSpringBootController {

    @GetMapping("/spring/boot")
    @ResponseBody 
    public String helloSpringBoot() {
        return "Hello Spring Boot";
    }

}

启动项目, 在浏览器输入 http://127.0.0.1:8080/hello/spring/boot, 页面展示 Hello Spring Boot

编写配置文件 ​

在 resources 下创建 application.yml 文件, 定义项目启动端口为 8081,项目名称为 spring-boot-demo, application.yml 配置文件如下

server:
  # 端口配置
  port: 8081

spring:
  application:
    name: spring-boot-demo

启动项目, 在浏览器输入 http://127.0.0.1:8081/hello/spring/boot, 页面展示 Hello Spring Boot

为了方便, 端口设置成 8080

server:
  # 端口配置
  port: 8080

spring:
  application:
    name: spring-boot-demo

项目结构 ​